AngularJs Filter自定义过滤器控制ng-repeat去除重复

<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>