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GitHub - pathikrit/better-files: Simple, safe and intuitive Scala I/O
better-files
better-files
is a dependency-free pragmatic thin Scala wrapper around Java NIO.
Consult the changelog if you are upgrading your library.
Questions?
Ask in our gitter channel or file an issue with the question tag
Motivation
Imagine you have to write the following method:
- List all
.csv
files in a directory by increasing order of file size - Drop the first line of each file and concat the rest into a single output file
- Split the above output file into
n
smaller files without breaking up the lines in the input files gzip
each of the smaller output files
Note: Your program should work when files are much bigger than memory in your JVM and must close all open resources correctly
The above task is not that easy to write in Java or shell or Python without a certain amount of Googling. Using better-files, the above problem can be solved in a fairly straightforward way:
import better.files._
def run(inputDir: File, outputDir: File, n: Int) = {
val count = new AtomicInteger()
val outputs = Vector.tabulate(n)(i => outputDir / s"part-$i.csv.gz")
for {
writers <- outputs.map(_.newGzipOutputStream().printWriter()).autoClosed
inputFile <- inputDir.list(_.extension == Some(".csv")).toSeq.sorted(File.Order.bySize)
line <- inputFile.lineIterator.drop(1)
} writers(count.incrementAndGet() % n).println(line)
}
Tests
Talks
Tutorial
- Installation
- Instantiation
- Simple I/O
- Resource APIs
- Streams
- Encodings
- Java serialization utils
- Java compatibility
- Globbing
- File system operations
- Checksums
- Temporary files
- UNIX DSL
- File attributes
- File comparison
- Zip/GZip
- Automatic Resource Management
- Scanner
- File Monitoring
- Reactive File Watcher
Installation
sbt
:
libraryDependencies += "com.github.pathikrit" %% "better-files" % version
mill
:
import mill._, scalalib._
object moduleName extends ScalaModule {
override def ivyDeps = Agg(
ivy"com.github.pathikrit::better-files:${version}"
)
}
Available Versions:
Scala | Scaladoc | Maven Releases | Sonatype Snapshots |
---|---|---|---|
Scala 3 | |||
Scala 2.13 | |||
Scala 2.12 | |||
Scala 2.11 | |||
Scala 2.10 |
Instantiation
The following are all equivalent:
import better.files._
import File._
import java.io.{File => JFile}
val f = File("/User/johndoe/Documents") // using constructor
val f1: File = file"/User/johndoe/Documents" // using string interpolator
val f2: File = "/User/johndoe/Documents".toFile // convert a string path to a file
val f3: File = new JFile("/User/johndoe/Documents").toScala // convert a Java file to Scala
val f4: File = root/"User"/"johndoe"/"Documents" // using root helper to start from root
val f5: File = `~` / "Documents" // also equivalent to `home / "Documents"`
val f6: File = "/User"/"johndoe"/"Documents" // using file separator DSL
val f7: File = "/User"/'johndoe/'Documents // same as above but using Symbols instead of Strings
val f8: File = home/"Documents"/"presentations"/`..` // use `..` to navigate up to parent
Note: Rename the import if you think the usage of the class File
may confuse your teammates:
import better.files.{File => ScalaFile, _}
import java.io.File
I personally prefer renaming the Java crap instead:
import better.files._
import java.io.{File => JFile}
File Read/Write
Dead simple I/O:
val file = root/"tmp"/"test.txt"
file.overwrite("hello")
file.appendLine().append("world")
assert(file.contentAsString() == "hello\nworld")
If you are someone who likes symbols, then the above code can also be written as:
import better.files.Dsl.SymbolicOperations
file < "hello" // same as file.overwrite("hello")
file << "world" // same as file.appendLines("world")
assert(file! == "hello\nworld")
Or even, right-associatively:
import better.files.Dsl.SymbolicOperations
"hello" `>:` file
"world" >>: file
val bytes: Array[Byte] = file.loadBytes
(root/"tmp"/"diary.txt")
.createIfNotExists()
.appendLine()
.appendLines("My name is", "Inigo Montoya")
.moveToDirectory(home/"Documents")
.renameTo("princess_diary.txt")
.changeExtensionTo(".md")
.lines()
Resource APIs
Confused by the various ways to load resources in Java? Worry no more:
val resource : InputStream = Resource.getAsStream("foo.txt") //Same as this.getClass().getResource("foo.txt")
val resourceURL : java.net.URL = Resource.getUrl("foo.txt")
val rootResourceURL : java.net.URL = Resource.getUrl()
val resourceAsStr : String = Resource.getAsString("foo.txt")
The above APIs can load from custom ClassLoader
s too:
val resource : InputStream = Resource.at[MyClass].getAsStream("foo.txt")
Streams
Various ways to slurp a file without loading its contents into memory:
val bytes : Iterator[Byte] = file.bytes()
val chars : Iterator[Char] = file.chars()
val lines : Iterator[String] = file.lineIterator() //file.lines loads all lines in memory
Note: The above APIs can be traversed at most once e.g. file.bytes
is a Iterator[Byte]
which only allows TraversableOnce
.
To traverse it multiple times without creating a new iterator instance, convert it into some other collection e.g. file.bytes.toStream
You can write an Iterator[Byte]
or an Iterator[String]
back to a file:
file.writeBytes(bytes)
file.printLines(lines)
tee
multiple outputstreams:
val s3 = s1 tee s2
s3.printWriter.println(s"Hello world") // gets written to both s1 and s2
Encodings
You can supply your own charset too for anything that does a read/write (it assumes java.nio.charset.Charset.defaultCharset()
if you don't provide one):
val content: String = file.contentAsString() // default charset
// custom charset:
import java.nio.charset.Charset
file.contentAsString(charset = Charset.forName("US-ASCII"))
//or simply using implicit conversion from Strings
file.write("hello world", charset = "US-ASCII")
Note: By default, better-files
correctly handles BOMs while decoding.
If you wish to have the incorrect JDK behaviour,
you would need to supply Java's UTF-8 charset e.g.:
file.contentAsString(charset = Charset.forName("UTF-8")) // Default incorrect JDK behaviour for UTF-8 (see: JDK-4508058)
If you also wish to write BOMs while encoding, you would need to supply it as:
file.write("hello world", charset = UnicodeCharset("UTF-8", writeByteOrderMarkers = true))
Java serialization utils
Some common utils to serialize/deserialize using Java's serialization util
case class Person(name: String, age: Int)
val person = new Person("Chris", 24)
// Write
file.newOutputStream().asObjectOutputStream.serialize(obj).flush()
// Read
val person2 = file.newInputStream().asObjectInputStream.deserialize[Person]
assert(person == person2)
// Read using custom class loader:
file.newInputStream().asObjectInputStreamUsingClassLoader(classLoader = myClassLoader).deserialize[Person]
The above can be simply written as:
val person2: Person = file.writeSerialized(person).readDeserialized()
assert(person == person2)
Java interoperability
You can always access the Java I/O classes:
val file: File = tmp / "hello.txt"
val javaFile : java.io.File = file.toJava
val uri : java.net.URI = file.uri
val url : java.net.URL = file.url
val reader : java.io.BufferedReader = file.newBufferedReader()
val outputstream : java.io.OutputStream = file.newOutputStream()
val writer : java.io.BufferedWriter = file.newBufferedWriter()
val inputstream : java.io.InputStream = file.newInputStream()
val path : java.nio.file.Path = file.path
val fs : java.nio.file.FileSystem = file.fileSystem
val channel : java.nio.channel.FileChannel = file.newFileChannel()
val ram : java.io.RandomAccessFile = file.newRandomAccess()
val fr : java.io.FileReader = file.newFileReader()
val fw : java.io.FileWriter = file.newFileWriter(append = true)
val printer : java.io.PrintWriter = file.newPrintWriter()
The library also adds some useful implicits to above classes e.g.:
file1.reader() > file2.writer () // pipes a reader to a writer
System.in > file2.out // pipes an inputstream to an outputstream
src.pipeTo(sink) // if you don't like symbols
val bytes : Iterator[Byte] = inputstream.bytes()
val bis : BufferedInputStream = inputstream.buffered()
val bos : BufferedOutputStream = outputstream.buffered()
val reader : InputStreamReader = inputstream.reader()
val writer : OutputStreamWriter = outputstream.writer()
val printer : PrintWriter = outputstream.printWriter()
val br : BufferedReader = reader.buffered()
val bw : BufferedWriter = writer.buffered()
val mm : MappedByteBuffer = fileChannel.toMappedByteBuffer()
val str : String = inputstream.asString() //Read a string from an InputStream
val in : InputStream = str.inputStream()
val reader : Reader = str.reader()
val lines : Seq[String] = str.lines()
better-files
also supports certain conversions that are not supported out of the box by the JDK
Globbing
No need to port this to Scala:
val dir = "src"/"test"
val matches: Iterator[File] = dir.glob("**/*.{java,scala}")
// above code is equivalent to:
dir.listRecursively().filter(f => f.extension == Some(".java") || f.extension == Some(".scala"))
You can even use more advanced regex syntax instead of glob syntax:
val matches = dir.globRegex("^\\w*$".r) //equivalent to dir.glob("^\\w*$")(syntax = File.PathMatcherSyntax.regex)
By default, glob syntax in better-files
is different from
the default JDK glob behaviour since it always includes path. To use the default behaviour:
dir.glob("**/*.txt", includePath = false) // JDK default
//OR
dir.glob("*.txt", includePath = true) // better-files default
You can also extend the File.PathMatcherSyntax
to create your own matchers.
