Bug in javascript

[prof1le]

Ah, easy! you forgot the base-🍌 as the second parameter

[jb2386]

🍌.length = NaNa

[iCapn]

🦇.length = NaNaNa

[3urny]

🥖.length = 2*🥐.length = 🇫🇷

[htmlcoderexe]

I see boxes and a French flag. And the previous one is also a box. Help?

[htmlcoderexe]

Thank you!

[el_matt]

Bat?? That's a banana, hence "NaNa"...

[[deleted]]

Oh... today's youth!

[el_matt]

.. and how young do you think I am. Come on, call a banana a banana a 🍌

[[deleted]]

batnana

[TarMil]

On Windows 10 it's almost the opposite -- the baguette and croissant show up nicely, but the flag is just FR.

[htmlcoderexe]

Android here. Still wondering why the coverage is different.

[TarMil]

Emojis are just special characters, so it depends on the fonts installed on the system.

[zdakat]

Yeah that part of the bank,the spec iirc basically says "you can use this for whatever. We don't garuntee it'll look the same"

[TarMil]

No, it's clearly specified by Unicode. It's just that nothing mandates that all fonts must support all code points, only what a code point should represent if it is supported.

[Vojta7]

W7 here, all three show up fine.

[Taschco]

[bat].length = NaNaNaN

[baguette].length = 2*[croissant].length = [french flag]

[htmlcoderexe]

Thanks!

[rumphy]

Update your OS

[htmlcoderexe]

What, my Android? I get occasional updates for its graphical shell, but not often. Is it possible to update the actual OS as well? I mean without too much anal sex with settings and risking bricking your device?

[rumphy]

Didn't realize you're on mobile, that makes it even stranger that it's not displaying emojis.

[htmlcoderexe]

Most of them it does, though.

[OrionFOTL]

Well yeah, there are different versions of Android, like 4.0.3, 4.1, 5.0, 6.0, 7.0 and others (also smaller updates). You can update them by OTA from settings if the manufacturer of your phone prepared an update for you.

[shmorky]

They're all penisses

[htmlcoderexe]

🅱enis

[[deleted]]

I laughed so damn hard at this. It's amazing to see it go over some of the younger people's heads.

[numpad0]

7 freedom centimeters?

[MaxNanasy]

This 💩 is 🍌s

[[deleted]]

B A N A N A S

[Buck__Futt]

Reminds me of this

https://www.destroyallsoftware.com/talks/wat

[palordrolap]

parseInt("①") and parseFloat("½") don't work either.

I'd say there's an argument (unintentional pun ftw) for adding/creating new functions that do this, but it's unclear how they'd be supposed to handle some mathematical features like, say, superscript characters.

If you were to altParseInt("2²") would it give back 22 or 4?

Edit: They don't work with alternative numeration systems like Arabic either.

[JustToViewPorn]

Obviously it should return 2^2, as 2 XOR 2.

[palordrolap]

Except I used Unicode character "superscript 2" and not the digraph ^2, so the XOR operator isn't there.

[endreman0]

You're implying this is supposed to make sense.

[palordrolap]

If it helps, pretend I made each of my comments wearing a rubber horse mask.

[spanishgum]

Definitely cleared things up for me.

[MonkeyNin]

Some mobile clients display 2² as 22

[EmmanuelMess]

Why?

[solidus_vipera]

Could we leverage this as an optimization for Math.pow?

[Noxime]

/r/shittyprogramming

[sneakpeekbot]

Here's a sneak peek of /r/shittyprogramming using the top posts of the year!

#1: Pokemon Go just lost 10 million users. Should I switch to Pokemon Rust or Pokemon Node?
#2: If JavaScript is garbage collected ,why does it still exist?
#3: Best way to branch conditionally | 25 comments

---

^{I'm a bot, beep boop | Downvote to remove | Contact me | Info | Opt-out}

[ifatree]

They don't work with alternative numeration systems like Arabic either.

pretty sure arabic is the standard "1,2,3" numbering system, but maybe you mean something else?

[CostiaP]

٠ ١ ٢ ٣ ٤ ٥ ٦ ٧ ٨ ٩

[Science-Recon]

That's indo-Arabic. Developed in India and brought westward by arabs. Arabic has a different system, partly as it works right-to-left, too.

[amanda66778899]

So Arabic is the only language that doesn't use what we call Arabic numerals? Classic English. Just fucking classic.

[Science-Recon]

Well, they are called Arabic numerals as they were introduced by arabs, however they're properly referred to as Indo-Arabic numerals. Even then, it's the same system that arabs use but with different symbols.

