我想创建一个更改数组的函数,使顺序保持不变,但索引的位置会发生变化:例如
1, 2, 3, 4, 5
变为
2, 3, 4, 5, 1
我的问题是我得到了一个无限循环,我认为它与代码i != one
有关。此外,代码中i != one
的问题是什么?
var switchArray = function(arrayOne){
//save the original arrayOne[0] with var one
var one = arrayOne[0];
//loop around until i = the original [0]; i originally = one - the length of the array so it equals the last index.
for(var i = arrayOne[arrayOne.length - 1]; i != one;){
// set var b = var i ( the last index of the array)
var b = arrayOne[arrayOne.length - 1];
//delete the last index of the array
arrayOne.pop(arrayOne[arrayOne.length - 1]);
//add var b to the array as the first index
arrayOne.unshift(b);
}
return arrayOne;
}
答案 0 :(得分:1)
您可以在一行中完成:
var array = [1, 2, 3, 4, 5];
array.push(array.shift());
console.log(array); // => [2, 3, 4, 5, 1]
见JSFiddle。