AngularJs filters

How it is easy to create in AngularJS filter I got to know when I need some special conditions.
I need to filter list of elements like this:


item in ptfs | showFilter: searchCriteria

I created filter called "showFilter" with filter criteria "searchCriteria".

Filter looks like:

App.filter('showFilter', [function($filter) {
   
    function isNotEmpty(obj){
        return obj != null && obj.trim().length > 0;
    }
   
   
    return function(inputArray, searchCriteria){      
       ....
       return data;

     };

}]);


Function returning data is a filtered copy of input data.