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In Scala 2, an ADT may be defined with: [citation needed] sealed abstract class Tree extends Product with Serializable object Tree { final case object Empty extends Tree final case class Node ( value : Int , left : Tree , right : Tree ) extends Tree }
Scala: Application, general, parallel, distributed, web Yes Yes Yes No Yes Yes Data-oriented programming, metaprogramming De facto standard via Scala Language Specification (SLS) Scheme: Education, general Yes No Yes No No No meta, extensible-syntax De facto 1975-2013, R 0 RS, R 1 RS, R 2 RS, R 3 RS, R 4 RS, R 5 RS, R 6 RS, R 7 RS Small Edition ...
Scala runs on the Java platform (Java virtual machine) and is compatible with existing Java programs. [15] As Android applications are typically written in Java and translated from Java bytecode into Dalvik bytecode (which may be further translated to native machine code during installation) when packaged, Scala's Java compatibility makes it well-suited to Android development, the more so when ...
sbt (originally simple build tool, nowadays stands for nothing [4]) is an open-source build tool which can build Java, Scala, and Kotlin projects.It aims to streamline the procedure of constructing, compiling, testing, and packaging applications, libraries, and frameworks.
Inline vs. prologue – an inline comment follows code on the same line and a prologue comment precedes program code to which it pertains; line or block comments can be used as either inline or prologue
Kotlin (/ ˈ k ɒ t l ɪ n /) [2] is a cross-platform, statically typed, general-purpose high-level programming language with type inference. Kotlin is designed to interoperate fully with Java , and the JVM version of Kotlin's standard library depends on the Java Class Library , but type inference allows its syntax to be more concise.
But languages which emphasize immutable data can make good use of covariant data types. For example, in all of Scala, Kotlin and OCaml the immutable list type is covariant: List [Cat] is a subtype of List [Animal]. Scala's rules for checking variance annotations are essentially the same as C#'s.
Kotlin, however kotlin.native.concurrent.Future is only usually used when writing Kotlin that is intended to run natively [35] Nim; Oxygene; Oz version 3 [36] Python concurrent.futures, since 3.2, [37] as proposed by the PEP 3148, and Python 3.5 added async and await [38] R (promises for lazy evaluation, still single threaded) Racket [39] Raku [40]