extJs学习基础4 Ext.each的用法

Ext.onReady(function(){
            //案例一
            /*
            var countries = ['Vietnam', 'Singapore', 'United States', 'Russia'];
            Ext.Array.each(countries, function(name, index, countriesItSelf){
                console.log(name);
                if(name == 'Vietnam'){
                    return false;  //停止循环
                }
            });
            */
            //案例二
            var StudentsJSON = {    
                student:[{    
                    name: '张三',    
                    studentid: 200801,    
                    grade: 80    
                },{    
                    name: '李四',    
                    studentid: 200802,    
                    grade: 90    
                },{    
                    name: '王五',    
                    studentid: 200803,    
                    grade: 90    
                },{    
                    name: '李二麻子',    
                    studentid: 200804,    
                    grade: 90    
                }]    
            };  

            Ext.each(StudentsJSON.student, function(student, index, self){
                console.log(student.name);
                if(student.studentid == '200802'){
                    return false;
                }
            });

        });
    </script>