AngularJS的ng-show使用

<li class="third-menu" ng-repeat="thirdMenu in secondMenu.thirdMenus" ng-show="thirdMenuFilter(thirdMenu)">
	<a id="thirdMenu{{thirdMenu.id}}" ng-click="clickThirdMenu(thirdMenu)">{{thirdMenu.name}}</a>
</li>

$scope.thirdMenuFilter = function(thirdMenu){
    if ($scope.searchMenuName == null || $scope.searchMenuName == ""){
        return true;
    }
    let flag = thirdMenu.name.indexOf($scope.searchMenuName) >= 0;
    return flag;
}