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Opereta Spread na Viendeshaji katika JavaScript

Opereta spread hutenganisha kitu chochote, ambacho kina kiendeshaji. Katika kesi hii, kiendeshaji chaguomsingi kitatumika. Hebu tuangalie kwa mfano. Hebu tuseme tuna mkusanyiko Map ufuatao:

let map = new Map(); map.set('a', 1); map.set('b', 2); map.set('c', 3);

Kwa chaguomsingi, wakati wa kutenganisha, patasapat safu mbili-dimensional:

let arr = [...map]; console.log(arr); // [['a', 1], ['b', 2], ['c', 3]]

Ili kupata safu ya funguo, tutatenganisha kiendeshaji kinachofanana:

let arr = [...map.keys()]; console.log(arr); // ['a', 'b', 'c']

Vivyo hivyo tutafanya ili kupata safu ya thamani:

let arr = [...map.values()]; console.log(arr); // [1, 2, 3]

Tenganisha kwa spread kitu kifuatacho:

let obj = { a: 1, b: 2, c: 3, [Symbol.iterator]: function *(){ for (let key in this){ yield this[key]; } } };
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Tunatumia kuki kwa ajili ya uendeshaji wa tovuti, uchambuzi na ubinafsishaji. Usindikaji wa data unafanyika kulingana na Sera ya Faragha.
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