- 1.concat() 方法用于连接两个或多个数组。
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
arrayObject.concat(arrayX,arrayX,......,arrayX)
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2.在数组中添加数字
<script type="text/javascript"> var a = [1,2,3]; console.log(a.concat(4,5)); // a = [1,2,3,4,5] </script> -
3.连接两个数组
<script type="text/javascript"> var arr = new Array(3) arr[0] = "1" arr[1] = "2" arr[2] = "3" var arr2 = new Array(3) arr2[0] = "4" arr2[1] = "5" arr2[2] = "6" console.log(arr.concat(arr2))； // [1,2,3,4,5,6] var arr3 = [1,2,3]; var arr4 = [7,8,9]; var arr5 = arr3.concat(arr4) console.log(arr5)； // arr5 = [1, 2, 3, 7, 8, 9] </script>
