javascript - JavaScript 对象中的深度变化值

Question

我有一个对象，其中包含未知数量的其他对象。每个(子)对象都可能包含字符串形式的 bool 值，我想将它们更改为真正的 bool 值。这是一个示例对象:

var myObj = {
  my1stLevelKey1: "true",
  my1stLevelKey2: "a normal string",
  my1stLevelKey3: {
    my2ndLevelKey1: {
      my3rdLevelKey1: {
        my4thLevelKey1: "true",
        my4thLevelKey2: "false"
      }
    },
    my2ndLevelKey2: {
      my3rdLevelKey2: "FALSE"
    }
  }
}

我最终想要的是这样的:

var myObj = {
  my1stLevelKey1: true,
  my1stLevelKey2: "a normal string",
  my1stLevelKey3: {
    my2ndLevelKey1: {
      my3rdLevelKey1: {
        my4thLevelKey1: true,
        my4thLevelKey2: false
      }
    },
    my2ndLevelKey2: {
      my3rdLevelKey2: false
    }
  }
}

重要的是子对象/级别的数量是未知的。如何使用经典 JavaScript 或 Mootools 有效地做到这一点？

Answer 1

递归是你的 friend

(function (obj) { // IIFE so you don't pollute your namespace
    // define things you can share to save memory
    var map = Object.create(null);
    map['true'] = true;
    map['false'] = false;
    // the recursive iterator
    function walker(obj) {
        var k,
            has = Object.prototype.hasOwnProperty.bind(obj);
        for (k in obj) if (has(k)) {
            switch (typeof obj[k]) {
                case 'object':
                    walker(obj[k]); break;
                case 'string':
                    if (obj[k].toLowerCase() in map) obj[k] = map[obj[k].toLowerCase()]
            }
        }
    }
    // set it running
    walker(obj);
}(myObj));

obj[k].toLowerCase() 是让它不区分大小写