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JavaScript无引用复制一个Array数组的每一个元素到另一个数组

 5 years ago
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复制数组元素

如果目标数组不存在，可使用 slice/ concat 复制 

var destinationArray = sourceArray.slice();
var destinationArray = sourceArray.concat();

如果目标数组存在，且想保持引用，可使用 push

destinationArray.push.apply(destinationArray, sourceArray);

元素无引用复制

如果数组中对象是object，以上方法复制的数组中的元素，还是相互引用的

var src = [ { name: 'a' }, { name: 'b' } ];

var tar = src.slice();

//更改 arr 中元素

src[0].name = 'c';

console.log(tar[0]);

> { name: "c" }

最简单的方法是使用 JSON 序列化来复制完全独立的数组

var cloneArray = JSON.parse(JSON.stringify(originalArray));

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