concat() 方法用于连接两个或多个数组。
arrayObject.concat(arrayX,arrayX,......,arrayX)
该方法不会改变现有的数组,而仅仅会返回被连接数组的一个副本
mya[0] = "1";
mya[1] = "2";
mya[2] = "3";
document.write(mya.concat(4,5)+"");
document.write(mya);
运行结果:
1,2,3,4,5
1,2,3
--------------------------
我们将把 concat() 中的参数连接到数组 a 中:
<script>
var a = [1,2,3];
document.write(a.concat(4,5));
</script>
输出:1,2,3,4,5
---------------------------
我们创建了两个数组,然后使用 concat() 把它们连接起来:
<script>
var arr = new Array(3)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
var arr2 = new Array(3)
arr2[0] = "James"
arr2[1] = "Adrew"
arr2[2] = "Martin"
document.write(arr.concat(arr2))
</script>
输出:
George,John,Thomas,James,Adrew,Martin
-------------------------------------
创建三个数组,然后使用 concat() 把它们连接起来:
<script>
var arr = new Array(3)
arr[0] = "George"
arr[1] = "John"
arr[2] = "Thomas"
var arr2 = new Array(3)
arr2[0] = "James"
arr2[1] = "Adrew"
arr2[2] = "Martin"
var arr3 = new Array(2)
arr3[0] = "William"
arr3[1] = "Franklin"
document.write(arr.concat(arr2,arr3))
</script>
输出:
George,John,Thomas,James,Adrew,Martin,William,Franklin