Angular: Empty Fiddle

http://angularjs.org/

HTML

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.0-rc.2/angular.js"></script>
<div ng-app='myApp' ng-controller="MyCtrl">
    <input ng-required="myArr.length" ng-model="something" />
    <button ng-click="addToArr(something)">Add To Array</button>
    <button ng-click="removeFromArr()">Remove From Array</button>
    {{myArr}}
</div>

JavaScript

var myApp = angular.module('myApp', [])


function MyCtrl($scope) {
    $scope.myArr = [];
    $scope.something = "";
    $scope.addToArr = function(something){
        $scope.myArr.push(something);
    }
    $scope.removeFromArr = function(){
        if($scope.myArr.length>=1)
            $scope.myArr.splice(0,1);
    }
}