javascript - 如何从键字符串构建嵌套属性

Question

var keys1 = ["foo", "moreFoo"],
value1 = "bar",
keys2 = ["foo", "ultraFoo"],
value2 = "bigBar";

我想创建一个函数来构建一个对象:

object {
foo : {moreFoo: "bar", ultraFoo: "bigBar"}
}

我想采用我的每个数组并执行以下操作:

function recursiveObjectBuild(object, keys, value) {
    var index = 0;
    function loop(object, index) {
        var key = keys[index];
        //Property exists, go into it
        if (key in object) {
            loop(object[key], ++index);
        //Property doesn't exist, create it and go into it
        } else if (index < keys.length-1) {
            object[key] = {};
            loop(object[key], ++index);
        //At last key, set value
        } else {
            object[key] = value;
            return object;
        }
    }
    return loop(object, 0);
}

在我看来，这应该可以工作，但不能(无限循环，一定是一个愚蠢的错误，但看不到它)。

我确信一定有一种更简单的方法

Answer 1

尝试以下操作:

function objectBuild(object, keys, value) {
    for (var i = 0; i < keys.length-1; i++) {
        if (!object.hasOwnProperty(keys[i]))
            object[keys[i]] = {};
        object = object[keys[i]];
    }
    object[keys[keys.length-1]] = value;
}

用法示例(see it in action):

var object = {};
objectBuild(object, ["foo", "moreFoo"], "bar");
objectBuild(object, ["foo", "ultraFoo"], "bigBar");
// object --> {foo: {moreFoo: "bar", ultraFoo: "bigBar}}