See John Code - Latest Comments

Re: CoffeeScript: A Love Story?

John Crepezzi — Fri, 16 May 2014 09:19:27 -0000

thanks for the note - will update

Re: CoffeeScript: A Love Story?

SB — Wed, 14 May 2014 04:21:21 -0000

coffescript doesn't always produce js that passes jslint : https://github.com/jashkena...

Re: Using ENUMs with Rails

John Crepezzi — Mon, 12 May 2014 11:59:59 -0000

My current app doesn't really have a good use for them, but I do still think they're interesting for a case like this one. Also check this out if you haven't seen it yet: http://edgeapi.rubyonrails....

Re: Using ENUMs with Rails

Roman — Fri, 09 May 2014 09:29:04 -0000

Hi! Sorry for commenting on 3 years old post, but it'd be cool to know your current experience with enum fields. Do you still use them? Have you met any new disadvantages? Would you still recommend to use them? Thank you!

Re: Copying an Array in JavaScript

objectCloner — Mon, 05 May 2014 16:36:25 -0000

Deep copy for everything
var b = JSON.parse(JSON.stringify(a))

Re: Copying an Array in JavaScript

arrayCloner — Mon, 05 May 2014 16:34:39 -0000

Omg, hope that no one will use such technic in our days. It has huge disadvantage - it will not copy/clone nested arrays or object. All this post could be in one line modern solution that works for everything (objects, array, strings, numbers, etc.):
var b = JSON.parse(JSON.stringify(a))

Re: CoffeeScript: A Love Story?

John Crepezzi — Sat, 22 Feb 2014 09:40:34 -0000

Hmm - if there was an equal sign on the first line that would be true (this output is directly from the coffeescript compiler). Anyway, there was meant to be one in the coffeescript, so I'll update the example - thanks!

Re: CoffeeScript: A Love Story?

Dan Dascalescu — Sat, 22 Feb 2014 00:56:51 -0000

The JavaScript output for square should be:

square = function(x) {
return x * x;
};

Re: Ruby – #tap that!

Mark — Fri, 08 Nov 2013 15:47:06 -0000

Gotcha. I also saw a follow-up article you wrote regarding this. I dig it. :)

Cheers!

Re: Using Ruby’s #tap and #to_proc Together

Mark — Fri, 08 Nov 2013 15:46:29 -0000

Aha! There's an example I can dig. Cheers.

Re: Ruby – #tap that!

John Crepezzi — Fri, 08 Nov 2013 12:34:03 -0000

sure, here's one:

[1, 2, 3].tap(&:compact!).reverse # would error if non-tapped since compact took no action

Re: Ruby – #tap that!

Mark — Fri, 08 Nov 2013 11:26:58 -0000

Hmm. Your examples could easily be re-written as:

object = Model.new.save!


object = SomeClass.new{ |obj| obj.key = 'value'}


# and
[1,2,3].reverse!

All of the examples return the original object, so tap is unnecessary and superfluous—or am I missing the point here? What are some other examples?

Re: Copying an Array in JavaScript

John Crepezzi — Sat, 02 Nov 2013 17:43:46 -0000

That's the appropriate behavior, and what I'd expect (no mistake IMO)..
It'd be weird if this wasn't the case - you want a deep_copy if not

Re: Copying an Array in JavaScript

amdc — Sat, 02 Nov 2013 14:37:56 -0000

Same code, same mistake. This won't clone/copy an array of objects, it'll just copy the reference.
Everyone says OMG USE SLICE ITS AWESOME, but look:

var a = [{a:1, b:2},3]
var b = a.slice();
b[0].a = "WHYYYY";
console.log(a); // → [ { a: 'WHYYYY', b: 2 }, 3 ]
console.log(b); // → [ { a: 'WHYYYY', b: 2 }, 3 ]

Re: Setting up Mocha & JSCoverage

John Crepezzi — Wed, 02 Oct 2013 09:58:42 -0000

I've not personally tried JSCover, but it looks like it should be a compatible output, so you should be able to just substitute it for jscoverage

Re: Setting up Mocha & JSCoverage

David — Wed, 02 Oct 2013 08:19:44 -0000

There's no more new releases for jscoverage, have you tried JSCover to run a test with Mocha?

Re: Setting up Mocha & JSCoverage

John Crepezzi — Thu, 26 Sep 2013 16:23:11 -0000

thanks :)

Re: Setting up Mocha & JSCoverage

Alexander Bykhov — Thu, 26 Sep 2013 07:44:13 -0000

Thanks. Great post! =)

Re: Setting up Mocha & JSCoverage

John Crepezzi — Fri, 02 Aug 2013 14:56:38 -0000

Don't `cd` into the test-cov directory, and you need an environment variable when you call mocha to indicate it should run with the test-cov directory instead of the test directory

Re: Setting up Mocha & JSCoverage

Leonardo Apolonio — Fri, 02 Aug 2013 14:28:40 -0000

dev@ubuntu:~/Documents/test$ jscoverage --no-highlight files/ test-cov/

dev@ubuntu:~/Documents/test$ cd test-cov/

dev@ubuntu:~/Documents/test/test-cov$ mocha -R html-cov > coverage.html

node.js:201

throw e; // process.nextTick error, or 'error' event on first tick

ReferenceError: _$jscoverage is not defined

at Object.<anonymous> (/home/dev/Documents/test/test-cov/test.js:40:7)

at Module._compile (module.js:441:26)

at Object..js (module.js:459:10)

at Module.load (module.js:348:32)

at Function._load (module.js:308:12)

at Module.require (module.js:354:17)

at require (module.js:370:17)

at /usr/local/lib/node_modules/mocha/lib/mocha.js:152:27

at Array.forEach (native)

at Mocha.loadFiles (/usr/local/lib/node_modules/mocha/lib/mocha.js:149:14)

at Mocha.run (/usr/local/lib/node_modules/mocha/lib/mocha.js:306:31)

at Object.<anonymous> (/usr/local/lib/node_modules/mocha/bin/_mocha:339:7)

at Module._compile (module.js:441:26)

at Object..js (module.js:459:10)

at Module.load (module.js:348:32)

at Function._load (module.js:308:12)

at Array.0 (module.js:479:10)

at EventEmitter._tickCallback (node.js:192:41)

Re: Setting up Mocha & JSCoverage

John Crepezzi — Fri, 02 Aug 2013 14:09:44 -0000

I advocate using a Makefile like in the tutorial
What error are you seeing?

Re: Setting up Mocha & JSCoverage

Leonardo Apolonio — Fri, 02 Aug 2013 13:53:25 -0000

i'm trying to run this manually from command line (to possible integrate with jenkins) after "jscoverage test test-cov" where do i run "mocha -R html-cov > coverage.html"? running the command in test-cov throws an error....

Re: Setting up Mocha & JSCoverage

John Crepezzi — Sat, 20 Jul 2013 09:23:02 -0000

I haven't worked specifically with mocha-phantomjs, but I'd imagine those two don't really interact. The command is run from the root of your project directory as long as your lib/ directories are the same as mine - if not, you'll need to update some paths

Re: Setting up Mocha & JSCoverage

Jon — Thu, 18 Jul 2013 10:34:16 -0000

Its a nice example but I'm using mocha-phantomjs, how does this fit in with your testrunner html file which you need to supply when you run mocha-phantomjs? Any ideas? Also which directory do you run the run command from?

Re: Setting up Mocha & JSCoverage

JoshuaToenyes — Sat, 13 Jul 2013 16:50:28 -0000

Thank you! This helped a lot! I love your method of defining an environment variable to modify the require() directory.