在數組對象

取消複製在$scope.filteredShows的數據是這樣的：在數組對象

[{"id":19,"show_name":"The Walking Dead","show_type":"Series","show_date":"Sun, Feb 26 2017","orig_date":"2017-02-26","season":"7","ep_val":"11","episode":"Season 7, Episode 11","watched":false}, 

{"id":20,"show_name":"The Walking Dead","show_type":"Series","show_date":"Sun, Mar 5 2017","orig_date":"2017-03-05","season":"7","ep_val":"12","episode":"Season 7, Episode 12","watched":false}, 

{"id":21,"show_name":"The Walking Dead","show_type":"Series","show_date":"Sun, Mar 12 2017","orig_date":"2017-03-12","season":"7","ep_val":"13","episode":"Season 7, Episode 13","watched":false}, 

{"id":22,"show_name":"The Walking Dead","show_type":"Series","show_date":"Sun, Mar 19 2017","orig_date":"2017-03-19","season":"7","ep_val":"14","episode":"Season 7, Episode 14","watched":false}]

我使用這個數據使用ng-options來填充select類：

ng-options='show.show_name for show in filteredShows track by show.id'

但也有不止一個因此列出的「行屍走肉」一集在下拉列表中列出了「行屍走肉」4次。我該如何去除這個數組中的重複項？

來源

2017-04-06 J.Do

請參閱[本]（http://stackoverflow.com/a/9229821/3931488）。 –

您是否使用angular-ui？ –

[如何使重複過濾出重複結果]可能的重複（http://stackoverflow.com/questions/15914658/how-to-make-ng-repeat-filter-out-duplicate-results） –

爲什麼不能簡單地構建範圍的新數組僅包括相關數據點...你可以這樣做：

const tmp = {} //Tmp var to store show_name's 
$scope.showsOnly = $scope.filteredShows.filter(s => 
    tmp[s.show_name]?0:(tmp[s.show_name] = 1) 
)

這種過濾所有節目的名字（僅允許show_name的一個實例）。更多信息

_.uniqBy(data ,"show_name")

：

來源

2017-04-06 15:21:33

可以代替試試這個：

ng-options='show.show_name for show in filteredShows track by show.show_name'

或者你可以嘗試_.uniq（）underscore.js的方法

來源

2017-04-06 15:21:26 kaushlendras

如果你正在使用lodash你可以用_.uniqBy（）做到這一點https://lodash.com/docs/4.17.4#uniqBy

來源

2017-04-06 16:01:41 mir

我想你可以嘗試在NG-重複groupBy過濾器。

來源

2017-04-06 16:52:34

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