Sharing [Kotlin code across platforms] is caring! Eugenio Marletti - - PowerPoint PPT Presentation

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Sharing [Kotlin code across platforms] is caring! Eugenio Marletti - - PowerPoint PPT Presentation

Aug 21, 2022 203 likes •551 views

KotlinConf Sharing [Kotlin code across platforms] is caring! Eugenio Marletti @workingkills app app iOS Android frontend backend tools sharing

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@workingkills

Eugenio Marletti

Sharing

[Kotlin code across platforms]

is caring!

KotlinConf

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“app”

“ ”

“ ”

“ ”

“ ”

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“app”

iOS Android frontend backend tools

“ ”

“ ”

“ ”

“ ”

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sharing

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code sharing

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code sharing

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business logic sharing

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bugs sharing

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bugs sharing

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fixes sharing

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effort sharing

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C++ J2ObjC / GWT JavaScript

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THE ALGORITHM™

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THE ALGORITHM™ C++ ObjC++ JavaScript TypeScript

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C++ ObjC++ JavaScript TypeScript iOS !" JavaScriptCore Android !" WebView

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C++ ObjC++ JavaScript TypeScript iOS !" JavaScriptCore Android !" W͊̊̏̃͑̽̃̕ ̘͖̯ ̨̺͇̯ ̶ȩ̧̟̝͔ ͔͎̗̬̼̓̒̄̍̓͐̒̎̕b̡̫̰͙͚͋͋̓́̇͟V͐̇͞ ̓̿̔̿̓ ̚ ͒ ͟ ̨̭̳̱͕ ̵ i ͒̅̉͊̌̇ ̡͓̰̲̳͟ ̥̯ ̯̦ę͕͔͉̜̗͔͎ ̔̍̀̏̌̕ ͢ ͟ w̛͊͆̍͑ ̴̯̯̻̪̦

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? C++ ObjC++ JavaScript TypeScript iOS !" JavaScriptCore Android !"

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THE ALGORITHM™ C++ ObjC++ JavaScript TypeScript Kotlin

@fbecart

Florent Bécart

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multi-platform

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header impl

(before 1.2)

  • Xmulti-platform
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header impl

(before 1.2)

  • Xmulti-platform
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expect actual

(from 1.2)

  • Xmulti-platform
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ANDROID WebView iOS JavaScriptCore BACKEND JS legacy.js

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legacy-test.js ANDROID WebView iOS JavaScriptCore BACKEND JS legacy.js shared-test.kt shared.kt

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legacy-test.js ANDROID WebView iOS JavaScriptCore BACKEND JS legacy.js shared-test.kt shared.kt

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legacy-test.js ANDROID WebView iOS JavaScriptCore BACKEND JS legacy.js shared-test.kt shared.kt

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legacy-test.js ANDROID WebView iOS JavaScriptCore BACKEND JS legacy.js shared.kt shared-test.kt

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legacy-test.js ANDROID WebView iOS JavaScriptCore BACKEND JS shared.kt shared-test.kt JVM

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/** * A day number, offset from 01/01/2012 !" export type Day = number

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/** * A day number, offset from 01/01/2012 !" typealias Day = Int

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class Value { constructor(value: Double) { this.value = value } val value: Double

  • verride fun toString(): String {

return this.value.toString() } companion object { fun add(v1: Value, v2: Value): Value { return Value(v1.value + v2.value) } fun isZero(valueWithVariance: Value): Boolean { return .0 !!% valueWithVariance.value } fun subtract(v1: Value?, v2: Value?): Value { var value = .0 if (v1 !' null !& v2 !' null) { value = v1.value - v2.value } return Value(value) } } } export class Value { constructor(value) { this.value = value } readonly value: number toString() { return String(this.value) } static add = (v1: Value, v2: Value): Value !$ { return new Value(v1.value + v2.value) } static isZero = (valueWithVariance: Value): boolean !$ { return 0 !!% valueWithVariance.value } static subtract = (v1: Value, v2: Value): Value !$ { let value = 0 if (v1 !& v2) { value = v1.value - v2.value } return new Value(value) } }

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< insert more talking here >

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Eugenio Marletti

@workingkills

BIT.LY/SHARING-KOTLIN-IS-CARING