Kotlin Stdlib API in Typescript

Porting the Kotlin standard library design rationale to typescript. Boost the productivity by using the wise API design.

(WIP: This project is under active development. You are welcome to contribute.)

Getting Started to Contribute

Pick the not-yet-implemented API(below list) and try to create a GitHub issues with the feature template. There is a full check-list for you to contribute this project :). Here is the example.

Getting Started

This module designed to be used in Typescript environment for utilizing strict type-checking and IDE auto-complete experience that similar to Kotlin Development.

If your want to use it in javascript project, I highly recommend you to use a relatively new VSCode feature @ts-check Or Intellij-based IDE to enable type checking.

npm install kt.ts

# OR

yarn add kt.ts

// node >= 11
import 'kt.ts'

const result = [1,2,[3,3]].flatMap(it => it).distinct()

console.log(result)

Kotlin List API

• [x] contains
• [x] elementAt
• [x] elementAtOrElse
• [x] elementAtOrNull
• [x] ~~find~~
• [x] findLast
• [x] first
• [x] first
• [x] firstOrNull
• [x] firstOrNull
• [ ] getOrElse
• [ ] getOrNull
• [ ] indexOf
• [ ] indexOfFirst
• [ ] indexOfLast
• [ ] last
• [ ] last
• [ ] lastIndexOf
• [ ] lastOrNull
• [ ] random
• [ ] single
• [ ] single
• [ ] singleOrNull
• [ ] singleOrNull
• [ ] drop
• [ ] dropLast
• [ ] dropLastWhile
• [ ] dropWhile
• [x] ~~filter~~
• [x] filterIndexed
• [x] filterNot
• [x] filterNotNull
• [ ] slice
• [ ] take
• [ ] takeLast
• [ ] takeLastWhile
• [ ] takeWhile
• [ ] reverse
• [ ] reversed
• [ ] sortBy
• [ ] sortByDescending
• [ ] sortDescending
• [ ] sorted
• [ ] sortedBy
• [ ] sortedByDescending
• [ ] sortedDescending
• [ ] sortedWith
• [ ] associate
• [ ] associateBy
• [ ] associateBy
• [ ] associateWith
• [ ] toSet
• [ ] groupBy
• [ ] groupBy
• [ ] mapIndexed
• [ ] mapIndexedNotNull
• [ ] mapNotNull
• [ ] withIndex
• [x] distinct
• [x] distinctBy
• [ ] intersect
• [ ] subtract
• [ ] union
• [ ] all
• [ ] any
• [ ] any
• [ ] count
• [ ] count
• [ ] fold
• [ ] foldIndexed
• [ ] foldRight
• [ ] foldRightIndexed
• [x] ~~forEach~~
• [x] forEachIndexed
• [ ] max
• [ ] maxBy
• [ ] maxWith
• [ ] min
• [ ] minBy
• [ ] minWith
• [ ] none
• [ ] none
• [ ] onEach
• [ ] reduce
• [ ] reduceIndexed
• [ ] reduceRight
• [ ] reduceRightIndexed
• [ ] sumBy
• [ ] requireNoNulls
• [ ] requireNoNulls
• [ ] chunked
• [ ] chunked
• [ ] minus
• [ ] minus
• [ ] minusElement
• [ ] partition
• [ ] plus
• [ ] plus
• [ ] plusElement
• [ ] windowed
• [ ] windowed
• [ ] zip
• [ ] zip
• [ ] zip
• [ ] zip
• [ ] zipWithNext
• [ ] zipWithNext
• [ ] joinTo
• [ ] joinToString
• [ ] average
• [ ] sum
• [x] containsAll
• [ ] get
• [ ] isEmpty
• [ ] iterator
• [ ] subList
• [x] size
• [ ] lastIndex

Extra for TS and Kotlin-Like API

• [x] filterNotEmpty