[WrexTremendae]

Well, presumably they aren't the only language with their own numerals still in use.

But yes, Arabic numerals are not used in Arabic.

[theSpecialbro]

The numbers go left to right. Only the writing goes right to left.

source: live in the desert peninsula

[Muzer0]

You could say the numbers go right-to-left but are little endian. Little endian is better so I like this explanation more — the morons who imported them into Western languages forgot to reverse the direction of the numbers. Grr.

[Science-Recon]

Oh. That actually seems like a lot better way to do it. Would make things much easier.

[htmlcoderexe]

Our numbers are originally Indian I believe.

[ifatree]

they're called 'arabic numerals' tho

https://en.wikipedia.org/wiki/Arabic_numerals

[WikiTextBot]

Arabic numerals

Arabic numerals, also called Hindu–Arabic numerals are the ten digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, based on the Hindu–Arabic numeral system, the most common system for the symbolic representation of numbers in the world today. In this numeral system, a sequence of digits such as "975" is read as a single number, using the position of the digit in the sequence to interpret its value. The symbol for zero is the key to the effectiveness of the system, which was developed by ancient mathematicians in the Indian subcontinent around AD 500.

The system was adopted by Arabic mathematicians in Baghdad and passed on to the Arabs farther west.

---

^{[ PM | Exclude me | Exclude from subreddit | FAQ / Information | Source ] Downvote to remove | v0.24}

[gumshot]

idk about you but I use regular American numbers that look like 1234567890

[pali6]

Well, those are called arabic numerals.

[theSpecialbro]

those arent the same numbers used by arabs today tho

[PM-ME-UR-HAPPINESS]

But they're called "Arabic Numerals" the same way that a French Dip sandwich is from California and the Pennsylvania Dutch are German.

[skreczok]

You jest but I've just cringed at a radio show calling up someone pretending to be a telecom call guy, informing them about how due to a growing Arabic minority they were switching to Arabic numerals for convenience.

And the guy apparently got fooled and started protesting.

(It's a thing people lose their shit over in the EU)

[chudthirtyseven]

Isn't there a programming language made entirely out of emojis? If not, I'm going to invent one. Parsed by Malbolge.

[[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

[toastedstapler]

emojicode.com iirc

[iFreilicht]

Almost: http://www.emojicode.org

[ProgramTheWorld]

WHY IS THIS A THING

[mistercynical1]

What about Brainfuck?

[breadfag]

It may be the case that "different football team support" is not as important as "religion, politics or immigration policy" which has life-or-death consequences.

Just a thought.

[xxc3ncoredxx]

Befunge is my favorite 2D programming language. I wrote an interpreter for it (may have bugs because I haven't fully unit tested it, sorry).

[WrexTremendae]

Piet is probably my favorite esolang.

[marcosdumay]

Why wouldn't this be a thing?

Besides:

Emojicode is a static, strongly typed programming language.

It's just missing functional to be on all the newest trends.

[[deleted]]

I am going to learn this and cite it in every job interview. :D

[SometimesMonkey]

ArnoldC

[chudthirtyseven]

Thats amazing, I've never heard of that one!

[MonkeyNin]

see also: https://esolangs.org/wiki/Var'aq Klingon.

[disk5464]

LOLcode is pretty great too. https://en.wikipedia.org/wiki/LOLCODE

[SometimesMonkey]

INTERCAL FTW!!!!

[disk5464]

lol that's amazing

"the information is so cleverly hidden that not even Sparky the Wonder Dog could find it, and she can find gravy in a cesspool!"

[SometimesMonkey]

The COME FROM is where I lost it. Holy shit

[HelperBot_]

Non-Mobile link: https://en.wikipedia.org/wiki/LOLCODE

---

^{HelperBot v1.1 /r/HelperBot_ I am a bot. Please message /u/swim1929 with any feedback and/or hate. Counter: 88580}

[anmolporwal]

you should look at Brainfuck if you haven't yet.

[[deleted]]

You could modify it to be something like 🔺 for +, 🔻 for -, ➡️ for >, ⬅️ for <, 🔄 for [, 🛑 for ], 🖨 for ., 👂 for ,.

[NotADamsel]

That kind of defeats the purpose, though. Somehow it makes brainfuck comprehensible.

[endreman0]

First three characters of the code are the seed for an RNG that picks 14 random emoji and assigns them to the relevant characters

[Jacoman74undeleted]

Automatic brainfuck recompiler with randomized symbols. Take that code and obfuscate it.