For custom cases:
dir.collectChildren(_.isSymbolicLink) // collect all symlinks in a directory
For simpler cases, you can always use dir.list
or dir.walk(maxDepth: Int)
File system operations
Utilities to ls
, cp
, rm
, mv
, ln
, md5
, touch
, cat
etc:
file.touch()
file.delete() // unlike the Java API, also works on directories as expected (deletes children recursively)
file.clear() // If directory, deletes all children; if file clears contents
file.renameTo(newName: String)
file.moveTo(destination)
file.moveToDirectory(destination)
file.copyTo(destination) // unlike the default API, also works on directories (copies recursively)
file.copyToDirectory(destination)
file.linkTo(destination) // ln destination file
file.symbolicLinkTo(destination) // ln -s destination file
file.setOwner(user: String) // chown user file
file.setGroup(group: String) // chgrp group file
Seq(file1, file2) `>:` file3 // same as cat file1 file2 > file3 (must import import better.files.Dsl.SymbolicOperations)
Seq(file1, file2) >>: file3 // same as cat file1 file2 >> file3 (must import import better.files.Dsl.SymbolicOperations)
file.isReadLocked(); file.isWriteLocked(); file.isLocked()
File.numberOfOpenFileDescriptors() // number of open file descriptors
Checksums
One liner checksum for files:
file.md5() // equivalent to file.checksum("md5")
file.sha1()
file.sha256()
file.sha512()
Note: The above also works for directories (it recursively computes for each file in the directory).
For input/output streams:
val md5: String = inputstream.md5.hexDigest()
val md5: String = outputstream.md5.hexDigest()
The above consumes and closes the inputstream
. If you want to write it to a file AND also compute the sha512
, you can do:
val md5: String = inputstream.sha512.hexDigest(drainTo = someFile)
Temporary files
Utils to create temporary files:
File.newTemporaryDirectory()
File.newTemporaryFile()
The above APIs allow optional specifications of prefix
, suffix
and parentDir
.
These files are not deleted automatically on exit by the JVM (you have to set deleteOnExit
which adds to shutdownHook
).
A cleaner alternative is to use self-deleting file contexts which deletes the file immediately when done:
for {
tempFile <- File.temporaryFile()
} doSomething(tempFile) // tempFile is auto deleted at the end of this block - even if an exception happens
OR equivalently:
File.usingTemporaryFile() {tempFile =>
//do something
} // tempFile is auto deleted at the end of this block - even if an exception happens
You can make any files temporary (i.e. delete after use) by doing this:
val foo = File.home / "Downloads" / "foo.txt"
for {
temp <- foo.toTemporary
} doSomething(temp) // foo is deleted at the end of this block - even if an exception happens
UNIX DSL
All the above can also be expressed using methods reminiscent of the command line:
import better.files._
import better.files.Dsl._ // must import Dsl._ to bring in these utils
pwd / cwd // current dir
cp(file1, file2)
mv(file1, file2)
rm(file) /*or*/ del(file)
ls(file) /*or*/ dir(file)
ln(file1, file2) // hard link
ln_s(file1, file2) // soft link
cat(file1)
cat(file1) >>: file
touch(file)
mkdir(file)
mkdirs(file) // mkdir -p
chown(owner, file)
chgrp(owner, file)
chmod_+(permission, files) // add permission
chmod_-(permission, files) // remove permission
md5(file); sha1(file); sha256(file); sha512(file)
unzip(zipFile)(targetDir)
zip(file*)(targetZipFile)
ungzip(gzipFile)(targetFile)
gzip(file)(targetGZipFile)
File attributes
Query various file attributes e.g.:
file.name // simpler than java.io.File#getName
file.extension()
file.contentType()
file.lastModifiedTime () // returns JSR-310 time
file.owner()
file.group()
file.isDirectory(); file.isSymbolicLink(); file.isRegularFile()
file.isHidden()
file.hide(); file.unhide()
file.isOwnerExecutable(); file.isGroupReadable() // etc. see file.permissions
file.size() // for a directory, computes the directory size
file.posixAttributes(); file.dosAttributes() // see file.attributes
file.isEmpty(); file.nonEmpty() // true if file has no content (or no children if directory) or does not exist and vice-versa
file.isParentOf(); file.isChildOf(); file.isSiblingOf(); file.siblings()
file("dos:system") = true // set custom meta-data for file (similar to Files.setAttribute)
All the above APIs let you specify the LinkOption
either directly:
file.isDirectory(LinkOption.NOFOLLOW_LINKS)
Or using the File.LinkOptions
helper:
file.isDirectory(File.LinkOptions.noFollow)
chmod
:
import java.nio.file.attribute.PosixFilePermission
file.addPermission(PosixFilePermission.OWNER_EXECUTE) // chmod +X file
file.removePermission(PosixFilePermission.OWNER_WRITE) // chmod -w file
assert(file.permissionsAsString() == "rw-r--r--")
// The following are all equivalent:
assert(file.permissions contains PosixFilePermission.OWNER_EXECUTE)
assert(file.testPermission(PosixFilePermission.OWNER_EXECUTE))
assert(file.isOwnerExecutable())
File comparison
Use ==
to check for path-based equality and ===
for content-based equality:
file1 == file2 // equivalent to `file1.isSamePathAs(file2)`
file1 === file2 // equivalent to `file1.isSameContentAs(file2)` (works for regular-files and directories)
file1 != file2 // equivalent to `!file1.isSamePathAs(file2)`
file1 !== file2 // equivalent to `!file1.isSameContentAs(file2)`
There are also various Ordering[File]
instances included, e.g.:
val files = myDir.list.toSeq
files.sorted(File.Order.byName)
files.max(File.Order.bySize)
files.min(File.Order.byDepth)
files.max(File.Order.byModificationTime)
files.sorted(File.Order.byDirectoriesFirst)
Zip APIs
You don't have to lookup on StackOverflow "How to zip/unzip/gzip in Java/Scala?":
// Unzipping:
val zipFile: File = file"path/to/research.zip"
val research: File = zipFile.unzipTo(destination = home/"Documents"/"research")
// Zipping:
val zipFile: File = directory.zipTo(destination = home/"Desktop"/"toEmail.zip")
// Zipping in:
val zipFile = File("countries.zip").zipIn(Iterator(file"usa.txt", file"russia.txt"))()
// Zipping/Unzipping to temporary files/directories:
val someTempZipFile: File = directory.zip()
val someTempDir: File = someTempZipFile.unzip()
assert(directory === someTempDir)
Mapping over each ZipEntry
:
val fileNames = zipFile.newZipInputStream.mapEntries(_.getName) // gets the file names inside the zip file
GZIP handling:
File("big-data.csv").gzipTo(File("big-data.csv.gz"))
File("big-data.csv.gz").unGzipTo(File("big-data.csv"))
// GZIP stream handling:
File("countries.gz").newInputStream().asGzipInputStream().lines.take(10).foreach(println)
def write(out: OutputStream, countries: Seq[String]) =
out.asGzipOutputStream().printWriter().printLines(countries).close()
Lightweight ARM
Auto-close Java closeables:
for {
in <- file1.newInputStream().autoClosed
out <- file2.newOutputStream().autoClosed
} in.pipeTo(out)
// The input and output streams are auto-closed once out of scope
better-files
provides convenient managed versions of all the Java closeables e.g. instead of writing:
for {
reader <- file.newBufferedReader().autoClosed
} foo(reader)
You can write:
for {
reader <- file.bufferedReader() // returns Dispose[BufferedReader]
} foo(reader)
// or simply:
file.bufferedReader().foreach(foo)
Similarly:
for {
reader <- file.bufferedReader()
} yield foo(reader)
// Simpler
file.bufferedReader.map(foo).get()
// Even simpler
file.bufferedReader.apply(foo)
If foo
itself is lazy and depends on reader
being open, you should flatMap
instead of apply
:
def lines(reader: BufferedReader): Iterator[String] = ???
for {
reader <- file.bufferedReader()
line <- lines(reader)
} yield line
// or simply
file.bufferedReader.flatMap(lines)
You can also define your own custom disposable resources e.g.:
trait Shutdownable {
def shutdown(): Unit = ()
}
object Shutdownable {
implicit val disposable: Disposable[Shutdownable] = Disposable(_.shutdown())
}
val s: Shutdownable = ....
for {
instance <- new Dispose(s)
} doSomething(s) // s is disposed after this
using
syntax:
val lines: List[String] = using(file.newInputStream) { stream =>
stream.lines.toList // Must be eager so .toList
}
Auto-closed instances also have a useful method to generate self-closing iterators that auto closes the parent resource on exhaustion:
val lines: Iterator[String] = file.lines() // This will auto close the underlying stream on iterator exhaustion
lines.find(_ == "hello world") //This will auto close the stream if nothing is found OR if the item is found
lines.take(10).size //This will close the stream even if stream has >10 lines
// If you don't want this auto closing behaviour
lines.nonClosing().take(10).size // This would leave stream open if it has >10 lines and only close if stream has no more elements in it
// If you don't even want it to close when underlying stream has no more elements
lines.nonClosing(closeInTheEnd = false) // This will NEVER close the underlying stream - you should probably never need to do this!
