Ich hätte gern sowas wie ~~~JavaScript let myObject = { array1: [1, 2, 3], array2: [2, 3, 4] }; ~~~ Nur dass sich `array2` aus `array1` berechnen soll: ~~~JavaScript let myObject = { array1: [1, 2, 3], }; myObject.array2 = myObject.array1.map(x => x + 1); ~~~ Kriegt man das irgendwie in das Objektliteral mit rein? ~~~JavaScript, bad let myObject = { array1: [1, 2, 3], array2: myObject.array1.map(x => x + 1) }; ~~~ ergibt: **ReferenceError: can't access lexical declaration `myObject' before initialization**{:@en} ~~~JavaScript, bad let myObject = { array1: [1, 2, 3], array2: array1.map(x => x + 1) }; ~~~ ergibt: **ReferenceError: array1 is not defined**{:@en} ~~~JavaScript, bad let myObject = { array1: [1, 2, 3], array2: this.array1.map(x => x + 1) }; ~~~ ergibt: **TypeError: this.array1 is undefined**{:@en} LLAP 🖖 -- “When UX doesn’t consider *all* users, shouldn’t it be known as ‘*Some* User Experience’ or... SUX? #a11y” —[Billy Gregory](https://twitter.com/thebillygregory/status/552466012713783297)

Ich hätte gern sowas wie ~~~JavaScript let myObject = { array1: [1, 2, 3], array2: [2, 3, 4] } ~~~ Nur dass sich `array2` aus `array1` berechnen soll: ~~~JavaScript let myObject = { array1: [1, 2, 3], } myObject.array2 = myObject.array1.map(x => x + 1); ~~~ Kriegt man das irgendwie in das Objektliteral mit rein? ~~~JavaScript, bad let myObject = { array1: [1, 2, 3], array2: myObject.array1.map(x => x + 1) } ~~~ ergibt: **ReferenceError: can't access lexical declaration `myObject' before initialization**{:@en} ~~~JavaScript, bad let myObject = { array1: [1, 2, 3], array2: array1.map(x => x + 1) } ~~~ ergibt: **ReferenceError: array1 is not defined**{:@en} ~~~JavaScript, bad let myObject = { array1: [1, 2, 3], array2: this.array1.map(x => x + 1) } ~~~ ergibt: **TypeError: this.array1 is undefined**{:@en} LLAP 🖖 -- “When UX doesn’t consider *all* users, shouldn’t it be known as ‘*Some* User Experience’ or... SUX? #a11y” —[Billy Gregory](https://twitter.com/thebillygregory/status/552466012713783297)