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Changelog History
Page 2

  • v0.24.0 Changes

    March 05, 2015

    ๐Ÿš€ This release adds ExperimentalAPIs to support Experimental/Beta APIs in RxJava, removes def onErrorResumeNext[U >: T](resumeSequence: Observable[U]): Observable[U] โฌ†๏ธ to solve an ambiguity issue when using partial functions, and upgrades RxJava to 1.0.7.


    Now you can import rx.lang.scala.ExperimentalAPIs._ to use some unstable APIs which depends on Experimental/Beta APIs in RxJava. E.g.,

    import rx.lang.scala.Observable
    import rx.lang.scala.ExperimentalAPIs._
    val o1: Observable[Int] = Observable.empty
    val o2 = Observable.just(1, 3, 5)
    val alternate = Observable.just(2, 4, 6)

    ๐Ÿ‘€ See more examples in ExperimentalAPIExamples

    Because the APIs in ExperimentalAPIs depends on unstable APIs in RxJava, if you would like to use a custom RxJava version, ๐Ÿ‘ it's better to check the compatibility in


    ๐Ÿšš def onErrorResumeNext[U >: T](resumeSequence: Observable[U]): Observable[U] is removed to solve an ambiguity issue when using partial functions.

    Now you can use partial functions in onErrorResumeNext. E.g.,

    val o = Observable { (subscriber: Subscriber[Int]) =>
      subscriber.onError(new IOException("Oops"))
    o.onErrorResumeNext {
      case e: IOException => Observable.just(20, 21, 22)
      case _ => Observable.just(10, 11, 12)

    Pull Requests

    • Pull 146 Add ExperimentalObservable
    • Pull 82 Fix onErrorResumeNext partial function ambiguity problem

    Artifacts: Maven Central

  • v0.23.1 Changes

    January 21, 2015

    ๐Ÿš€ This release upgrades RxJava to 1.0.4 along with some enhancements and bug fixes.

    Pull Requests

    • Pull 86 Fix issue #85 that Subscription.isUnsubscribed returns a wrong value
    • Pull 92 Change the parameter name 'func' to 'f'
    • Pull 98 Add toSerialized

    Artifacts: Maven Central

  • v0.23.0 Changes

    December 04, 2014

    ๐Ÿš€ This release upgrades RxJava from 1.0.0-rc.5 to 1.0.2 along with some enhancements and bug fixes.

    ๐Ÿ’ฅ Breaking Changes

    • ๐Ÿ’ฅ Breaking changes in RxJava. Read the RxJava Release Notes for more information.
    • โœ‚ Remove Observable.compose and JavaConversions.toJavaTransformer because Scala has extension methods. It's much nicer than compose.
    • Rewrite toMap in an idiomatic Scala way.
      • Add def to[M[_, _], K, V](keySelector: T => K, valueSelector: T => V)(implicit cbf: CanBuildFrom[Nothing, (K, V), M[K, V]]): Observable[M[K, V]].
      • Remove def toMap[K, V] (keySelector: T => K, valueSelector: T => V, mapFactory: () => Map[K, V]): Observable[Map[K, V]]. In Scala, we can use CanBuildFrom to build a Map instead of mapFactory.
    • Rewrite toMultimap in an idiomatic Scala way.
      • Change the return type from Observable[scala.collection.Map[K, Seq[T]]] to Observable[mutable.MultiMap[K, V]].
      • Change the method name toMultimap to toMultiMap to make it consistent to the return type.
      • Remove toMultimap(keySelector, valueSelector, mapFactory, bufferFactory). You can override MultiMap.makeSet to create your custom bufferFactory Instead.

    ๐Ÿ‘€ See RxScalaDemo.toMapExample โœ… and RxScalaDemo.toMultiMapExample for examples of new toMap and toMultiMap.

    Pull Requests

    • Pull 38 reasons why there is no Observable.range
    • ๐Ÿ— Pull 45 Fail build if not all RxJava methods are mapped to a RxScala equivalent
    • โšก๏ธ Pull 46 Update to RxJava 1.0.0-RC7
    • Pull 48 Doc improvements
    • โšก๏ธ Pull 49 Update to RxJava 1.0.0-RC8
    • ๐Ÿšš Pull 51 remove Observable.compose and JavaConversions.toJavaTransformer
    • โšก๏ธ Pull 52 Update to RxJava 1.0.0-RC9
    • Pull 53 Check the API coverage in examples
    • Pull 54 Convert to nanoseconds for two Duration parameters
    • Pull 56 fix link to examples
    • โ™ป๏ธ Pull 57 Refactor Subscriber to support backpressure when using lift and bug fixes
    • โšก๏ธ Pull 61 Update the Maven link and the Versioning section
    • Pull 64 Fix the misuse of takeWhile in demo
    • โšก๏ธ Pull 65 Update to RxJava 1.0.0-RC12
    • โ™ป๏ธ Pull 67 Refactor toMap
    • โ™ป๏ธ Pull 68 Refactor toMultimap
    • Pull 70 Fix the height issue of the img tags
    • ๐Ÿš‘ Pull 71 Hotfix: Fix CompletenessTest

    Artifacts: Maven Central

  • v0.22.0 Changes

    October 07, 2014

    ๐Ÿš€ This release updates RxScala to use RxJava 1.0.0-rc.5 which included some breaking changes as it approaches 1.0 Final. Read the RxJava Release Notes for more information.

    • โฌ†๏ธ Pull 27 Upgrade to RxJava 1.0.0-RC5
    • ๐Ÿšš Pull 27 Remove groupByUntil
    • โšก๏ธ Pull 27 Update repeatWhen/retryWhen signatures
    • ๐Ÿšš Pull 29 Remove 'parallel' operator
    • Pull 23 Add missing Subject constructors and Subject classes from RxJava to RxScala
    • โœ… Pull 25 Cleanup completeness test by removing parallelMerge obsolete comparison

    Artifacts: Maven Central

  • v0.21.1 Changes

    September 28, 2014

    ๐Ÿš€ The first release after splitting from RxJava into its own top level project RxScala.

    This is the same code as version 0.20.x except:

    • ๐Ÿ—„ all deprecated methods and types are deleted
    • now published to groupId io.reactivex instead of
    • artifactId is now rxscala_2.10 and rxscala_2.11 instead of rxjava-scala

    The artifacts can be found on maven Central at: and

    Artifacts: Maven Central