JavaScript concat() 方法（JavaScript,concat()方法）- JavaScript

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出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-03-04 浏览: 387 ::

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Definition and Usage
定义与用法

The concat() method is used to join two or more arrays.
使用concat()方法可用来将两个或多个数组结合起来

This method does not change the existing arrays, it only returns a copy of the joined arrays.
这个方法不会改变现存的数组，它只返回了所结合数组的一份拷贝。

arrayObject.concat(arrayX,arrayX,......,arrayX)

Parameter 参数	Description 描述
arrayX	Required. One or more array objects to be joined to an array 必选项。一个或多个数组组合成一个数组

Here we create two arrays and show them as one using concat():
这里我们使用了concat()将两个数组结合成了一个：

<script type="text/javascript">

var arr = new Array(3)
arr[0] = "Jani"
arr[1] = "Tove"
arr[2] = "Hege"

var arr2 = new Array(3)
arr2[0] = "John"
arr2[1] = "Andy"
arr2[2] = "Wendy"

document.write(arr.concat(arr2))

</script>

The output of the code above will be:
上面代码的输出结果为：

Jani,Tove,Hege,John,Andy,Wendy

Here we create three arrays and show them as one using concat():
我们通过使用concat()将三个数组结合成为了一个数组：

<script type="text/javascript">

var arr = new Array(3)
arr[0] = "Jani"
arr[1] = "Tove"
arr[2] = "Hege"

var arr2 = new Array(3)
arr2[0] = "John"
arr2[1] = "Andy"
arr2[2] = "Wendy"

var arr3 = new Array(2)
arr3[0] = "Stale"
arr3[1] = "Borge"

document.write(arr.concat(arr2,arr3))

</script>

The output of the code above will be:
上面代码的结果为：

Jani,Tove,Hege,John,Andy,Wendy,Stale,Borge