Solution for utility functions to be used with underscore.js as mixins or commonjs

clientAndServerUtilFuncs.js

/*
Building a module this way allows you to do this on the client:

    <script src="underscore.js"></script>
    <script src="myutils.js"></script>

Then use it in your code as children of '_' without polluting your global namespace.

    _.myFunction();

And in node.js you can just require the functions themselves like so:

    var myUtilFunctions = require('./myutils');
    myUtilFuncions.myFuncion();

*/


(function () {
    var server = (typeof exports !== 'undefined'),
        _ = this._;    
    
    if (!_ && (typeof require !== 'undefined')) _ = require("underscore")._;
    
    // attach your utility functions to this object
    var pub = {
        myFunction: function () {
            
        }
    }
    
    if (server) {
        module.exports = pub;
    } else {
        _.mixin(pub);
    }
})();