1、普通的深拷贝(对象中不含数组的话,可以使用该方法)
var complex = {persons:['one','two'],age:'20,20,20',arr:[1,4,2]};
console.log(deepCopyObj(complex));
如果含有数组的话,会将数组转为下面这种形式,{0:‘one’,1:'two'}
function deepCopyObj(obj){ var newcopy = {}; if(typeof obj =='object') { for(var key in obj){ console.log(key,obj[key]); newcopy[key] = typeof obj[key] =='object' ? deepCopyObj(obj[key]) : obj[key]; } } return newcopy; }
针对json形式的对象那个,满足两个条件:1、键名是数值 2、添加一个length属性,可以转换成数组
//json对象转为数组 满足两个条件:1、键名是数值 2、添加一个length属性 var arr = [10,20,30]; var copyobj = deepCopyObj(arr); console.log('copyobj',copyobj); //{0:10,1:20,2:30} copyobj.length = 3; //添加length属性 var copeArr = [].slice.call(copyobj,0); //转数组 console.log('copeArr',copeArr); // [10,20,30]
2、改进的方法
function deepCopyAdvanced(obj){ if(obj instanceof Array){ var copy = []; for(var i=0,len=obj.length;i<len;i++){ copy[i] = typeof obj[i] =='object' ? deepCopyAdvanced(obj[i]) : obj[i]; } return copy; }else if(obj instanceof Object){ var copy = {}; for(var key in obj){ copy[key] = typeof obj[key] =='object' ? deepCopyAdvanced(obj[key]) : obj[key]; } return copy; } return obj; }