关于json中对象的删除

一个json对象在后台产生了，但是有些数据可能无效或者不合法，所以需要在前台作些例外处理，比如删除掉。
 
json的删除有很多种，直接用过 delete json对象方式。
 
举例如下
Js代码  
var columns = [    
      {name:"bigTitle",caption:reportData.bigTitle,children:[  
    {name:"orgName",caption:"组织结构名称",100,mode:"string"},                                                     
    {name:"helpinfo",caption:reportData.columnCaption[0],  
     children:[{name:"workday_month",caption:"工作日数",80,mode:"number",format:"#"},  
               {name:"loggedday_month",caption:"登录天数",80,mode:"number",format:"#"}]  
    },  
    {name:"helpinfo",caption:reportData.columnCaption[1],  
     children:[{name:"workday_week1",caption:"工作日数",70,mode:"number",format:"#"},  
               {name:"loggedday_week1",caption:"登录天数",70,mode:"number",format:"#"}]  
    },  
    {name:"helpinfo",caption:reportData.columnCaption[2],  
     children:[{name:"workday_week2",caption:"工作日数",70,mode:"number",format:"#"},  
               {name:"loggedday_week2",caption:"登录天数",70,mode:"number",format:"#"}]  
    },   
    {name:"helpinfo",caption:reportData.columnCaption[3],  
     children:[{name:"workday_week3",caption:"工作日数",70,mode:"number",format:"#"},  
               {name:"loggedday_week3",caption:"登录天数",70,mode:"number",format:"#"}]  
    },   
    {name:"helpinfo",caption:reportData.columnCaption[4],  
     children:[{name:"workday_week4",caption:"工作日数",70,mode:"number",format:"#"},  
               {name:"loggedday_week4",caption:"登录天数",70,mode:"number",format:"#"}]  
    },   
    {name:"helpinfo",caption:reportData.columnCaption[5],  
     children:[{name:"workday_week5",caption:"工作日数",70,mode:"number",format:"#"},  
               {name:"loggedday_week5",caption:"登录天数",70,mode:"number",format:"#"}]  
    }  
      ]}     
     ];  
 
根据rtData.columnCaption 判断，如果为null，则删除该节点，不予显示。
 
用过 delete columns[0]['children'][6];
 
无效，报js错误，后来发现 删除确实是删除了，但是最后还遗留了一个逗号，导致IE下报错，查了很多资料无解。
 
最后换了个解决方法。
 
columns[0]['children'].pop();
 
pop()方法表示删除最后一个节点。
 
工作日历的要求正好满足该要求，从后递减。
 
其他类似的方法有如下：
var person={name:"yaoMing",sex:"m",age:"26"};
jsonObj2.persons.push(person);//数组最后加一条记录
jsonObj2.persons.pop();//删除最后一项
jsonObj2.persons.shift();//删除第一项
jsonObj2.persons.unshift(person);//数组最前面加一条记录
只要适合Javascript的方法都是可以用在JSON对象的数组中的！所以还有另外的方法splice( )进行crud操作！
//删除
jsonObj2.persons.splice(0,1);//开始位置,删除个数
//替换不删除
var self={name:"tom",sex:"m",age:"24"};
var brother={name:"Mike",sex:"m",age:"29"};
jsonObj2.persons.splice(1,0,self,brother);//开始位置,删除个数,插入对象
//替换并删除
var self={name:"tom",sex:"m",age:"24"};
var brother={name:"Mike",sex:"m",age:"29"};
jsonObj2.persons.splice(0,1,self,brother);//开始位置,删除个数,插入对象