如何在angularjs中使用独特的过滤器

Question

如何在angularjs中使用唯一过滤器

$scope.students = [  
   { name: 'Hai', createdBy:'Thomas', createdOn:'09-09-2016' },  
   { name: 'Hal', createdBy:'Thomas', createdOn:'08-09-2016' }, 
   { name: 'Ho', createdBy:'Bob', createdOn:'07-09-2016', modifiedBy:'Alice', modifiedOn:'07-09-2016' },
   { name: 'Hoan', createdBy:'Thomas1', createdOn:'09-09-2016' }, 
   { name: 'Hieu', createdBy:'Bob', createdOn:'10-09-2016', modifiedBy:'Thomas1', modifiedOn:'07-09-2016' },
 ];  

我不希望鲍勃因为鲍勃创作被爱丽丝修改为学生姓名＆＃39; Ho＆＃39; 和Hieu由Thomas1＆＃39;

修改

我预期的最终输出是最后一次更新的唯一名称

鲍勃没有资格获得这份名单好......

Last updatedBy Last updated date 

------------    --------------

Thomas      09-09-2016

Alice       07-09-2016

Thomas1     09-09-2016

Answer 1

试试这个：

caption

JsFiddle链接here

Answer 2

将您的问题陈述改为技术术语：

  

如果修改了记录，则修改器将成为创建者。我如何找到独特的创作者？

其中一个解决方案是：

var students = [  
   { name: 'Hai', createdBy:'Thomas', createdOn:'09-09-2016' },  
   { name: 'Hal', createdBy:'Thomas', createdOn:'08-09-2016' }, 
   { name: 'Ho', createdBy:'Bob', createdOn:'07-09-2016', modifiedBy:'Alice', modifiedOn:'07-09-2016' },
   { name: 'Hoan', createdBy:'Thomas1', createdOn:'09-09-2016' }, 
   { name: 'Hieu', createdBy:'Bob', createdOn:'10-09-2016', modifiedBy:'Thomas1', modifiedOn:'07-09-2016' },
 ]; 

var studentsTemp = JSON.parse(JSON.stringify(students));  //deep copy

var unique = {};
 for(var i = 0; i < studentsTemp.length; i ++){
    if(studentsTemp[i].modifiedBy != null){
        studentsTemp[i].createdBy = studentsTemp[i].modifiedBy;
    }
    unique[studentsTemp[i].createdBy] = studentsTemp[i].createdOn;
 }

 console.log(unique);

将此代码转换为AngularJS过滤器。