从字符串路径动态更新 JavaScript 对象 [英] Dynamically updating a JavaScript object from a string path

问题描述

我试图弄清楚是否可以使用字符串作为路径来更新 JavaScript 对象.

Im trying to figure out if its possible to update a JavaScript object, using a string as the path.

在下面的示例中，我试图弄清楚如何使用store>book>0>price 作为我的路径.

In the example below, I'm trying to figure out how I can update the first books price using store>book>0>price as my path.

我知道我可以通过编写 data['store']['book'][0]['price'] 来访问它，但我需要能够动态地做到这一点.我尝试了一些东西，但没有运气.有什么想法吗?

I know I can access this by writing data['store']['book'][0]['price'] but I need to be able to do this dynamically. Ive tried a few things but had no luck. Any Ideas?

这需要适用于任何深度，而不是固定深度

数据:

 var data = { 
      "store": {
        "book": [ 
          { "category": "reference",
            "author": "Nigel Rees",
            "title": "Sayings of the Century",
            "price": 8.95
          },
          { "category": "fiction",
            "author": "Evelyn Waugh",
            "title": "Sword of Honour",
            "price": 12.99
          }
        ],
        "bicycle": {
          "color": "red",
          "price": 19.95
        }
      }
    }
var path = "store>book>0>price"

功能:

function updateObject(object, path, data) {
    var pathArray = path.split(">");
    // Some code here
} 
updateObject(data, path, "10.00");

<小时>

更新

正如 felix 指出的，答案可以在这里找到.JavaScript 对象的动态深度设置

As felix pointed out the answer can be found here. Dynamic deep setting for a JavaScript object

这是我的场景的一个工作示例http://jsfiddle.net/blowsie/Sq8j3/9/

Here is a working example for my scenario http://jsfiddle.net/blowsie/Sq8j3/9/

推荐答案

function updateObject(object, newValue, path){

  var stack = path.split('>');

  while(stack.length>1){
    object = object[stack.shift()];
  }

  object[stack.shift()] = newValue;

}

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