程式碼：

<div ng-app="myApp" ng-controller="myCtrl">
    <p ng-repeat="x in items | unique:'id'">
        {{x.id}}---{{x.name}}
    </p>
</div>
<script>
    //AngularJs 自定義過濾器
    //1.使用過濾器，去除重複
    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];
        //當前unique 的過濾只針對，物件陣列過濾
        $scope.items = [
            { id: 1, name: 'zhangsan' },
            { id: 2, name: 'lisi' },
            { id: 1, name: 'zhangsan' },
        ];
    });
</script>