浅拷贝和深拷贝

 var china = {
	  	nation : ‘中国‘,
	  	birthplaces:[‘北京‘,‘上海‘,‘广州‘],
	  	skincolr :‘yellow‘,
	  	friends:[‘sk‘,‘ls‘]
	  }
	  //深复制，要想达到深复制就需要用递归
	  function deepCopy(o,c){
	    var c = c || {}
	    for(var i in o){
	    if(typeof o[i] === ‘object‘){
	  	   	   	  //要考虑深复制问题了
                      if(o[i].constructor === Array){
                    	//这是数组
                    	c[i] =[]
                    }else{
                    	//这是对象
                    	c[i] = {}
                    }
                    deepCopy(o[i],c[i])
	  	   	   }else{
	  	   	   	 c[i] = o[i]
	  	   	   }
	  	   }
	  	   return c
	  }
	  var result = {name:‘result‘}
	  result = deepCopy(china,result)
	  console.dir(result)

 var test ={
	  	name:{
	  	 xing:{ 
	  	     first:‘张‘,
	  	     second:‘李‘
	  	},
	  	ming:‘老头‘
	  },
	  age :40,
	  friend :[‘隔壁老王‘,‘宋经纪‘,‘同事‘]
	 }
	  var result = JSON.parse(JSON.stringify(test))
	  result.age = 30
	  result.name.xing.first = ‘往‘
	  result.friend.push(‘fdagldf;ghad‘)
	  console.dir(test)
	  console.dir(result)