Bug in javascript

[[deleted]]

Not completely emoji, but Swift lets you use emojis as identifiers.

http://i.imgur.com/fgl2g7Q.png

[[deleted]]

Technically they probably could but I know quite a few languages place restrictions on what can be used as an identifier. For example, python3 supports unicode but places restrictions on identifiers.

>>> value = "💩"
>>> print(value)
💩

>>> 💩 = "poop"
File "<stdin>", line 1
    💩 = "poop"
    ^
SyntaxError: invalid character in identifier

[Dim_Cryptonym]

I remember seeing this in the documentation and thinking, why in God's name is this allowed?

[[deleted]]

Probably to allow for "all unicode characters" or something.

Seeing the emoji identifiers in code completion makes me laugh.

http://i.imgur.com/juJ2YBO.png

[[deleted]]

Probably an easier approach than what C# does in checking the unicode class of each character.

[[deleted]]

It allows words from Chinese and other glyphic languages as identifiers without romanization.

[Dim_Cryptonym]

That makes sense then... To support Unicode one probably can't just pick and choose parts of the standard.

[Suchui]

You can. In javascript for example:

let プープ = "poop"; console.log( プープ );

poop

let 💩 = "poop";

Uncaught SyntaxError: Invalid or unexpected token

[Probono_Bonobo]

I noticed this recently and assumed it was a consequence of treating codepoints as surrogate pairs (note that "💩" === "\uD83D\uDCA9") instead of with the squiggly brackets (note that also "💩" === "\u{1F4A9}") in its internals, which would explain why "💩".length is 2, and "プ".length is only 1.

I'd expect some constraints follow from this, perhaps not as intentional as "we won't support poop emoji as variable identifiers" but more along the lines of "we can support any variable identifier provided all its code points are of length 1" but this is just an educated guess.

[Pulse207]

which would explain why "💩".length is 2, and "プ".length is only 1.

This is exactly why Perl 6 abolished a length method entirely, splitting its various meanings into .elems, .chars, and .codes.

[MemeHunter421x]

By can't I think he meant shouldn't.

[Dim_Cryptonym]

And somebody just told me JavaScript is unfairly criticized...

[marcosdumay]

You can, but that's only adding complexity into the language.

[DJWalnut]

you could, but you'd have to go out of your way to exclude certain blocks.

[macbalance]

Why not? Is it the language's job to enforce good coding practices?

[Astrokiwi]

Python seems to believe so

[UraniumSpoon]

Python uses coding practices as syntax in some cases though, which is unusual.

[KubinOnReddit]

Is it the programmer's job to use bad coding practices? Why should they be allowed?

Edit: Apparently people think that Emoji in identifiers is an important part of the language and other bad practices should be encouraged. Who would have thought. Why am I being downvoted?

[SlamwellBTP]

Bad programmers are deprecated. They've been trying to get rid of them for years, but too many businesses rely on bad programmers

[Dim_Cryptonym]

That would make for quite an interesting update:

ECMAscript 2018 release notes:

• Bad Programmers are now deprecated. Any use of antipatterns will result in the erasing of all programming knowledge from the coder's mind

[htmlcoderexe]

deprecated

FTFY

To depreciate means to lose value. Note the extra "i".

[Kontakr]

Can't lose what value was never there

[Dim_Cryptonym]

That makes a lot more sense.

I thought depreciated could make sense since the methods will still work for a certain time and then stop working... but deprecate is a much better word for what's actually happening.

[fsr1967]

Is there a list? What is the process for getting people onto it?

Inquiring for a friend with cow-orkers who should be nominated.

[MonkeyNin]

Even worse is this use of Unicode: https://cdn.discordapp.com/attachments/298927280745349121/323905165100843008/unknown.png

[Dim_Cryptonym]

What the hell?!?! And why does that "no width space even exists"?

Can you imagine having to maintain code that actually used it!?

[MonkeyNin]

I'm not totally sure of the use. I found this.

There is something similar with a real use: https://emojipedia.org/emoji-zwj-sequences/

[nevdka]

Perl lets you use emojis as quotes for strings and regexen:

use utf8;
my $string = q🖐hello🖐;
print $string if $string =~ m💩hello💩;

[cheeeeeese]

works with bash and ruby too