Scanner
Although java.util.Scanner
has a feature-rich API, it only allows parsing primitives.
It is also notoriously slow since it uses regexes and does un-Scala things like returns nulls and throws exceptions.
better-files
provides a faster, richer, safer, more idiomatic and compossible Scala replacement
that does not use regexes, allows peeking, accessing line numbers, returns Option
s whenever possible and lets the user mixin custom parsers:
val f1 = File("/tmp/temp.txt")
val data = f1.overwrite(s"""Hello World
| 1 true
| 2 3
""".stripMargin)
val scanner: Scanner = data.newScanner()
assert(scanner.next[String] == "Hello")
assert(scanner.lineNumber == 1)
assert(scanner.next[String] == "World")
assert(scanner.next[(Int, Boolean)] == (1, true))
assert(scanner.nextLine() == " 2 3")
assert(!scanner.hasNext)
If you are simply interested in tokens, you can use file.tokens()
Writing your own custom scanners:
sealed trait Animal
case class Dog(name: String) extends Animal
case class Cat(name: String) extends Animal
implicit val animalParser: Scannable[Animal] = Scannable {scanner =>
val name = scanner.next[String]
if (name == "Garfield") Cat(name) else Dog(name)
}
val scanner = file.newScanner()
println(scanner.next[Animal])
The shapeless-scanner lets you scan HList
s:
val in = Scanner("""
12 Bob True
13 Mary False
26 Rick True
""")
import shapeless._
type Row = Int :: String :: Boolean :: HNil
val out = Seq.fill(3)(in.next[Row])
assert(out == Seq(
12 :: "Bob" :: true :: HNil,
13 :: "Mary" :: false :: HNil,
26 :: "Rick" :: true :: HNil
))
case class Person(id: Int, name: String, isMale: Boolean)
val out2 = Seq.fill(3)(in.next[Person])
Simple CSV reader:
val file = """
23,foo
42,bar
"""
val csvScanner = file.newScanner(StringSplitter.on(','))
csvScanner.next[Int] //23
csvScanner.next[String] //foo
File Monitoring
Vanilla Java watchers:
import java.nio.file.{StandardWatchEventKinds => EventType}
val service: java.nio.file.WatchService = myDir.newWatchService
myDir.register(service, events = Seq(EventType.ENTRY_CREATE, EventType.ENTRY_DELETE))
The above APIs are cumbersome to use (involves a lot of type-casting and null-checking), are based on a blocking polling-based model, does not easily allow recursive watching of directories and nor does it easily allow watching regular files without writing a lot of Java boilerplate.
better-files
abstracts all the above ugliness behind a simple interface:
val watcher = new FileMonitor(myDir, recursive = true) {
override def onCreate(file: File, count: Int) = println(s"$file got created")
override def onModify(file: File, count: Int) = println(s"$file got modified $count times")
override def onDelete(file: File, count: Int) = println(s"$file got deleted")
}
watcher.start()
Thread.sleep(60 * 1000) // The above line starts the monitoring asynchronously
Sometimes, instead of overwriting each of the 3 methods above, it is more convenient to override the dispatcher itself:
import java.nio.file.{Path, StandardWatchEventKinds => EventType, WatchEvent}
val watcher = new FileMonitor(myDir, recursive = true) {
override def onEvent(eventType: WatchEvent.Kind[Path], file: File, count: Int) = eventType match {
case EventType.ENTRY_CREATE => println(s"$file got created")
case EventType.ENTRY_MODIFY => println(s"$file got modified $count")
case EventType.ENTRY_DELETE => println(s"$file got deleted")
}
}
There is also an external module which gives high performance file monitoring and interpolates with better-files. See: https://github.com/gmethvin/directory-watcher#better-files-integration-scala
Akka File Watcher
better-files
also provides an example of how to build a reactive file watcher
based on Akka actors that supports dynamic dispatches:
import akka.actor.{ActorRef, ActorSystem}
import better.files.File.home
import better.files.FileWatcher._
import java.nio.file.{StandardWatchEventKinds => EventType}
implicit val system = ActorSystem("mySystem")
val watcher: ActorRef = (home/"Downloads").newWatcher(recursive = true)
// register partial function for an event
watcher ! on(EventType.ENTRY_DELETE) {
case file if file.isDirectory => println(s"directory $file got deleted")
case file => println(s"$file got deleted")
}
// watch for multiple events
watcher ! when(events = EventType.ENTRY_CREATE, EventType.ENTRY_MODIFY) {
case (EventType.ENTRY_CREATE, file) => println(s"$file got created")
case (EventType.ENTRY_MODIFY, file) => println(s"$file got modified")
}
Benchmarks
> sbt "testOnly better.files.benchmarks.*"
JavaScanner : 2191 ms
StringBuilderScanner : 1325 ms
CharBufferScanner : 1117 ms
StreamingScanner : 212 ms
IterableScanner : 365 ms
IteratorScanner : 297 ms
BetterFilesScanner : 272 ms
ArrayBufferScanner : 220 ms
FastJavaIOScanner2 : 181 ms
FastJavaIOScanner : 179 ms
YourKit supports better-files with its full-featured Java Profiler. YourKit, LLC is the creator of YourKit Java Profiler and YourKit .NET Profiler, innovative and intelligent tools for profiling Java and .NET applications.
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- 10GNU Gettext .po file loader for Scala
https://github.com/xitrum-framework/scaposer
GNU Gettext .po file loader for Scala. Contribute to xitrum-framework/scaposer development by creating an account on GitHub.
- 11Light-weight convenience wrapper around Lucene to simplify complex tasks and add Scala sugar.
https://github.com/outr/lucene4s
Light-weight convenience wrapper around Lucene to simplify complex tasks and add Scala sugar. - outr/lucene4s
- 12Workflow engine for exploration of simulation models using high throughput computing
https://github.com/openmole/openmole
Workflow engine for exploration of simulation models using high throughput computing - openmole/openmole
- 13PostgreSQL protocol support for Finagle
https://github.com/finagle/finagle-postgres
PostgreSQL protocol support for Finagle. Contribute to finagle/finagle-postgres development by creating an account on GitHub.
- 14Simple play module for authenticating against Google
https://github.com/guardian/play-googleauth
Simple play module for authenticating against Google - guardian/play-googleauth
- 15Extensible JOSE library for Scala
https://github.com/blackdoor/jose
Extensible JOSE library for Scala. Contribute to blackdoor/jose development by creating an account on GitHub.
- 16Large off-heap arrays and mmap files for Scala and Java
https://github.com/xerial/larray
Large off-heap arrays and mmap files for Scala and Java - xerial/larray
- 17A scala library for connecting to a redis server, or a cluster of redis nodes using consistent hashing on the client side.
https://github.com/debasishg/scala-redis
A scala library for connecting to a redis server, or a cluster of redis nodes using consistent hashing on the client side. - debasishg/scala-redis
- 18Idiomatic, typesafe, and reactive Scala client for Apache Pulsar
https://github.com/CleverCloud/pulsar4s
Idiomatic, typesafe, and reactive Scala client for Apache Pulsar - CleverCloud/pulsar4s
- 19Purely functional JSON parser and library in scala.
https://github.com/argonaut-io/argonaut
Purely functional JSON parser and library in scala. - argonaut-io/argonaut
- 20Modern Load Testing as Code
https://github.com/gatling/gatling
Modern Load Testing as Code. Contribute to gatling/gatling development by creating an account on GitHub.
- 21A Scala ORM library
https://github.com/kostaskougios/mapperdao
A Scala ORM library. Contribute to kostaskougios/mapperdao development by creating an account on GitHub.
- 22Docker containers for testing in scala
https://github.com/testcontainers/testcontainers-scala
Docker containers for testing in scala. Contribute to testcontainers/testcontainers-scala development by creating an account on GitHub.
- 23A scala diff/patch library for Json
https://github.com/gnieh/diffson
A scala diff/patch library for Json. Contribute to gnieh/diffson development by creating an account on GitHub.
- 24Testing tool in Scala for HTTP JSON API
https://github.com/agourlay/cornichon
Testing tool in Scala for HTTP JSON API. Contribute to agourlay/cornichon development by creating an account on GitHub.
- 25If you don't agree with the data
https://github.com/splink/veto
If you don't agree with the data. Contribute to splink/veto development by creating an account on GitHub.
- 26Software Specifications for Scala
https://github.com/etorreborre/specs2
Software Specifications for Scala. Contribute to etorreborre/specs2 development by creating an account on GitHub.
- 27The Couchbase Monorepo for JVM Clients: Java, Scala, io-core…
https://github.com/couchbase/couchbase-jvm-clients
The Couchbase Monorepo for JVM Clients: Java, Scala, io-core… - couchbase/couchbase-jvm-clients
- 28Salat is a simple serialization library for case classes.
https://github.com/salat/salat
Salat is a simple serialization library for case classes. - salat/salat
- 29Practical effect composition library based on abstract wrapping type and the free monad
https://github.com/ISCPIF/freedsl
Practical effect composition library based on abstract wrapping type and the free monad - ISCPIF/freedsl
- 30SevenZip library for Scala, easy to use.
https://github.com/gonearewe/SevenZ4S
SevenZip library for Scala, easy to use. . Contribute to gonearewe/SevenZ4S development by creating an account on GitHub.
