[英]JavaScript. Push and read from Multidimensional Array
您必须推送到子数组:
if(!SelectedWindowGraphs[ContainerIDValue])
SelectedWindowGraphs[ContainerIDValue] = [];
SelectedWindowGraphs[ContainerIDValue]
.push(elementID+"chkbox");
// initialize an array at that position in case it has not been defined yet
SelectedWindowGraphs[ContainerIDValue] = (SelectedWindowGraphs[ContainerIDValue] ||
[]);
// push the value at the desired position
SelectedWindowGraphs[ContainerIDValue].push(elementID+"chkbox");
您可以执行以下操作在特定位置添加元素:
var arr = [ 1, 2, 3, 4, 5, 6, 7 ]
arr[2] = "three";
console.log(arr);//[ 1, 2, 'three', 4, 5, 6, 7 ]
在多维数组中:
var arr = [ 1, [2, 3, 4, 5, 6], 7 ]
arr[1][2] = "four";
console.log(arr);//[ 1, [ 2, 3, 'four', 5, 6 ], 7 ]
执行推送时,您将在末尾添加一个或多个元素。
var arr = [1,2,3]
arr.push(4,5);//you are adding 4 and then 5
console.log(arr);//[ 1, 2, 3, 4, 5 ]
在多维数组中:
var arr = [1,2,[3,4]]
arr[2].push(5,6);//position 2
console.log(arr);//[ 1, 2, [ 3, 4, 5, 6 ] ]
要将元素插入特定位置(并向右移动元素n个位置),可以使用splice()
。 在以下情况下,第2位和第3位
var arr = [ 1, 2, 3, 4, 5 ]
arr.splice(2, 0, 999, 8888);
console.log(arr);//[ 1, 999, 8888, 2, 3, 4, 5 ]
在多维数组中:
var arr = [ 1, 2, [3,4,5], 6, 7 ]
arr.splice(2, 0, [8,9,10]);
console.log(arr);//[ 1, 2, [ 8, 9, 10 ], [ 3, 4, 5 ], 6, 7 ]
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.