core_node.js it is an utility to load javascript client libs into node code (only methods specified) In this case, the developer wants to use the public/javascript/persons.js lib, that it uses both public/javascript/core.js and public/javascript/i18n (so these others have to been loaded before persons.js)

core_node.js

var fs = require('fs');
exports.load_js_client=function(context, path_lib, method_names, subcontext){
    (function(){
        if(typeof subcontext !== "undefined"){
            for(var v in subcontext){
                this[v]=subcontext[v];
                console.log(v+"="+this[v]);
            }
        }
        eval(fs.readFileSync(path_lib,'utf8'));
        for(var i=0; i<method_names.length; i++){
            context[method_names[i]]=eval(method_names[i]);
        }
    })();
}

load_persons_lib.js

var core=require('./core_node.js');
var path_persons_lib='./public/javascripts/api/persons/model.js';

var path_core_lib='./public/javascripts/api/core/core.js';

var path_i18n_lib='./public/javascripts/api/persons/i18n.js';



var context={};

core.load_js_client(context, path_core_lib, ['getters', 'init']);
core.load_js_client(context, path_i18n_lib, ['date_printer', 'wage_printer']);
core.load_js_client(exports, path_persons_lib, ['webmaster','data_person_example', 'set_locale', 'create_person', 'internationalize', 'invoke_i18n_methods'], context);

test_functionality.js

var $persons=require('./load_persons_lib.js');
log("--------->>>>>>"+$persons.webmaster);

var person=$persons.create_person($persons.data_person_example);