javascript - [JS]更改多级对象值

Question

var obj = {
    a:{
        value: 1
    }
}

var str = 'a.value';

obj[str] = 'work';
console.log(obj);

我有这段代码，我需要使用字符串更改对象的值

Answer 1

递归解决

var obj = {
    a: {
        value: 1
    }
}

var str = 'a.value';

function change(obj, prop, newValue) {
    var a = prop.split('.');
    return (function f(o, v, i) {
        if (i == a.length - 1) {
            o[a[i]] = v;
            return o;
        }
        return f(o[a[i]], v, ++i);
    })(obj, newValue, 0);
}

var result = change(obj, str, 'work');

console.log(JSON.stringify(obj, 0, 2));