如何知道角[重复]中过滤数组的长度

Question

我有一个搜索栏，让用户过滤基于他们的条目使用角度。现在我希望能够在用户输入的搜索词与数组中的任何内容都不匹配时显示类似“Nothing match your search”的消息。

<input ng-model="search" ng-change="check(search)">
<h4 ng-if="found === 0 ">Nothing matches your search</h4>
<div ng-controller="imCtrl" ng-repeat="imprest in imprests | filter:search">
    <h2>{{imprest.name}}</h2>
</div>

控制器

var office = angular.module('Office');

office.controller('imCtrl',[$scope,function('$scope'){
     $scope.imprests = [
          {name:'John'},
          {name:'Peter'}
     ]

     $scope.check = function (word) {
        var found = 0
        $scope.searching = true
        for (var i = 0; i < $scope.vendorForms.length; i++) {
            if($scope.imprests[i].name.includes(word){
                found++
            } 
        }
        $scope.found = found
        $scope.searching = true
        $scope.done = true
    }
})

是否可以知道过滤数组的长度，以便我可以显示消息？

Answer 1

您可以使用别名：

ng-repeat="imprest in imprests | filter:search as filtered"

然后您可以访问：

{{filtered.length}}