- 31The super light testing library for Scala and Scala.js
https://github.com/monix/minitest
The super light testing library for Scala and Scala.js - monix/minitest
- 32A module that provides OAuth, OAuth2 and OpenID authentication for Play Framework applications
https://github.com/jaliss/securesocial
A module that provides OAuth, OAuth2 and OpenID authentication for Play Framework applications - jaliss/securesocial
- 33Compile-time Language Integrated Queries for Scala
https://github.com/zio/zio-quill
Compile-time Language Integrated Queries for Scala - zio/zio-quill
- 34Scala Scripting
https://github.com/com-lihaoyi/Ammonite
Scala Scripting. Contribute to com-lihaoyi/Ammonite development by creating an account on GitHub.
- 35Slick (Scala Language Integrated Connection Kit) is a modern database query and access library for Scala
https://github.com/slick/slick
Slick (Scala Language Integrated Connection Kit) is a modern database query and access library for Scala - slick/slick
- 36Property-based testing for Scala
https://github.com/typelevel/scalacheck
Property-based testing for Scala. Contribute to typelevel/scalacheck development by creating an account on GitHub.
- 37Simpler DynamoDB access for Scala
https://github.com/scanamo/scanamo
Simpler DynamoDB access for Scala. Contribute to scanamo/scanamo development by creating an account on GitHub.
- 38Type-Safe framework for defining, modifying, and querying SQL databases
https://github.com/outr/scalarelational
Type-Safe framework for defining, modifying, and querying SQL databases - outr/scalarelational
- 39ScalaFX simplifies creation of JavaFX-based user interfaces in Scala
https://github.com/scalafx/scalafx
ScalaFX simplifies creation of JavaFX-based user interfaces in Scala - scalafx/scalafx
- 40Performant database access in Scala
https://github.com/lucidsoftware/relate
Performant database access in Scala. Contribute to lucidsoftware/relate development by creating an account on GitHub.
- 41Scala library for boilerplate-free validation
https://github.com/krzemin/octopus
Scala library for boilerplate-free validation. Contribute to krzemin/octopus development by creating an account on GitHub.
- 42Connect a Scala REPL to running JVM processes without any prior setup
https://github.com/xitrum-framework/scalive
Connect a Scala REPL to running JVM processes without any prior setup - xitrum-framework/scalive
- 43A ZIO-based redis client
https://github.com/zio/zio-redis
A ZIO-based redis client. Contribute to zio/zio-redis development by creating an account on GitHub.
- 44Tiny Scala high-performance, async web framework, inspired by Sinatra
https://github.com/scalatra/scalatra
Tiny Scala high-performance, async web framework, inspired by Sinatra - scalatra/scalatra
- 45Reactive data-binding for Scala
https://github.com/ThoughtWorksInc/Binding.scala
Reactive data-binding for Scala. Contribute to ThoughtWorksInc/Binding.scala development by creating an account on GitHub.
- 46The Anorm database library
https://github.com/playframework/anorm
The Anorm database library. Contribute to playframework/anorm development by creating an account on GitHub.
- 47A module for the Play Framework to build highly modular applications
https://github.com/splink/pagelets
A module for the Play Framework to build highly modular applications - splink/pagelets
- 48I/O and Microservice library for Scala
https://github.com/tumblr/colossus
I/O and Microservice library for Scala. Contribute to tumblr/colossus development by creating an account on GitHub.
- 49Scala library to sign HTTP requests to AWS services.
https://github.com/ticofab/aws-request-signer
Scala library to sign HTTP requests to AWS services. - ticofab/aws-request-signer
- 50Next generation user interface and application development in Scala and Scala.js for web, mobile, and desktop.
https://github.com/outr/youi
Next generation user interface and application development in Scala and Scala.js for web, mobile, and desktop. - outr/youi
- 51Statistical Machine Intelligence & Learning Engine
https://github.com/haifengl/smile
Statistical Machine Intelligence & Learning Engine - haifengl/smile
- 52Microbenchmarking and performance regression testing framework for the JVM platform.
https://github.com/scalameter/scalameter
Microbenchmarking and performance regression testing framework for the JVM platform. - scalameter/scalameter
- 53A testing tool for Scala and Java developers
https://github.com/scalatest/scalatest
A testing tool for Scala and Java developers. Contribute to scalatest/scalatest development by creating an account on GitHub.
- 54:monorail: "Scala on Rails" - A full-stack web app framework for rapid development in Scala
https://github.com/skinny-framework/skinny-framework
:monorail: "Scala on Rails" - A full-stack web app framework for rapid development in Scala - skinny-framework/skinny-framework
- 55Molecule translates custom Scala code to database queries for multiple databases.
https://github.com/scalamolecule/molecule
Molecule translates custom Scala code to database queries for multiple databases. - scalamolecule/molecule
- 56Cryptographic primitives for Scala
https://github.com/input-output-hk/scrypto
Cryptographic primitives for Scala. Contribute to input-output-hk/scrypto development by creating an account on GitHub.
- 57A lightweight framework for writing REST services in Scala.
https://github.com/mesosphere/chaos
A lightweight framework for writing REST services in Scala. - mesosphere/chaos
- 58Async and clustered Scala web framework and HTTP(S) server
https://github.com/xitrum-framework/xitrum
Async and clustered Scala web framework and HTTP(S) server - xitrum-framework/xitrum
- 59A distributed tracing extension for Akka. Provides integration with Play framework, Spray and Akka HTTP.
https://github.com/levkhomich/akka-tracing
A distributed tracing extension for Akka. Provides integration with Play framework, Spray and Akka HTTP. - levkhomich/akka-tracing
- 60A simple FRP library and a web UI framework built on it
https://github.com/nafg/reactive
A simple FRP library and a web UI framework built on it - nafg/reactive
- 61Facebook's React on Scala.JS
https://github.com/japgolly/scalajs-react
Facebook's React on Scala.JS. Contribute to japgolly/scalajs-react development by creating an account on GitHub.
- 62Figaro Programming Language and Core Libraries
https://github.com/charles-river-analytics/figaro
Figaro Programming Language and Core Libraries. Contribute to charles-river-analytics/figaro development by creating an account on GitHub.
- 63Optimus is a mathematical programming library for Scala.
https://github.com/vagmcs/Optimus
Optimus is a mathematical programming library for Scala. - vagmcs/Optimus
- 64Fast JSON parser/generator for Scala
https://github.com/gzoller/ScalaJack
Fast JSON parser/generator for Scala. Contribute to gzoller/ScalaJack development by creating an account on GitHub.
- 65Apache Spark - A unified analytics engine for large-scale data processing
https://github.com/apache/spark
Apache Spark - A unified analytics engine for large-scale data processing - apache/spark
- 66scala SQL api
https://github.com/wangzaixiang/scala-sql
scala SQL api. Contribute to wangzaixiang/scala-sql development by creating an account on GitHub.
- 67Scala support library for integrating the JSON API spec with Spray, Play! or Circe
https://github.com/scala-jsonapi/scala-jsonapi
Scala support library for integrating the JSON API spec with Spray, Play! or Circe - scala-jsonapi/scala-jsonapi
- 68Scala code generator for Avro schemas.
https://github.com/malcolmgreaves/avro-codegen
Scala code generator for Avro schemas. Contribute to malcolmgreaves/avro-codegen development by creating an account on GitHub.
- 69Protocol buffer compiler for Scala.
https://github.com/scalapb/ScalaPB
Protocol buffer compiler for Scala. Contribute to scalapb/ScalaPB development by creating an account on GitHub.
- 70Functional JDBC layer for Scala.
https://github.com/tpolecat/doobie
Functional JDBC layer for Scala. Contribute to tpolecat/doobie development by creating an account on GitHub.
- 71CPU and GPU-accelerated Machine Learning Library
https://github.com/BIDData/BIDMach
CPU and GPU-accelerated Machine Learning Library. Contribute to BIDData/BIDMach development by creating an account on GitHub.
- 72Graph for Scala is intended to provide basic graph functionality seamlessly fitting into the Scala Collection Library. Like the well known members of scala.collection, Graph for Scala is an in-memory graph library aiming at editing and traversing graphs, finding cycles etc. in a user-friendly way.
https://github.com/scala-graph/scala-graph
Graph for Scala is intended to provide basic graph functionality seamlessly fitting into the Scala Collection Library. Like the well known members of scala.collection, Graph for Scala is an in-memo...
- 73Axle Domain Specific Language for Scientific Cloud Computing and Visualization
https://github.com/axlelang/axle
Axle Domain Specific Language for Scientific Cloud Computing and Visualization - axlelang/axle
- 74Lightweight and fast serialization library for Scala 2/3 based on Protocol Buffers with macros
https://github.com/zero-deps/proto
Lightweight and fast serialization library for Scala 2/3 based on Protocol Buffers with macros - zero-deps/proto
- 75Scala Uniquely Bound Classes Under Traits
https://github.com/dickwall/subcut
Scala Uniquely Bound Classes Under Traits. Contribute to dickwall/subcut development by creating an account on GitHub.