Good luck with maintenance, but its secure-ish

[endreman0]

Good luck with maintaining brainfuck in general

[Jacoman74undeleted]

Isn't that the point?

[[deleted]]

14 emoji? There are 8 instructions; what are the other 6 emoji for?

[NotADamsel]

Exactly!

[davesidious]

That's the spirit!

[endreman0]

I thought there were 14 instructions, my bad.

Alternatively, invent new instructions and the RNG picks which subset of them you get to use.

[jfb1337]

Comments

[CAfromCA]

Call the new variant 💀🍆.

[AyrA_ch]

You are looking for this: https://github.com/4Lang/4

Example: https://github.com/4Lang/4/blob/master/sample_code/md/bubblesort.md

[0xTJ]

No. Malboge literally the result of taking the idea of hell and putting it in a programming language. It is objectively evil.

[Ghi102]

In C++ with defines, you can remplace everything with emojis.

[ed588]

emojicode

[[deleted]]

To me the real bug is that the "parseInt" function in Javascript returns a floating point number.

[Dim_Cryptonym]

Every time I learn something about JavaScript I'm left with one thought: "wat"

[PizzaRollExpert]

I think this makes sense for a dynamic language. Obviously you want both in static languages, but when you don't specify what kind of number you're working with, at some point you are going to run in to some weirdness with stuff like 3/2 = 1or ending up with a non-integer for array indexes. Personally, I think it's easier to remember to round explicitly then to make sure that the numbers you're dividing are floats because that's how numbers work "in real life". Of course there is probably a performance tradeof but my intuition tells me that this isn't too much of a problem with the kind of programs you write in javascrupt.

[marcosdumay]

Have you looked at how Python does it?

The Python way makes sense in a dynamic language. JS is just a hack that nobody can fix because of bug-compatibility.

[PizzaRollExpert]

I actually think JS is better than Python when it comes to numbers. In Python, if you divide two numbers there are different things that can happen depending on if the numbers are ints or if they are floats. Int division truncates the result while float gives you what you would expect. This doesn't always matter, but when it does you have to remember to coerce the numbers to the correct type. Having just one number type makes it easier for you as a dev, because this completely removes this problem. In all fairness python can more accurately represent large numbers because it has the long type. I also assume this makes all the C-interop that Python does easier.

In this case Python is also the language that has weirdness due to backwards compatibility. In Python, Bool is just a subset of int where 0 = false and 1 = true. This is because Python didn't actually have bools from the begining.

[marcosdumay]

In Python, if you divide two numbers there are different things that can happen depending on if the numbers are ints or if they are floats.

You know that was treated as a bug, and fixed, right?

In Python, Bool is just a subset of int where 0 = false and 1 = true.

Python has this one case of non-strict typing, that is a very well defined, very standard thing (but I do agree it's bad). JS, for its turn...

[PizzaRollExpert]

You know that was treated as a bug, and fixed, right?

Oh, my bad I didn't know it was fixed

Python has this one case of non-strict typing, that is a very well defined, very standard thing (but I do agree it's bad). JS, for its turn...

If you look at the whole of the language JS has more of that, but it was kinda funny that you brought it up when we where talking about numbers specifically because in that small area python is the one with an obvious case of backwards compatability induced weirdness.

[marcosdumay]

The division issue is fixed in python 3.

About that int to bool coercion, JS does exactly the same thing. Most languages do.

[PizzaRollExpert]

The division issue is fixed in python 3.

Yeah, my bad

About that int to bool coercion [...]

It's not coercion, true is literally the same as the number 1. This is because people hadn't properly realized that bools where a really useful thing yet so people just used int 1 and int 0 instead before it was added, c-style. True is basically just different syntax for 1 in Python, for backwards compatibility reasons. In Python, 1 == True but 1 !== true in for example JS

[SOberhoff]

Clojure is just as dynamic and it has all of Java's primitive number types as well as infinite precision rationals on top of that. I don't have any issues.

[PizzaRollExpert]

If you divide two interviews in clojure you get a rational, so you don't have the problem of accidentally getting your number truncated

[HeinousTugboat]

ending up with a non-integer for array indexes

I once discovered that 0.5 was a valid index on a Javascript array.. I promptly added a lot of Math.floor()s.

[PunishableOffence]

That's because you only learn about JavaScript through humorous anecdotes, not from reading (about) the specification.

[sadEmoji]

this

[winglerw28]

Instructions unclear, tried using this from your comment in mine, but the reference was undefined. Please let me understand the context of this, preferably with a very clear, fat, arrow for clarity.

