javascript：循环对象属性 [英] javascript: loop through object properties

问题描述

我正在动态构建一个对象：

I'm building an object dynamically like this:

scope.filters[scope.col.field] = { value: scope.filterValue, operator: scope.filterOperator };

其中scope.col.field是一个字符串。

where scope.col.field is a string.

那么我如何遍历scope.filters以访问各种属性的值和运算符？

Then how do I loop through scope.filters in order to access value and operator for the various properties ?

推荐答案

以下是一个基本示例：

for (var fieldName in scope.filters) {
    if (!scope.filters.hasOwnProperty(fieldName)) {
        alert(fieldName + ": " + scope.filters[fieldName]);
    }
}

for..in 将遍历对象的所有成员。

for..in will go through all the members of an object.

最佳做法是始终检查变量是否为自己的成员，所以你不要拿起任何其他继承的函数或成员。 这里是一个很好的解释和示例，说明为什么要使用 hasOwnProperty 。

It's a best practice to always check that the variable is its own member, so you don't pick up any other inherited functions or members. Here is a good explanation and example regarding why you should use hasOwnProperty.

我只是设置了一个警报，但显然你可以为每个 fieldName 及其价值。请注意，在这种情况下，您会收到很多警报。

I just set up an alert, but you can obviously do whatever you need with each fieldName and its value. Note, in this case, you'll get a lot of alerts.

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