从包含密钥路径的字符串中获取json值 [英] Get json value from string containing key path

问题描述

我有一个输入数组，其路径类似于

I have an input array, with path like

var path = ["foo"，"bar"，"baz"];

我有一个对象

var obj = {
    "foo": {
         "bar": {
              "baz": "cake"
         },
         "notbar": {
              "another": "value"
         }
    }
}

我想更改路径中的"baz"值.我知道我可以使用

And i want to change the "baz" value from the path. I know i can use

obj[path[0]][path[1]][path[2]] = "value";

但是我不知道数组会持续多久.php和javascript anwsers都很感谢！

but i dont know how long the array will be. both php and javascript anwsers are appreciated!

推荐答案

在这里，我的不漂亮但有效的解决方案:

Here goes my not pretty but working solution:

function setPropertyByPath(obj, path, value) {
    if(!path || path.length === 0) return;

    var property = path[0];
    for(var i = 1; i < path.length; i++) {
      property += "." + path[i];
    }
    property = "obj." + property + " = \"" + value + "\"";
    eval(property)
}

然后致电

setPropertyByPath(obj, path, "newValue");

这是一个正常工作的 FIDDLE

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