How to programmatically create URLs with AngularJS

Starting from v1.4 you can use $httpParamSerializer for that:

angular.module('util').factory('urlBuilder', function($httpParamSerializer) {
    function buildUrl(url, params) {
        var serializedParams = $httpParamSerializer(params);

        if (serializedParams.length > 0) {
            url += ((url.indexOf('?') === -1) ? '?' : '&') + serializedParams;
        }

        return url;
    }

    return buildUrl;
});

Usage:

To produce http://url?param1=value1&param2=value2_1&param2=value2_2 call it with:

urlBuilder('http://url', { param1: 'value1', param2: ['value2_1', 'value2_2'] });