How import an utility method (in another file) in client script.

[Doppy]

I need to create a file utility.js with some utility methods and I must use this utility methods in some client scripts.
Suppose to have in a lib(folder) a file utility.js that does this:

'use strict';

var Utils = {};

Utils.getPrint = function() {
    return "hello";
};

module.exports = Utils;

I want use this method in some client scripts but I don't know what I have to do this. I think something like this ( but it doesn't work) :

'use strict';

(function() {
// I must import utils.js file but I don't know how do this. Something like 
var utils=require();
    $(document).ready(function() {


        });


}());

I want avoid to rewrite the same method in every client file it's not the correct solution. Anyone can help me?

[julian]

I'd create a require.js module and define it in the modules section of your plugin.json

define('myplugin/utils', [], function () {
    var Module = {};

    Module.foo = function () { return 'bar'; }

    return Module;
});

Somewhere else...

require(['myplugin/utils'], function (utils) {
    console.log(utils.foo());    // 'bar'
});

and in plugin.json:

...
"modules": {
    "myplugin/utils.js": "relative/path/to/your/utils.js"
}
...