制作逆转阵列的独立副本在JavaScript中 [英] Making an independent copy of a reversed array in JavaScript

问题描述

下面是我的小提琴： http://jsfiddle.net/sepoto/Zgu9J/1/

我开始有反函数：

function reverseArr(input) {
    var ret = new Array;
    for(var i = input.length-1; i >= 0; i--) {
        ret.push(input[i]);
    }

    //I tried changing the return value to
    //return ret.slice(0) which has no effect on making
    //an independent copy
    return ret;
}

第二个数组我做pointOrigins2不是pointOrigins1的独立副本。换句话说修改pointOrigins2还修改pointOrigins1这不是我所需要达到的。从我在计算器上读我已经尝试了几个选项，比如使用切片或使用for循环然而似乎没有什么可又工作，所以我做了一个小提琴。

The second array I make pointOrigins2 is not an independent copy of pointOrigins1. In other words modifying pointOrigins2 is also modifying pointOrigins1 which is not what I need to achieve. From my reading on StackOverflow I have tried a few options such as using slice or using a for loop however nothing seems to be working yet so I made a fiddle.

有没有一种方法，使扭转数组的独立副本？

Is there a way to make an independent copy of the reversed array?

推荐答案

您正在一个新的独立数组，但你是不是做了填补你的阵列项目的独立副本。你需要做的是这样的：

You are making a new independent array, but you are not making independent copies of the items that fill your arrays. You need to do something like:

function reverseArr(input) {
    var ret = new Array;
    for(var i = input.length-1; i >= 0; i--) {
        ret.push({
            positionx: input[i].positionx, 
            positiony: input[i].positiony, 
            index: input[i].index
        });
    }

    return ret;
}

让你产生新的对象（具有相同的属性），以及新的数组。

so that you are generating new objects (with the same properties) as well as the new array.

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