Filter Custom filter to remove duplicates (with code)-JS Tutorial-php.cn

Filter Custom filter to remove duplicates (with code)

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Release： 2018-06-06 17:47:20

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This time I bring you Filter custom filter deduplication (with code). What are the precautions for Filter custom filter deduplication? Here is a practical case, let’s take a look.

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title> ng-repeat去除重复</title>
<script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
</head>
<body>
<p ng-app="myApp" ng-controller="myCtrl">
  <p ng-repeat="x in items | unique:&#39;id&#39;">
    {{x.id}}---{{x.name}}
  </p>
</p>
<script>
  //AngularJs 自定义过滤器
  //1.使用过滤器，去除重复
  angular.module('common', []).filter('unique', function () {
    return function (collection, keyname) {
      console.info(collection);
      console.info(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;
    }
  });
  var app = angular.module('myApp', ['common']);
  app.controller('myCtrl', function ($scope) {
    //$scope.items = [1, 2, 3,2];
    //当前unique 的过滤只针对，对象数组过滤
    $scope.items = [
      { id: 1, name: 'zhangsan' },
      { id: 2, name: 'lisi' },
      { id: 1, name: 'zhangsan' },
    ];
  });
</script>
</body>
</html>

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