在Javascript中，如何转换字符串以便可以用来调用属性？ [英] In Javascript, how do I convert a string so it can be used to call a property?

问题描述

所以，我有一个关联数组，数组中的键是对象的属性。我想循环遍历数组，并在每次交互中执行以下操作：

So, I have an associative array and the keys in the array are properties of an object. I want to loop through the array and in each interation do something like this:

Object.key

然而，这不起作用，导致返回undefined而不是属性的值。

This however does not work and results in returning undefined rather than the value of the property.

有没有办法做到这一点？

Is there a way to do this?

推荐答案

你可以使用for ... in循环：

You can use a for ... in loop:

for (var key in obj) {
    //key is a string containing the property name.

    if (!obj.hasOwnProperty(key)) continue;  //Skip properties inherited from the prototype

    var value = obj[key];
}

这篇关于在Javascript中，如何转换字符串以便可以用来调用属性？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！