Node.js 对象合并

var arr = ['a', 'b', 'c', 'd'];var json = {    a: {        f: {            g: {                h: {}            }        },        d: {},    }};var R =  toJSON(arr);R = copy(R,json);console.log(R);function toJSON(arr) {    var value = arr.shift();    var newobj = {};    newobj = newobj[value] || {};    if (arr.length > 0) {        newobj[value] = toJSON( arr);    }    return newobj;}function copy(newobj, obj) {    for (var attr in obj) {        newobj[attr] = newobj[attr] || {};        newobj[attr] = copy(newobj[attr], obj[attr]);    }    newobj = newobj || {};    return newobj;}