24 lines
559 B
Markdown
24 lines
559 B
Markdown
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---
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title: Combine Two Arrays Using the concat Method
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localeTitle: 使用concat方法组合两个数组
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---
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## 使用concat方法组合两个数组
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* concat方法用于连接两个或多个数组或字符串。
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* 此方法不会改变现有数组，但会返回一个新数组。
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## 解
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```javascript
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function nonMutatingConcat(original, attach) {
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// Add your code below this line
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return original.concat(attach);
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// Add your code above this line
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}
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var first = [1, 2, 3];
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var second = [4, 5];
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nonMutatingConcat(first, second);
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```
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