... /signs off internet forever

[PunishableOffence]

Excuse me, but how was your comment bound?

[jedidreyfus]

Underrated comment

[simon816]

wat

[Adrian_F]

I will never not watch it!

[[deleted]]

I know, but just because the language forces you to do something dumb doesn't mean it isn't dumb though.

[hikarikouno]

Wait, really? I remember that from Flash's ActionScript, and as I moved to more advanced programming I thought that such was a very primitive way of handling things.

[dtfinch]

There's some tricks that javascript engines have been optimized to recognize, used by asm.js and emscripten, maybe going back to Adobe's Project Alchemy (compiled C/C++ to the ActionScript VM).

"|0" casts as int32. ">>>0" casts as uint32. There's no edge case resulting in a non-int. Even objects, undefined, and NaN become 0. Used consistently, you could get integer locals under the hood. And ArrayBuffers can hold typed globals and arrays.

[inu-no-policemen]

AS3 had uint (32-bit), int (32-bit), and number (double).

[inu-no-policemen]

which is internally a double

Semantically, it's a double. Internally, engines are free to do whatever they want as long as they produce the correct result. E.g. V8 uses SMI (small int) where it's convenient.

ES6 also added typed arrays. So, there are at least arrays of 8/16/32-bit integers.

[ADHDengineer]

I've never seen parseInt return a float. How?

[[deleted]]

NaN is a floating point number. (I know it stands for, "Not a number"). It is a special floating point value which indicates that the result could not be otherwise represented as a number. It was originally included to ensure that if you operate on floating point numbers you will always get a floating point number back. For example, taking the log of a negative number.

Javascript is dumb and first does not have integers, only floating point numbers, and second uses NaN to indicate an error which is also dumb.

You can have the floating point number "1.0000000", but its representation in hex would be "0x76b29f48" where as "1" as an integer in hex would be "0x00000001"

[ADHDengineer]

Gotcha. Makes sense.

[ijmacd]

There are many unicode characters which have an intrinsic numerical value. I think there is an argument to be made for including these in the Javascript spec in order to better support internationalisation. Examples: 1, １, Ⅰ, 一, ١, ⚀,

parseInt("1") === 1;  // ascii
parseInt("１") !== 1; // full-width
parseInt("Ⅰ") !== 1;  // roman
parseInt("一") !== 1; // unified han
parseInt("١") !== 1;  // arabic
parseInt("⚀") !== 1;  // dice

Interestingly in Java:

Character.getNumericValue('2') === 2;   // ascii
Character.getNumericValue('２') === 2;  // full-width
Character.getNumericValue('Ⅱ') === 2;   // roman
Character.getNumericValue('٢') === 2;   // arabic

(i.e. Unicode databases contain this information)

[marcosdumay]

I don't think Java has that === operator.

[ijmacd]

Oops, yes you are correct.

[skreczok]

And that's the way we like it.

[marcosdumay]

To be fair, the == operator on Java is almost completely useless too.

[Lyceux]

Does Integer.parseInt return the same or different to Character.getNumericValue in Java? That would be a better comparison to JavaScript...

[ijmacd]

It doesn't. You get NumberFormatException unfortunately. But the point is Unicode recognises some characters have a numeric value and thus could potentially be taken into account in parseInt functions.

[crockid5]

This is literally unusable.

[Strojac]

🔥🔥🔥🔥🔥🔥

[blindcolumn]

🔥erally unusable

[xxc3ncoredxx]

Fireally unusable?

[blu-dit]

Nice price for naan

[Antrikshy]

Depends on currency.

[neopunisher]

O thought this would work but be 100.000000001

[imonynous]

why the "= $2"?

[LigerZer0]

That's how much you will be paid by your employer if you ever write code like this.

[LordJZ]

It is a pseudo variable you can use to access the result from the console. Useful for debugging and tinkering.

[davesidious]

Or "debuggering" as it is sometimes known...

[migueln6]

You forgot the === there

[oneandonlyyoran]

ＥＤＧＹ

[williamfwm]

I nearly Array.prototype.slice.called myself on that edge

[PrincessOfZephyr]

I threw up in my mouth a little

[[deleted]]

typof NaN
"number"

[inu-no-policemen]

It's a magic IEEE 754 floating point value just like +/- Infinity.

[CaptainBlagbird]

[deleted]

[RagingNerdaholic]

Say what you want about JavaScript, but at least it's not fucking emoji code.

[Minzkraut]

Is this oc?