Implemented this variation in a project today, and it was interesting

i don't even know why

createCode: function (amount, currency, password) {
                var deferred = $q.defer();
                var self = this;
                var id = "";
                var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
                for( var i=0; i < 8; i++ )
                    id += possible.charAt(Math.floor(Math.random() * possible.length));
                if (!password || password == '')
                    password = id;