例如,我有一个数组
["bob", "mary", "steve", "joe", "phil", "mark", "jon"]
我想转移位置2& 3,并将其插入位置4和4之间。 5.结果数组将是:
["bob", "mary", "phil", "steve", "joe", "mark", "jon"]
有没有办法同时移动这两个元素,而不是单独移动,因为最终会花费更多的性能?
答案 0 :(得分:1)
我不确定你对我的优化是什么,但是使用splice就是这样:
var arr = ["bob", "mary", "steve", "joe", "phil", "mark", "jon"];
var x = arr.splice(2,2); //remove the two indexes
var args = [3,0].concat(x); //index where to be added is shifted since we removed indexes
Array.prototype.splice.apply(arr, args); //insert back in
console.log(arr);