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Thank goodness they have a Code of Conduct for contributors. The people behind this project wouldn't want to put other people down.
They are very proud of their Code of Conduct and Kindness (COCK).
They should be. It's small but effective, proving once again that size doesn't matter.
Careful! You might discourage some young woman from learning about the number 13 with this sexual joke.
My first reaction was, "Haha. That's fun code-as-parody."

Then I looked at the unit tests. [1] Now my reaction is more like, "Your commitment to this bit is both admirable and slightly disturbing."

[1] https://github.com/jezen/is-thirteen/blob/master/test.js

I think that's the point the parody is making. A simple "piece" of code can have thousands of edge cases that a normal developer doesn't think about. That's the advantage of the UNIX-style "everything does one thing and does it well" philosophy that Node mirrors.
You could just as easily read it as a comment on overengineering.
That's what I did anyway...
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We have reached peak npm.
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I think FizzBuzz is far more complex problem than this isThirteen. This FizzbuzzEE solution shows where Java truly shines: powerful dependency management, industry leading design patterns. My only wish is to add parallel streams, lambda and other latest Java 8 feature support.
This was a lot more effective before Github collapsed empty directories.
This library is just what I need for my side project. Hopefully it will be taken up as a standard for other numeric comparisons.
This is a great example of why it is important to use modules. If I were to try implementing this myself, I might have thought to check for the Chinese string "十三", but I doubt I would have known to check for the uppercase version of the Chinese string "拾叄".

More seriously, does anyone know what "uppercase" means in Chinese? Do they literally have two (seemingly unrelated) forms for each of their characters?

Only numerals have upper cases to prevent tampering. For example, you can alter 一(one) to 十(ten) pretty easily, but not 壹 to 拾.
Oh, that actually makes a lot of sense. That also explains why they're used for checkwriting. Thanks!
There is no uppercase character in Chinese.

The Chinese characters are unicode strings.

The answer would be the same about an uppercase emoji.

Chinese only has uppercase numbers (called 大写, lit. "big writing").

I̶ ̶d̶o̶n̶'̶t̶ ̶k̶n̶o̶w̶ ̶w̶h̶y̶,̶ ̶b̶u̶t̶ ̶I̶'̶m̶ ̶h̶a̶r̶d̶l̶y̶ ̶a̶n̶ ̶e̶x̶p̶e̶r̶t̶ ̶i̶n̶ ̶C̶h̶i̶n̶e̶s̶e̶.̶ ̶T̶h̶e̶y̶'̶r̶e̶ ̶n̶o̶t̶ ̶u̶s̶e̶d̶ ̶m̶u̶c̶h̶.

EDIT: Nevermind me, see xiaq's much better comment.

Does anyone know why this breaks the content wrapping? I have seen <pre> classes do this but this text is just normal HN comment class.

I really hope using strikeout unicode does not catch on around here. It is horrible.

Works fine for me (Firefox on Android and Windows)—I think your browser doesn't handle Unicode combining characters properly. (Chrome gets a little funky with them on Android, haven't used Windows Chrome in a while).

The reason is it's two codepoints but one "grapheme", and some software doesn't handle grapheme clusters well.

tap.equal(is('Olivia Wilde').thirteen(), true);

Fellow House fan!

Can't someone do this in about 4 characters of Perl?
Yes, but the "could be interpreted as" operator, colloquially "sleep equals" is pretty obscure and not recommended for production: "thirteen" ~_~ 13
Does this work on IE7?
For more 13 fun, check of the Magic: the Gathering card Triskaidekaphobia. (Specifically, counts in the art and the rules text.)

http://media.wizards.com/2016/aksdjciawolkcc0_soi/en_CMrxVcz...

Isn't MTG a 1v1 game generally? "Each player"?
I think it depends on the format, so cards have to handle the case of many players.

I think there are quite a number of many player formats actually.

Like, in one, some number of packs a cracked, and they are passed around in a circle, each person picking one card, until everyone has a deck, and then they play.

Iirc. (Haven't played it myself.)

It is "each player" since the card can backfire and cause you to lose the game, if your opponent is clever.
unit test for morse code: thirtees?
If he's going to troll like this, shouldn't it have 13 obscure dependencies as well?
Few days too early?

I think it would be better done with 11 though.

"Check if this one goes to..."

I thought this was a parody on pad-left.
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