On Wednesday, November 27, 2013, Michael J. Ryan wrote:
> of course you could just as easy have done...
>
>
Sure, if I was trying to illustrate something that wasn't the thing I was
trying to illustrate. Or if I wanted to confuse my point with something
questionably relevant.
Rick
> //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 <javascript:_e({}, 'cvml',
> '[email protected]');>
> *Sent:* Wednesday, November 27, 2013 11:36 AM
> *To:* [email protected] <javascript:_e({}, 'cvml',
> '[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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