- 76Highly available distributed strong eventual consistent and sequentially consistent storage with feeds, sorting and search
https://github.com/zero-deps/kvs
Highly available distributed strong eventual consistent and sequentially consistent storage with feeds, sorting and search - zero-deps/kvs
- 77Single Page Applications running on the server side.
https://github.com/fomkin/korolev
Single Page Applications running on the server side. - fomkin/korolev
- 78A foundational framework for distributed programming.
https://github.com/reactors-io/reactors
A foundational framework for distributed programming. - reactors-io/reactors
- 79A dimensional analysis library based on dependent types
https://github.com/to-ithaca/libra
A dimensional analysis library based on dependent types - to-ithaca/libra
- 80CSV handling library for Scala
https://github.com/nrinaudo/kantan.csv
CSV handling library for Scala. Contribute to nrinaudo/kantan.csv development by creating an account on GitHub.
- 81MessagePack serializer implementation for Scala / msgpack.org[Scala]
https://github.com/msgpack/msgpack-scala
MessagePack serializer implementation for Scala / msgpack.org[Scala] - msgpack/msgpack-scala
- 82uPickle: a simple, fast, dependency-free JSON & Binary (MessagePack) serialization library for Scala
https://github.com/com-lihaoyi/upickle
uPickle: a simple, fast, dependency-free JSON & Binary (MessagePack) serialization library for Scala - com-lihaoyi/upickle
- 83a simple Scala CLI parsing library
https://github.com/scallop/scallop
a simple Scala CLI parsing library. Contribute to scallop/scallop development by creating an account on GitHub.
- 84Add-on module for Jackson (https://github.com/FasterXML/jackson) to support Scala-specific datatypes
https://github.com/FasterXML/jackson-module-scala
Add-on module for Jackson (https://github.com/FasterXML/jackson) to support Scala-specific datatypes - FasterXML/jackson-module-scala
- 85Type-safe data migration tool for Slick, Git and beyond.
https://github.com/lastland/scala-forklift
Type-safe data migration tool for Slick, Git and beyond. - lastland/scala-forklift
- 86A tidy SQL-based DB access library for Scala developers. This library naturally wraps JDBC APIs and provides you easy-to-use APIs.
https://github.com/scalikejdbc/scalikejdbc
A tidy SQL-based DB access library for Scala developers. This library naturally wraps JDBC APIs and provides you easy-to-use APIs. - scalikejdbc/scalikejdbc
- 87Scala compiler plugin that acts like GNU xgettext command to extract i18n strings in Scala source code files to Gettext .po file
https://github.com/xitrum-framework/scala-xgettext
Scala compiler plugin that acts like GNU xgettext command to extract i18n strings in Scala source code files to Gettext .po file - xitrum-framework/scala-xgettext
- 88REScala - distributed and reactive programming embedded in OO and FP programs.
https://github.com/rescala-lang/REScala
REScala - distributed and reactive programming embedded in OO and FP programs. - rescala-lang/REScala
- 89Scala classpath scanner
https://github.com/xitrum-framework/sclasner
Scala classpath scanner. Contribute to xitrum-framework/sclasner development by creating an account on GitHub.
- 90Iteratees for Cats
https://github.com/travisbrown/iteratee
Iteratees for Cats. Contribute to travisbrown/iteratee development by creating an account on GitHub.
- 91Fast, secure JSON library with tight ZIO integration.
https://github.com/zio/zio-json
Fast, secure JSON library with tight ZIO integration. - zio/zio-json
- 92Schema registry for CSV, TSV, JSON, AVRO and Parquet schema. Supports schema inference and GraphQL API.
https://github.com/indix/schemer
Schema registry for CSV, TSV, JSON, AVRO and Parquet schema. Supports schema inference and GraphQL API. - indix/schemer
- 93Play2.x Authentication and Authorization module
https://github.com/t2v/play2-auth
Play2.x Authentication and Authorization module. Contribute to t2v/play2-auth development by creating an account on GitHub.
- 94Jawn is for parsing jay-sawn (JSON)
https://github.com/typelevel/jawn
Jawn is for parsing jay-sawn (JSON). Contribute to typelevel/jawn development by creating an account on GitHub.
- 95An ONNX (Open Neural Network eXchange) API and backend for typeful, functional deep learning and classical machine learning in Scala 3
https://github.com/EmergentOrder/onnx-scala
An ONNX (Open Neural Network eXchange) API and backend for typeful, functional deep learning and classical machine learning in Scala 3 - EmergentOrder/onnx-scala
- 96Labeled records for Scala based on structural refinement types and macros.
https://github.com/scala-records/scala-records
Labeled records for Scala based on structural refinement types and macros. - scala-records/scala-records
- 97Breeze is a numerical processing library for Scala.
https://github.com/scalanlp/breeze
Breeze is a numerical processing library for Scala. - scalanlp/breeze
- 98Scala Library for Reading Flat File Data (CSV/TSV/XLS/XLSX)
https://github.com/frugalmechanic/fm-flatfile
Scala Library for Reading Flat File Data (CSV/TSV/XLS/XLSX) - frugalmechanic/fm-flatfile
- 99Platform to build distributed, scalable, enterprise-wide business applications
https://github.com/annetteplatform/annette
Platform to build distributed, scalable, enterprise-wide business applications - annetteplatform/annette
- 100Cassovary is a simple big graph processing library for the JVM
https://github.com/twitter/cassovary
Cassovary is a simple big graph processing library for the JVM - twitter/cassovary
- 101A concurrent reactive programming framework.
https://github.com/storm-enroute/reactors
A concurrent reactive programming framework. Contribute to storm-enroute/reactors development by creating an account on GitHub.
- 102Library to register and lookup actors by names in an Akka cluster
https://github.com/xitrum-framework/glokka
Library to register and lookup actors by names in an Akka cluster - xitrum-framework/glokka
- 103:cake: doddle-model: machine learning in Scala.
https://github.com/picnicml/doddle-model
:cake: doddle-model: machine learning in Scala. Contribute to picnicml/doddle-model development by creating an account on GitHub.
- 104A Scala API for Apache Beam and Google Cloud Dataflow.
https://github.com/spotify/scio
A Scala API for Apache Beam and Google Cloud Dataflow. - spotify/scio
- 105A mini Scala utility library
https://github.com/scala-hamsters/hamsters
A mini Scala utility library. Contribute to scala-hamsters/hamsters development by creating an account on GitHub.
- 106Powerful new number types and numeric abstractions for Scala.
https://github.com/typelevel/spire
Powerful new number types and numeric abstractions for Scala. - typelevel/spire
- 107A Persistence Framework for Scala and NoSQL
https://github.com/longevityframework/longevity
A Persistence Framework for Scala and NoSQL. Contribute to longevityframework/longevity development by creating an account on GitHub.
- 108Async lightweight Scala web framework
https://github.com/dvarelap/peregrine
Async lightweight Scala web framework. Contribute to dvarelap/peregrine development by creating an account on GitHub.
- 109CSV Reader/Writer for Scala
https://github.com/tototoshi/scala-csv
CSV Reader/Writer for Scala. Contribute to tototoshi/scala-csv development by creating an account on GitHub.
- 110A Thrift parser/generator
https://github.com/twitter/scrooge
A Thrift parser/generator. Contribute to twitter/scrooge development by creating an account on GitHub.
- 111N-dimensional / multi-dimensional arrays (tensors) in Scala 3. Think NumPy ndarray / PyTorch Tensor but type-safe over shapes, array/axis labels & numeric data types
https://github.com/SciScala/NDScala
N-dimensional / multi-dimensional arrays (tensors) in Scala 3. Think NumPy ndarray / PyTorch Tensor but type-safe over shapes, array/axis labels & numeric data types - SciScala/NDScala
- 112A JSR-310 port of nscala_time
https://github.com/chronoscala/chronoscala
A JSR-310 port of nscala_time. Contribute to chronoscala/chronoscala development by creating an account on GitHub.
- 113Lightweight Scala Dependency Injection Library
https://github.com/scaldi/scaldi
Lightweight Scala Dependency Injection Library. Contribute to scaldi/scaldi development by creating an account on GitHub.
- 114A fault tolerant, protocol-agnostic RPC system
https://github.com/twitter/finagle
A fault tolerant, protocol-agnostic RPC system. Contribute to twitter/finagle development by creating an account on GitHub.
- 115Scala library for accessing various file, batch systems, job schedulers and grid middlewares.
https://github.com/openmole/gridscale
Scala library for accessing various file, batch systems, job schedulers and grid middlewares. - openmole/gridscale
- 116JVM - Java, Kotlin, Scala image processing library
https://github.com/sksamuel/scrimage
JVM - Java, Kotlin, Scala image processing library - sksamuel/scrimage
- 117A group of neural-network libraries for functional and mainstream languages
https://github.com/mrdimosthenis/Synapses
A group of neural-network libraries for functional and mainstream languages - mrdimosthenis/Synapses
- 118Alpakka Kafka connector - Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka.
https://github.com/akka/alpakka-kafka
Alpakka Kafka connector - Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka. - akka/alpakka-kafka
- 119Productivity-oriented collection of lightweight fancy stuff for Scala toolchain
https://github.com/7mind/izumi
Productivity-oriented collection of lightweight fancy stuff for Scala toolchain - 7mind/izumi
- 120Real Time Analytics and Data Pipelines based on Spark Streaming
https://github.com/Stratio/sparta
Real Time Analytics and Data Pipelines based on Spark Streaming - Stratio/sparta
- 121C4E, a JVM friendly library written in Scala for both local and distributed (Spark) Clustering.
https://github.com/Clustering4Ever/Clustering4Ever
C4E, a JVM friendly library written in Scala for both local and distributed (Spark) Clustering. - Clustering4Ever/Clustering4Ever
- 122Scala extensions for Google Guice
https://github.com/codingwell/scala-guice
Scala extensions for Google Guice. Contribute to codingwell/scala-guice development by creating an account on GitHub.
