Guid Generator

guidgen.js

function s4(){
    return Math.floor((1+ Math.random()) * 0x10000)
        .toString(16)
        .substring(1);
}

module.exports ={
    guidWithDash: function() {
        return s4() + s4() + '-' + s4() + '-' + s4() + '-' +
            s4() + '-' + s4() + s4() + s4();
    },
    guid: function() {
        return s4() + s4() + s4() + s4() +
            s4() + s4() + s4() + s4();
    }

};