of course you could just as easy have done...
//foo module ...
var foo = {...}
module.exports = foo;
//app.js
var foo = require(‘foo’)
all require(‘foo’) with the same library reference will be the same...
the only thing global does is allow multiple versions of libraries not to stomp
on eachother...
//bar module – first to register wins
module.exports = global.__bar__ = global.__bar__ || initModule();
function initModule() {
return {\*...some object...*\};
}
...
which can also be valuable
From: Rick Waldron
Sent: Wednesday, November 27, 2013 11:36 AM
To: [email protected]
Subject: Re: [nodejs] how to create a singleton
On Wednesday, November 27, 2013, Ryan Schmidt wrote:
On Nov 26, 2013, at 23:50, dhtml wrote:
> On Thursday, November 21, 2013 7:13:48 AM UTC-8, Gregg Caines wrote:
>
>> So how do you achieve the same effect in javascript? In the browser, you
have globals.
>
> The global object has nothing to do with web browsers.
Sure it does. In browsers you can reference a global easily from any file. In
node, each file gets its own namespace, so you can’t.
This is simply not true. By default, module code has access to the `global`
object reference, which allows:
// module.js
global.foo = 1;
// program.js
require("./module.js");
console.log(foo); // 1
There is no implicit global environment bindings created for top level var
declarations or function declarations because the source body of module code is
wrapped in an IIFE:
https://github.com/joyent/node/blob/master/src/node.js#L1007-L1014. Which is
not the same as a unique "namespace" and certainly not the same as having a
fresh realm-like global object.
Rick
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