Javascript 通过键减少对象

Question

是否有任何 underscorejs 函数(或 native /自定义 js 函数)可以转换此结构:

(请看真实示例@Jsfiddle)

//Simple version, check Jsfiddle for the complete one
var object = {
    "users" : [
        {
            name : "name1"
        },
        {
            name : "name2",
        }
    ]
}

像这样的另一个对象:

//Simple version, check Jsfiddle for the complete one
var object2 = {
    users : {
        name : "name1, name2"
    }
}

Answer 1

这使得与你的 fiddle 相同的对象:

function getType(val){
    if(Object.prototype.toString.call(val) == '[object Array]') return 'array';
    if(val !== null && typeof val === 'object') return 'object';
    return 'other';
}

function deepReduce(object){
    var obj={};
    function travel(object, key, obj){
        if( getType(object) == 'array'){ // if its array, travel
            for(var i=0;i<object.length;i++){
                travel(object[i],key,obj)
            }
        }else if(getType(object)=='object'){ // if its object
            for(var i in object){
                 if(getType(object[i])!='other'){ // if property is object, keep travel
                    if(!obj.hasOwnProperty(i)){
                        obj[i]={};  
                    }
                    travel(object[i],i,obj[i])
                }else{ // else, set property
                    obj[i] =  (obj[i] == undefined ? object[i] : obj[i]+',' + object[i]) ;
                }
            }
        }
    }
    travel(object,null, obj);
    return obj;
}


var reduced=deepReduce(object)
console.log(reduced)

完整 fiddle :http://jsfiddle.net/97g5v5tt/