AngularJs 删除 ng-repeat 中的重复元素 [英] AngularJs Remove duplicate elements in ng-repeat

问题描述

我有一本字典存储在 field_detail

<li ng-repeat = "field in field_detail">{{field.displayName}}</li>

现在我不想包含重复的 field_detail 的 displayName ，我应该使用什么 filter ?

Now I dont want to include duplicate displayName of field_detail , what filter should I use?

推荐答案

只需创建一个过滤器来获取唯一值，可能是通过一个键.应该做这样的事情(我根本没有测试这个，所以我会把这个事情留给你，这只是给你一个想法):

Just create a filter that gets the unique values, probably by a key. Something like this ought to do (I didn't test this at all, so I'll leave that business to you, this is just to give you an idea):

app.filter('unique', function() {
   return function(collection, keyname) {
      var output = [], 
          keys = [];

      angular.forEach(collection, function(item) {
          var key = item[keyname];
          if(keys.indexOf(key) === -1) {
              keys.push(key);
              output.push(item);
          }
      });

      return output;
   };
});

<div ng-repeat="item in items | unique: 'id'"></div>

注意:Array.indexOf() 在 IE8 中不起作用，所以如果你支持 IE8，你需要在 indexOf() 中存根，或者你需要使用一个方法略有不同.

Note: Array.indexOf() does not work in IE8, so if you're supporting IE8, you'll need to stub in indexOf(), or you'll need to use a slightly different approach.

其他想法:如果您已经在引用这些库，最好创建一个过滤器来利用低破折号或下划线中的独特功能.

Other thoughts: It's probably better just to create a filter that leverages the unique function in lowdash or underscore if you're already referencing those libraries.

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