- 123Purely functional genetic algorithms for multi-objective optimisation
https://github.com/openmole/mgo
Purely functional genetic algorithms for multi-objective optimisation - openmole/mgo
- 124A composable command-line parser for Scala.
https://github.com/bkirwi/decline
A composable command-line parser for Scala. Contribute to bkirwi/decline development by creating an account on GitHub.
- 125ABANDONED Pure Scala serialization library with annotations
https://github.com/fomkin/pushka
ABANDONED Pure Scala serialization library with annotations - fomkin/pushka
- 126Modify deeply nested case class fields
https://github.com/softwaremill/quicklens
Modify deeply nested case class fields. Contribute to softwaremill/quicklens development by creating an account on GitHub.
- 127Non-blocking, ultra-fast Scala Redis client built on top of Akka IO, used in production at Livestream
https://github.com/Livestream/scredis
Non-blocking, ultra-fast Scala Redis client built on top of Akka IO, used in production at Livestream - Livestream/scredis
- 128RxScala – Reactive Extensions for Scala – a library for composing asynchronous and event-based programs using observable sequences
https://github.com/ReactiveX/RxScala
RxScala – Reactive Extensions for Scala – a library for composing asynchronous and event-based programs using observable sequences - ReactiveX/RxScala
- 129Asynchronous, Reactive Programming for Scala and Scala.js.
https://github.com/monix/monix
Asynchronous, Reactive Programming for Scala and Scala.js. - monix/monix
- 130Easy way to create Free Monad using Scala macros with first-class Intellij support.
https://github.com/Thangiee/Freasy-Monad
Easy way to create Free Monad using Scala macros with first-class Intellij support. - Thangiee/Freasy-Monad
- 131Eff monad for cats - https://atnos-org.github.io/eff
https://github.com/atnos-org/eff
Eff monad for cats - https://atnos-org.github.io/eff - atnos-org/eff
- 132The missing MatPlotLib for Scala + Spark
https://github.com/vegas-viz/Vegas
The missing MatPlotLib for Scala + Spark. Contribute to vegas-viz/Vegas development by creating an account on GitHub.
- 133Scala extensions for the Kryo serialization library
https://github.com/twitter/chill
Scala extensions for the Kryo serialization library - twitter/chill
- 134Minimal, type-safe RPC Scala library.
https://github.com/yakivy/poppet
Minimal, type-safe RPC Scala library. Contribute to yakivy/poppet development by creating an account on GitHub.
- 135Reactive Microservices for the JVM
https://github.com/lagom/lagom
Reactive Microservices for the JVM. Contribute to lagom/lagom development by creating an account on GitHub.
- 136A scala extension for Project Reactor's Flux and Mono
https://github.com/spring-attic/reactor-scala-extensions
A scala extension for Project Reactor's Flux and Mono - spring-attic/reactor-scala-extensions
- 137Scala testing library with actionable errors and extensible APIs
https://github.com/scalameta/munit
Scala testing library with actionable errors and extensible APIs - scalameta/munit
- 138Scala wrapper for SnakeYAML
https://github.com/jcazevedo/moultingyaml
Scala wrapper for SnakeYAML. Contribute to jcazevedo/moultingyaml development by creating an account on GitHub.
- 139SynapseGrid is a framework for constructing dynamic low latency data flow systems.
https://github.com/Primetalk/SynapseGrid
SynapseGrid is a framework for constructing dynamic low latency data flow systems. - Primetalk/SynapseGrid
- 140Distributed NoSQL Database
https://github.com/stephenmcd/curiodb
Distributed NoSQL Database. Contribute to stephenmcd/curiodb development by creating an account on GitHub.
- 141Abstract Algebra for Scala
https://github.com/twitter/algebird
Abstract Algebra for Scala. Contribute to twitter/algebird development by creating an account on GitHub.
- 142Spark package to "plug" holes in data using SQL based rules ⚡️ 🔌
https://github.com/indix/sparkplug
Spark package to "plug" holes in data using SQL based rules ⚡️ 🔌 - GitHub - indix/sparkplug: Spark package to "plug" holes in data using SQL based rules ⚡️ 🔌
- 143A simple testing framework for Scala
https://github.com/com-lihaoyi/utest
A simple testing framework for Scala. Contribute to com-lihaoyi/utest development by creating an account on GitHub.
- 144Scalable Image Analysis and Shape Modelling
https://github.com/unibas-gravis/scalismo
Scalable Image Analysis and Shape Modelling. Contribute to unibas-gravis/scalismo development by creating an account on GitHub.
- 145Web-based notebook that enables data-driven, interactive data analytics and collaborative documents with SQL, Scala and more.
https://github.com/apache/zeppelin
Web-based notebook that enables data-driven, interactive data analytics and collaborative documents with SQL, Scala and more. - apache/zeppelin
- 146Mutation testing for Scala
https://github.com/stryker-mutator/stryker4s
Mutation testing for Scala. Contribute to stryker-mutator/stryker4s development by creating an account on GitHub.
- 147Streaming MapReduce with Scalding and Storm
https://github.com/twitter/summingbird
Streaming MapReduce with Scalding and Storm. Contribute to twitter/summingbird development by creating an account on GitHub.
- 148A library that toggles Scala code at compile-time, like #if in C/C++
https://github.com/ThoughtWorksInc/enableIf.scala
A library that toggles Scala code at compile-time, like #if in C/C++ - ThoughtWorksInc/enableIf.scala
- 149Casbah is now officially end-of-life (EOL).
https://github.com/mongodb/casbah
Casbah is now officially end-of-life (EOL). Contribute to mongodb/casbah development by creating an account on GitHub.
- 150Build highly concurrent, distributed, and resilient message-driven applications on the JVM
https://github.com/akka/akka
Build highly concurrent, distributed, and resilient message-driven applications on the JVM - akka/akka
- 151A framework to create embedded Domain-Specific Languages in Scala
https://github.com/ThoughtWorksInc/Dsl.scala
A framework to create embedded Domain-Specific Languages in Scala - ThoughtWorksInc/Dsl.scala
- 152Scala library for boilerplate-free, type-safe data transformations
https://github.com/scalalandio/chimney
Scala library for boilerplate-free, type-safe data transformations - scalalandio/chimney
- 153Interactive and Reactive Data Science using Scala and Spark.
https://github.com/spark-notebook/spark-notebook
Interactive and Reactive Data Science using Scala and Spark. - spark-notebook/spark-notebook
- 154TensorFlow API for the Scala Programming Language
https://github.com/eaplatanios/tensorflow_scala
TensorFlow API for the Scala Programming Language. Contribute to eaplatanios/tensorflow_scala development by creating an account on GitHub.
- 155numsca is numpy for scala
https://github.com/botkop/numsca
numsca is numpy for scala. Contribute to botkop/numsca development by creating an account on GitHub.
- 156A cohesive & pragmatic framework of FP centric Scala libraries
https://github.com/frees-io/freestyle
A cohesive & pragmatic framework of FP centric Scala libraries - frees-io/freestyle
- 157Build software better, together
https://github.com/Sciss/ScalaCollider
GitHub is where people build software. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects.
- 158A lightweight, clean and simple JSON implementation in Scala
https://github.com/spray/spray-json
A lightweight, clean and simple JSON implementation in Scala - spray/spray-json
- 159A new Scala wrapper for Joda Time based on scala-time
https://github.com/nscala-time/nscala-time
A new Scala wrapper for Joda Time based on scala-time - nscala-time/nscala-time
- 160Convenient and performant logging library for Scala wrapping SLF4J.
https://github.com/lightbend-labs/scala-logging
Convenient and performant logging library for Scala wrapping SLF4J. - lightbend-labs/scala-logging
- 161Blindsight is a Scala logging API with DSL based structured logging, fluent logging, semantic logging, flow logging, and context aware logging.
https://github.com/tersesystems/blindsight
Blindsight is a Scala logging API with DSL based structured logging, fluent logging, semantic logging, flow logging, and context aware logging. - tersesystems/blindsight
- 162Command Line Interface Scala Toolkit
https://github.com/backuity/clist
Command Line Interface Scala Toolkit. Contribute to backuity/clist development by creating an account on GitHub.
- 163command line options parsing for Scala
https://github.com/scopt/scopt
command line options parsing for Scala. Contribute to scopt/scopt development by creating an account on GitHub.
- 164Schema safe, type-safe, reactive Scala driver for Cassandra/Datastax Enterprise
https://github.com/outworkers/phantom
Schema safe, type-safe, reactive Scala driver for Cassandra/Datastax Enterprise - outworkers/phantom
- 165A Scala API for Cascading
https://github.com/twitter/scalding
A Scala API for Cascading. Contribute to twitter/scalding development by creating an account on GitHub.
- 166The fastest logging library in the world. Built from scratch in Scala and programmatically configurable.
https://github.com/outr/scribe
The fastest logging library in the world. Built from scratch in Scala and programmatically configurable. - outr/scribe
- 167State of the Art Natural Language Processing
https://github.com/JohnSnowLabs/spark-nlp
State of the Art Natural Language Processing. Contribute to JohnSnowLabs/spark-nlp development by creating an account on GitHub.
