var app = angular.module('app', []);

function getParameterByName(name, string) {

    name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");

    var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),

        results = regex.exec(string);

    return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));

}

app.controller('firstCtrl', function($scope){

 var stringa="/api/project/?currentuser=false&page=2";

 var stringb="/api/project/?page=2";

 $scope.a = getParameterByName('page', stringa);

 $scope.b = getParameterByName('page', stringb);

});