Simple filter in Angularjs

filter.js

//First we create the filter, is very simple. When you get the input it has all the items from the ngRepeat directive, then you
//iterate all over the array in compare the value with something, if it's right you push it into an output array.
'use strict';

angular.module('appName').filter('filterName', function (Util, Events) {
	return function (input) {
		if(input && input.length > 0){
			var out = [];
			for (var i = 0; i < input.length; i++) {
				var value = input[i].counter;
				
				if(value > 100){
				  out.push(value)
				}else if(value < 50){
				  out.push(value);
				}
			}
			return out;
		}
	};
});

index.html

<!--How to use it-->
<item class="item" ng-repeat="item in items | filterName">
	<h3>{{item.title}}</h3>
	<h4>{{item.description}}</h4>
	<p>{{item.counter}}</p>
</item>