Faking a JavaScript "local" context + exporting predefined specific functions.

gistfile1.js

function FakeContext( src ) {
   return (Function( '"use strict";' +
                     "if (this != window) {" +
                     "  for (var __i in this) {" +
                     "    eval( 'var ' + __i + ' = this[ __i ];' );" +
                     "  }" +
                     "}" + 
                     src +
                     "\n" +
                     "if (typeof(initialize) != 'undefined') { this.initialize = initialize; };" +
                     "if (typeof(shutdown) != 'undefined') { this.shutdown = shutdown; };" +
                     "return this;"
                   )
          );
}

var a = FakeContext("console.log('This is a name:', name); function initialize() { console.log('init'); }");
var b = a.apply( { name: "John Doe" } );
b.initialize(); // Running the "exported" function