- 168Essential Building Blocks for Scala
https://github.com/wvlet/airframe
Essential Building Blocks for Scala. Contribute to wvlet/airframe development by creating an account on GitHub.
- 169ZIO — A type-safe, composable library for async and concurrent programming in Scala
https://github.com/zio/zio
ZIO — A type-safe, composable library for async and concurrent programming in Scala - zio/zio
- 170Lightweight, modular, and extensible library for functional programming.
https://github.com/typelevel/cats
Lightweight, modular, and extensible library for functional programming. - typelevel/cats
- 171Scala validation library
https://github.com/jap-company/fields
Scala validation library. Contribute to jap-company/fields development by creating an account on GitHub.
- 172Cask: a Scala HTTP micro-framework
https://github.com/com-lihaoyi/cask
Cask: a Scala HTTP micro-framework. Contribute to com-lihaoyi/cask development by creating an account on GitHub.
- 173Slick extensions for PostgreSQL
https://github.com/tminglei/slick-pg
Slick extensions for PostgreSQL. Contribute to tminglei/slick-pg development by creating an account on GitHub.
- 174First class syntax support for type classes in Scala
https://github.com/typelevel/simulacrum
First class syntax support for type classes in Scala - typelevel/simulacrum
- 175Persist-Json, a Fast Json Parser Written in Scala
https://github.com/nestorpersist/json
Persist-Json, a Fast Json Parser Written in Scala. Contribute to nestorpersist/json development by creating an account on GitHub.
- 176Refinement types for Scala
https://github.com/fthomas/refined
Refinement types for Scala. Contribute to fthomas/refined development by creating an account on GitHub.
- 177Generic programming for Scala
https://github.com/milessabin/shapeless
Generic programming for Scala. Contribute to milessabin/shapeless development by creating an account on GitHub.
- 178Lift Framework
https://github.com/lift/framework
Lift Framework. Contribute to lift/framework development by creating an account on GitHub.
- 179Fast, testable, Scala services built on TwitterServer and Finagle
https://github.com/twitter/finatra
Fast, testable, Scala services built on TwitterServer and Finagle - twitter/finatra
- 180Build software better, together
https://github.com/wireapp/wire-signals
GitHub is where people build software. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects.
- 181The Opinionated RabbitMQ Library for Scala and Akka
https://github.com/SpinGo/op-rabbit
The Opinionated RabbitMQ Library for Scala and Akka - SpinGo/op-rabbit
- 182JSON typeclasses that know the difference between null and absent fields
https://github.com/nrktkt/ninny-json
JSON typeclasses that know the difference between null and absent fields - nrktkt/ninny-json
- 183Scala macros for compile-time generation of safe and ultra-fast JSON codecs + circe booster
https://github.com/plokhotnyuk/jsoniter-scala
Scala macros for compile-time generation of safe and ultra-fast JSON codecs + circe booster - plokhotnyuk/jsoniter-scala
- 184LoMRF is an open-source implementation of Markov Logic Networks
https://github.com/anskarl/LoMRF
LoMRF is an open-source implementation of Markov Logic Networks - anskarl/LoMRF
- 185property based testing library for Scala
https://github.com/scalaprops/scalaprops
property based testing library for Scala. Contribute to scalaprops/scalaprops development by creating an account on GitHub.
- 186Yet another JSON library for Scala
https://github.com/circe/circe
Yet another JSON library for Scala. Contribute to circe/circe development by creating an account on GitHub.
- 187Native Scala mocking framework
https://github.com/paulbutcher/ScalaMock
Native Scala mocking framework. Contribute to paulbutcher/ScalaMock development by creating an account on GitHub.
- 188OAuth 2.0 server-side implementation written in Scala
https://github.com/nulab/scala-oauth2-provider
OAuth 2.0 server-side implementation written in Scala - nulab/scala-oauth2-provider
- 189A small, convenient, dependency-free library for command-line argument parsing in Scala
https://github.com/com-lihaoyi/mainargs
A small, convenient, dependency-free library for command-line argument parsing in Scala - com-lihaoyi/mainargs
- 190Scala + Druid: Scruid. A library that allows you to compose queries in Scala, and parse the result back into typesafe classes.
https://github.com/ing-bank/scruid
Scala + Druid: Scruid. A library that allows you to compose queries in Scala, and parse the result back into typesafe classes. - ing-bank/scruid
- 191akka-persistence-gcp-datastore is a journal and snapshot store plugin for akka-persistence using google cloud firestore in datastore mode.
https://github.com/innFactory/akka-persistence-gcp-datastore
akka-persistence-gcp-datastore is a journal and snapshot store plugin for akka-persistence using google cloud firestore in datastore mode. - GitHub - innFactory/akka-persistence-gcp-datastore: akk...
- 192Mirror of Apache Kafka
https://github.com/apache/kafka
Mirror of Apache Kafka. Contribute to apache/kafka development by creating an account on GitHub.
- 193:leaves: Non-blocking, Reactive MongoDB Driver for Scala
https://github.com/ReactiveMongo/ReactiveMongo
:leaves: Non-blocking, Reactive MongoDB Driver for Scala - ReactiveMongo/ReactiveMongo
- 194Scala GraphQL implementation
https://github.com/sangria-graphql/sangria
Scala GraphQL implementation. Contribute to sangria-graphql/sangria development by creating an account on GitHub.
- 195Functional, stream-based CSV processor for Scala
https://github.com/fingo/spata
Functional, stream-based CSV processor for Scala. Contribute to fingo/spata development by creating an account on GitHub.
- 196ActiveRecord-like ORM library for Scala
https://github.com/aselab/scala-activerecord
ActiveRecord-like ORM library for Scala. Contribute to aselab/scala-activerecord development by creating an account on GitHub.
- 197A Future-free Fs2 native pure FP Redis client
https://github.com/laserdisc-io/laserdisc
A Future-free Fs2 native pure FP Redis client. Contribute to laserdisc-io/laserdisc development by creating an account on GitHub.
- 198Scala framework for building beautiful and maintainable web applications.
https://github.com/UdashFramework/udash-core
Scala framework for building beautiful and maintainable web applications. - UdashFramework/udash-core
- 199Main Portal page for the Jackson project
https://github.com/FasterXML/jackson
Main Portal page for the Jackson project. Contribute to FasterXML/jackson development by creating an account on GitHub.
- 200Library to read, analyze, transform and generate Scala programs
https://github.com/scalameta/scalameta
Library to read, analyze, transform and generate Scala programs - scalameta/scalameta
- 201Compositional, streaming I/O library for Scala
https://github.com/typelevel/fs2
Compositional, streaming I/O library for Scala. Contribute to typelevel/fs2 development by creating an account on GitHub.
- 202The Community Maintained High Velocity Web Framework For Java and Scala.
https://github.com/playframework/playframework
The Community Maintained High Velocity Web Framework For Java and Scala. - playframework/playframework
- 203Scala lightweight, type-safe, asynchronous driver for neo4j
https://github.com/neotypes/neotypes
Scala lightweight, type-safe, asynchronous driver for neo4j - GitHub - neotypes/neotypes: Scala lightweight, type-safe, asynchronous driver for neo4j
- 204Type-safe general-cryptography library - https://jmcardon.github.io/tsec/
https://github.com/jmcardon/tsec
Type-safe general-cryptography library - https://jmcardon.github.io/tsec/ - jmcardon/tsec
- 205JSON library
https://github.com/json4s/json4s
JSON library. Contribute to json4s/json4s development by creating an account on GitHub.
- 206Web & mobile client-side akka-http sessions, with optional JWT support
https://github.com/softwaremill/akka-http-session
Web & mobile client-side akka-http sessions, with optional JWT support - softwaremill/akka-http-session
- 207Lightweight and Nonintrusive Scala Dependency Injection Library
https://github.com/softwaremill/macwire
Lightweight and Nonintrusive Scala Dependency Injection Library - softwaremill/macwire
- 208Rings: efficient JVM library for polynomial rings
https://github.com/PoslavskySV/rings
Rings: efficient JVM library for polynomial rings. Contribute to PoslavskySV/rings development by creating an account on GitHub.
- 209Typesafe, purely functional Computational Intelligence
https://github.com/ciren/cilib
Typesafe, purely functional Computational Intelligence - ciren/cilib
- 210An experimental library for Functional Reactive Programming in Scala
https://github.com/lihaoyi/scala.rx
An experimental library for Functional Reactive Programming in Scala - lihaoyi/scala.rx
- 211New ReactiveCouchbase driver using reactive-streams
https://github.com/ReactiveCouchbase/reactivecouchbase-rs-core
New ReactiveCouchbase driver using reactive-streams - ReactiveCouchbase/reactivecouchbase-rs-core
- 212Simple, safe and intuitive Scala I/O
https://github.com/pathikrit/better-files
Simple, safe and intuitive Scala I/O. Contribute to pathikrit/better-files development by creating an account on GitHub.
- 213Reactive type-safe Scala driver for SQL databases
https://github.com/outworkers/morpheus
Reactive type-safe Scala driver for SQL databases. Contribute to outworkers/morpheus development by creating an account on GitHub.
- 214Lamma schedule generator for Scala is a professional schedule generation library for periodic schedules like fixed income coupon payment, equity deravitive fixing date generation etc.
https://github.com/maxcellent/lamma
Lamma schedule generator for Scala is a professional schedule generation library for periodic schedules like fixed income coupon payment, equity deravitive fixing date generation etc. - GitHub - m...
