使用递归读取对象的属性和属性？ [英] reading an object's attributes and properties using recursion?

问题描述

我想知道我是否可以使用递归函数来读取对象的所有属性和属性，包括嵌套属性等。例如，如果我有一个对象，则为
：

I wonder if it would be possible for me to employ a recursive function to read all the attributes and properties of an object including the nested properties and such. for example, if I have an object:

  var mObj = {};
  mObj.countries = [];
  mObj.country = {};
  mObj.country.states = [];
  mObj.country.state = {};
  mObj.country.state = {};

我相信你能得到这张照片。如果它只是一个简单的对象，那么我可以使用for in循环，也许嵌套for in循环，一个对象有许多嵌套级别，然后使用嵌套的for in循环变得有些混乱。我认为使用递归会很棒。任何有助于此的帮助都会受到高度赞赏。

I am sure you get the picture. If it was just a simple object then I can employ "for in" loop, and perhaps nested "for in" loop, an object has numerous nested levels then using nested "for in" loops becomes somewhat chaos. I thought it would wonderful to employ recursion. Any help insight to this would highly appreciated.

谢谢。

推荐答案

这是一个快速示例，可以在您遇到任何问题时执行此操作。

Here's a quick example that does this in case you end up running into any problems.

var level = '';
var readProperties = function(val) {
    if (Object.prototype.toString.call(val) === '[object Object]') {
        for (var propertyName in val) {
            if (val.hasOwnProperty(propertyName)) {
                console.log(level + propertyName + ':');
                level += '  ';
                readProperties(val[propertyName]);
            }
        }
    }
    else {
        console.log(level + val);
        level = level.substring(0, level.length - 2);
    }
}

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