两行代码搞定js对象深浅拷贝

/**
 * 遍历对象
 * 1.判断是不是原始值
 * 2.判断是数组还是对象
 * 3.建立相应的数组或对象
 * 递归
 */

var obj=
{
    name:"aaa",
    age:23,
    hobby:["basketball","music","coding"],
    lover:{
        name:"aaa",
        age:23,
        hobby:["sleep","movie","eat"]
    }
}
var obj1={};


function deepCopy(origin,target){
    var target=target||{};//容错处理
        for (var i in origin) {
            if(origin.hasOwnProperty(i)){  //避免把原型上的属性遍历出来
                if(typeof origin[i]=="object"){//先判断是引用值
                    if(origin[i] instanceof Array){//判断是数组
                        target[i]=[];
                        deepCopy(origin[i],target[i]);
                    }else{
                        target[i]={}; //判断是对象
                        deepCopy(origin[i],target[i]);
                    }

                }else{//原始值直接赋值
                    target[i]=origin[i];
                }
        }
    }

    return target;//返回拷贝后的对象
}

deepCopy(obj,obj1);
console.log(obj,obj1);

function deepCopy(origin,target){
    for (var i in origin) {
        var target=target||{};
        if(origin.hasOwnProperty(i)){
            //核心代码就两行
            typeof origin[i]=="object"?(origin[i] instanceof Array?deepCopy(origin[i],target[i]=[]):deepCopy(origin[i],target[i]={})):target[i]=origin[i];
        }
    }
    return target;
}

deepCopy(obj,obj1);
console.log(obj,obj1);