JavaScript的array.forEach自定义按键不灵 [英] Javascript array.forEach with custom keys not working

问题描述

我已动态生成阵列

var userData = new Array();
var userHash = "HashCode123";

// now I push object to that array:
userData[userHash].username = "Ferdo";
userData[userHash].ban = 0;

控制台返回这个值：

Console returning this values:

userData
[] //why this is not array of object(s)?

userData[hash]
Object {username: "Ferdo", ban: 0}

我需要运行 userData.forEach（），但我不能因为数组是空的？谢谢你的帮助。

I need run userData.forEach() but I can't because array is empty? Thank you for help.

推荐答案

的forEach 只遍历元素的数组。唯一属性的属性名称具有一个数值，是0和2之间 ³² -2被认为是该阵列的元素

forEach only iterates over elements of an array. Only properties whose property name has a numeric value that is between 0 and 2³²-2 are considered to be elements of the array.

散列code123不符合这一标准。如果你想随心所欲的钥匙的名字，你可以使用一个对象，并遍历，与其（我如何枚举一个JavaScript对象的属性？）。

"HashCode123" doesn't fulfill this criteria. If you want arbitrary "key" names, you can use an object and iterate over that instead (How do I enumerate the properties of a JavaScript object?).

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