- 215Tiny High Performance HTTP Server for Scala
https://github.com/analogweb/analogweb-scala
Tiny High Performance HTTP Server for Scala . Contribute to analogweb/analogweb-scala development by creating an account on GitHub.
- 216A test framework that runs everything in parallel.
https://github.com/disneystreaming/weaver-test
A test framework that runs everything in parallel. - GitHub - disneystreaming/weaver-test: A test framework that runs everything in parallel.
- 217Clickhouse Scala Client with Reactive Streams support
https://github.com/crobox/clickhouse-scala-client
Clickhouse Scala Client with Reactive Streams support - crobox/clickhouse-scala-client
- 218Memcached client for Scala
https://github.com/monix/shade
Memcached client for Scala. Contribute to monix/shade development by creating an account on GitHub.
- 219A schema-aware Scala library for data transformation
https://github.com/galliaproject/gallia-core
A schema-aware Scala library for data transformation - galliaproject/gallia-core
- 220Efficient CBOR and JSON (de)serialization in Scala
https://github.com/sirthias/borer
Efficient CBOR and JSON (de)serialization in Scala - sirthias/borer
- 221A purely functional Scala client for CouchDB
https://github.com/beloglazov/couchdb-scala
A purely functional Scala client for CouchDB. Contribute to beloglazov/couchdb-scala development by creating an account on GitHub.
- 222The Play JSON library
https://github.com/playframework/play-json
The Play JSON library. Contribute to playframework/play-json development by creating an account on GitHub.
- 223Image comparison by hash codes
https://github.com/poslegm/scala-phash
Image comparison by hash codes. Contribute to poslegm/scala-phash development by creating an account on GitHub.
- 224Avro schema generation and serialization / deserialization for Scala
https://github.com/sksamuel/avro4s
Avro schema generation and serialization / deserialization for Scala - sksamuel/avro4s
- 225Scala combinator library for working with binary data
https://github.com/scodec/scodec
Scala combinator library for working with binary data - scodec/scodec
- 226Minimal, idiomatic, customizable validation Scala library.
https://github.com/yakivy/dupin
Minimal, idiomatic, customizable validation Scala library. - yakivy/dupin
- 227An implementation of an OAuth2 server designed for mocking/testing
https://github.com/zalando-stups/OAuth2-mock-play
An implementation of an OAuth2 server designed for mocking/testing - zalando-stups/OAuth2-mock-play
- 228A type-safe, reflection-free, powerful enumeration implementation for Scala with exhaustive pattern match warnings and helpful integrations.
https://github.com/lloydmeta/enumeratum
A type-safe, reflection-free, powerful enumeration implementation for Scala with exhaustive pattern match warnings and helpful integrations. - lloydmeta/enumeratum
- 229Optics library for Scala
https://github.com/optics-dev/Monocle
Optics library for Scala. Contribute to optics-dev/Monocle development by creating an account on GitHub.
- 230Scala etcd client implementing V3 APIs
https://github.com/mingchuno/etcd4s
Scala etcd client implementing V3 APIs. Contribute to mingchuno/etcd4s development by creating an account on GitHub.
- 231An asynchronous programming facility for Scala
https://github.com/scala/scala-async
An asynchronous programming facility for Scala. Contribute to scala/scala-async development by creating an account on GitHub.
- 232Accord: A sane validation library for Scala
https://github.com/wix/accord
Accord: A sane validation library for Scala. Contribute to wix-incubator/accord development by creating an account on GitHub.
- 233A data access library for Scala + Postgres.
https://github.com/tpolecat/skunk
A data access library for Scala + Postgres. Contribute to typelevel/skunk development by creating an account on GitHub.
- 234tinylog is a lightweight logging framework for Java, Kotlin, Scala, and Android
https://github.com/tinylog-org/tinylog
tinylog is a lightweight logging framework for Java, Kotlin, Scala, and Android - tinylog-org/tinylog
- 235A purely functional library to build distributed and event-driven systems
https://github.com/parapet-io/parapet
A purely functional library to build distributed and event-driven systems - parapet-io/parapet
- 236Non-blocking, Reactive Redis driver for Scala (with Sentinel support)
https://github.com/etaty/rediscala
Non-blocking, Reactive Redis driver for Scala (with Sentinel support) - etaty/rediscala
- 237Wonderful reusable code from Twitter
https://github.com/twitter/util
Wonderful reusable code from Twitter. Contribute to twitter/util development by creating an account on GitHub.
- 238The Scala API for Quantities, Units of Measure and Dimensional Analysis
https://github.com/typelevel/squants
The Scala API for Quantities, Units of Measure and Dimensional Analysis - typelevel/squants
- 239Squid – type-safe metaprogramming and compilation framework for Scala
https://github.com/epfldata/squid
Squid – type-safe metaprogramming and compilation framework for Scala - epfldata/squid
- 240Principled Functional Programming in Scala
https://github.com/scalaz/scalaz
Principled Functional Programming in Scala. Contribute to scalaz/scalaz development by creating an account on GitHub.
- 241sbt plugin that generates Scala case classes for easy, statically typed and implicit access of JSON data e.g. from API responses
https://github.com/battermann/sbt-json
sbt plugin that generates Scala case classes for easy, statically typed and implicit access of JSON data e.g. from API responses - battermann/sbt-json
- 242Accelerate local LLM inference and finetuning (LLaMA, Mistral, ChatGLM, Qwen, Baichuan, Mixtral, Gemma, Phi, MiniCPM, etc.) on Intel CPU and GPU (e.g., local PC with iGPU, discrete GPU such as Arc, Flex and Max); seamlessly integrate with llama.cpp, Ollama, HuggingFace, LangChain, LlamaIndex, GraphRAG, DeepSpeed, vLLM, FastChat, Axolotl, etc.
https://github.com/intel-analytics/BigDL
Accelerate local LLM inference and finetuning (LLaMA, Mistral, ChatGLM, Qwen, Baichuan, Mixtral, Gemma, Phi, MiniCPM, etc.) on Intel CPU and GPU (e.g., local PC with iGPU, discrete GPU such as Arc,...
- 243Mockito for Scala language
https://github.com/mockito/mockito-scala
Mockito for Scala language. Contribute to mockito/mockito-scala development by creating an account on GitHub.
- 244High-performance SLF4J wrapper for Scala.
https://github.com/Log4s/log4s
High-performance SLF4J wrapper for Scala. Contribute to Log4s/log4s development by creating an account on GitHub.
- 245🔍 Elasticsearch Scala Client - Reactive, Non Blocking, Type Safe, HTTP Client
https://github.com/sksamuel/elastic4s
🔍 Elasticsearch Scala Client - Reactive, Non Blocking, Type Safe, HTTP Client - Philippus/elastic4s
- 246aossie / Agora · GitLab
https://gitlab.com/aossie/Agora/
An Electronic Voting Library implemented in Scala
- 247aossie / Scavenger · GitLab
https://gitlab.com/aossie/Scavenger
A theorem prover based on the conflict resolution calculus
- 248SBT plugin for tweaking various IDE settings
https://github.com/JetBrains/sbt-ide-settings
SBT plugin for tweaking various IDE settings. Contribute to JetBrains/sbt-ide-settings development by creating an account on GitHub.
- 249An HTTP Server and Client library for Scala.
https://github.com/criteo/lolhttp
An HTTP Server and Client library for Scala. Contribute to criteo/lolhttp development by creating an account on GitHub.
- 250Scalafmt · Code formatter for Scala
https://scalameta.org/scalafmt/
Code formatter for Scala
- 251sbt plugin that can check Maven and Ivy repositories for dependency updates
https://github.com/rtimush/sbt-updates
sbt plugin that can check Maven and Ivy repositories for dependency updates - rtimush/sbt-updates
- 252Scala command-line wrapper around ffmpeg, ffprobe, ImageMagick, and other tools relating to media.
https://github.com/outr/media4s
Scala command-line wrapper around ffmpeg, ffprobe, ImageMagick, and other tools relating to media. - outr/media4s
- 253friendly little parsers
https://github.com/tpolecat/atto
friendly little parsers. Contribute to tpolecat/atto development by creating an account on GitHub.
- 254simple combinator-based parsing for Scala. formerly part of the Scala standard library, now a separate community-maintained module
https://github.com/scala/scala-parser-combinators
simple combinator-based parsing for Scala. formerly part of the Scala standard library, now a separate community-maintained module - scala/scala-parser-combinators
Related Articlesto learn about angular.
- 1Introduction to Scala: Beginner’s Guide
- 2Understanding Scala’s Type System: Types and Generics
- 3Functional Programming with Scala
- 4Advanced Functional Programming in Scala: Monads, Functors, and More
- 5Building RESTful APIs with Scala and Akka HTTP: A Beginner’s Guide
- 6Play Framework for Scala Web Development: A Step-by-Step Guide
- 7Concurrency in Scala: Mastering Futures and Promises
- 8Optimizing Scala Performance: Tips for High-Performance Scala Applications
- 9Developing a Scala-based Chat Application: From Concept to Deployment
- 10Creating a Scala-based Data Processing Pipeline: Handling Big Data Efficiently
FAQ'sto learn more about Angular JS.
mail [email protected] to add more queries here 🔍.
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