1 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。 2 3 json的删除有很多种,直接用过 delete json对象方式。 4 5 举例如下 6 Js代码 7 var columns = [ 8 {name:"bigTitle",caption:reportData.bigTitle,children:[ 9 {name:"orgName",caption:"组织结构名称",width:100,mode:"string"}, 10 {name:"helpinfo",caption:reportData.columnCaption[0], 11 children:[{name:"workday_month",caption:"工作日数",width:80,mode:"number",format:"#"}, 12 {name:"loggedday_month",caption:"登录天数",width:80,mode:"number",format:"#"}] 13 }, 14 {name:"helpinfo",caption:reportData.columnCaption[1], 15 children:[{name:"workday_week1",caption:"工作日数",width:70,mode:"number",format:"#"}, 16 {name:"loggedday_week1",caption:"登录天数",width:70,mode:"number",format:"#"}] 17 }, 18 {name:"helpinfo",caption:reportData.columnCaption[2], 19 children:[{name:"workday_week2",caption:"工作日数",width:70,mode:"number",format:"#"}, 20 {name:"loggedday_week2",caption:"登录天数",width:70,mode:"number",format:"#"}] 21 }, 22 {name:"helpinfo",caption:reportData.columnCaption[3], 23 children:[{name:"workday_week3",caption:"工作日数",width:70,mode:"number",format:"#"}, 24 {name:"loggedday_week3",caption:"登录天数",width:70,mode:"number",format:"#"}] 25 }, 26 {name:"helpinfo",caption:reportData.columnCaption[4], 27 children:[{name:"workday_week4",caption:"工作日数",width:70,mode:"number",format:"#"}, 28 {name:"loggedday_week4",caption:"登录天数",width:70,mode:"number",format:"#"}] 29 }, 30 {name:"helpinfo",caption:reportData.columnCaption[5], 31 children:[{name:"workday_week5",caption:"工作日数",width:70,mode:"number",format:"#"}, 32 {name:"loggedday_week5",caption:"登录天数",width:70,mode:"number",format:"#"}] 33 } 34 ]} 35 ]; 36 37 根据rtData.columnCaption 判断,如果为null,则删除该节点,不予显示。 38 39 用过 delete columns[0][‘children‘][6]; 40 41 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。 42 43 最后换了个解决方法。 44 45 columns[0][‘children‘].pop(); 46 47 pop()方法表示删除最后一个节点。 48 49 工作日历的要求正好满足该要求,从后递减。 50 51 其他类似的方法有如下: 52 var person={name:"yaoMing",sex:"m",age:"26"}; 53 jsonObj2.persons.push(person);//数组最后加一条记录 54 jsonObj2.persons.pop();//删除最后一项 55 jsonObj2.persons.shift();//删除第一项 56 jsonObj2.persons.unshift(person);//数组最前面加一条记录 57 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! 58 //删除 59 jsonObj2.persons.splice(0,1);//开始位置,删除个数 60 //替换不删除 61 var self={name:"tom",sex:"m",age:"24"}; 62 var brother={name:"Mike",sex:"m",age:"29"}; 63 jsonObj2.persons.splice(1,0,self,brother);//开始位置,删除个数,插入对象 64 //替换并删除 65 var self={name:"tom",sex:"m",age:"24"}; 66 var brother={name:"Mike",sex:"m",age:"29"}; 67 jsonObj2.persons.splice(0,1,self,brother);//开始位置,删除个数,插入对象
时间: 2024-10-10 06:35:38