The Nineteenth Byte

12:32 AM

0

Smallest Diversifying Exponent code-golf math A pandigital number is one which contains every digit from 0 to 9 at least once. 1234567890, 1902837465000000, and 9023289761326634265 are all pandigital. A diverse pair of numbers is a pair of numbers \$(a, b)\$ such that \$a^b\$ is pandigital. \$...

Pavel

@ASCII-only Well, C# has both virtual and override and Java has neither

Downgoat

12:47 AM

yeah basically like C# where you have to put override though TIL C# has virtual keyword

Pavel

It does the same thing as C++'s

Quintec

1:08 AM

@Pavel Java has @Override annotation and all methods are virtual by default, you can change this with private/final

Pavel

1:27 AM

@Quintec @Override doesn't actually do anything though.

You can stick it wherever you want

Veskah

return @Override

Οurous

@Veskah ArrayList<@Override>

Bubbler

@Override public @Override Class @Override extends @Override BaseClass @Override implements @Override Interface @Override

Pavel

smh

Veskah

1:45 AM

@Override //smh

Quintec

Java fans unite! Lmfao

@Pavel In seriousness, it's the thought that counts. It's an adequate way of providing documentation. That's the only purpose of override anyway...

Pavel

Actually in C# if you don't use override you can shadow the method in the parent class

Quintec

@Pavel To be honest I never really understood the usefulness of shadowing. I don't understand why the type of variable you store an object in should change what its methods do...

El'endia Starman

2:33 AM

I thought shadowing was just a variable defined in a local scope "covering" that in a larger scope by dint of having the same name.

Is it used particularly often in C# for some reason or another?

Quintec

@El'endiaStarman I think in some languages if you have A.f() and B.f() with B extends A then B.f() will call the version in B if it's stored in a variable of type B, and the version in A if it's stored in a variable of type A

El'endia Starman

Well, I know that happens in Python. In fact, that's pretty much the way to override base implementations in the parent class.

Quintec

@El'endiaStarman On the other hand, polymorphism in Java is based on the fact that this doesn't happen.

So you can have for (Animal a : list) {a.speak();} and have dogs bark and cats meow

El'endia Starman

@Quintec Polymorphism is one of those words I need explained to me over and over again because I don't use/remember it. Explain please? (Not only polymorphism but how that relates to Java and inheritance or lack thereof of class methods in Java.)

Downgoat

3:17 AM

@Bubbler wait wtf would this seriously compile

dzaima

4:58 AM

@Pavel ok what

Pavel

@dzaima What I meant was, annotations in Java don't affect the way your code is compiled. The presence or absence of @override in any spot you could stick @override doesn't matter.

dzaima

@Pavel compiled code yes, compiling code no.

Pavel

No it doesn't matter

dzaima

@Pavel what?

Pavel

THE POINT IS @Override is a glorified comment

dzaima

5:04 AM

@Pavel yeah, but isn't so c#s? (well except for the fact that it allows shadowing which is just horrible)

and what more would you expect from @Override?

Pavel

No C#'s Override actually matters

If you remove it your program will function differently

dzaima

@Pavel which is horrible imo

Pavel

It's useful when you're extending a class from some library and you don't want to care about what its methods are called when you're writing your class

You probably wouldn't want to make shadowing methods public though

Jo King

6:24 AM

is there a language with an OEIS built-in?

lirtosiast

No

Pavel

Probably

lirtosiast

I'm trying to write one for Sledgehammer, and I need to scrape the OEIS website for the Mathematica code

The OEIS package only gives you terms of the sequence already calculated by OEIS

@Pavel The reason I doubt it is because we haven't seen it on oeis questions here

Pavel

Well it's a standard loophole

lirtosiast

What is?

Pavel

6:28 AM

You can't check the internet

lirtosiast

I'm planning to do it beforehand and include all the code I download in the interpreter

Pavel

kek

Adám

6:47 AM

> Only Classic.

BMO

7:02 AM

@JoKing github.com/stestoltz/cQuents

@lirtosiast What about sequences which aren't computable? I think oeis has some of them too

48133670: if implemented

Leaky Nun

7:32 AM

is it possible to set upstream branch in github desktop?

maxb

8:23 AM

@LeakyNun Is it a one-time occasion, or do you want to lean how to?

Leaky Nun

the latter

maxb

@LeakyNun In that case I can't help you unfortunately, I'm a sucker for the command line

Leaky Nun

I know how to do it in git

but I'm asking about github desktop

New Main Posts

0

Q: A game of dice, but avoid number 6

I was invited to play a game of dice which I had never heard of. The rules were simple, yet I think it would be perfect for a KotH challenge. The rules The start of the game The die goes around the table, and each time it is your turn, you get to throw the die as many times as you want. Howe...

maxb

8:42 AM

Time to get started with your bots! In the end, I decided to go with Python only, but I'm hoping that won't deter you! I'll start a new chat room for the challenge where you can ask all your questions.

dzaima

@Pavel i feel like doing that would introduce many horrible bugs everywhere

lirtosiast

11:23 AM

@BMO I won't even try to implement any OEIS sequence without Mathematica code on the OEIS website, excepting the few I will write myself

The whole idea is far off anyway

Adám

11:55 AM

Is it bad practice to have long "staircases" in one's code? I am working on a function that ends with:

                         :EndIf
                     :EndIf
                 :EndIf
             :EndIf
         :EndIf
     :EndIf
 :EndIf

2

ASCII-only

don't think so

@Adám even if that happens usually it's either 1. a newbie programmer or 2. something the language just isn't designed to handle imo

@lirtosiast :|

Adám

@ASCII-only Please edit in a ping!

ASCII-only

@Adám ? oh oops

Adám

@ASCII-only That message, even if…imo, was that to me or lirtosiast?

Emigna

@Adám According to many, having more than 1 or 2 levels of indentation means that you have done something wrong. At least in OO-programming

Adám

12:00 PM

@ASCII-only Hm. I am checking a lot of potential problems, and for each problem, if it occurs, return an appropriate message, else continue by checking for the next potential problem.

I just realised I probably can change :Else followed by :If to :ElseIf. Doh.

maxb

@Adám I would actually argue that it could be bad practice. It's hard to know for sure without seeing the rest of the code, but having a lot of branching within the same method could lead to problems when debugging or unit testing. If possible, I'd separate the method into several smaller methods that handle separate cases.

I'm not saying that every if-statement should have its separate method, but your method posted above ends in 7 :EndIfs, meaning that there are up to 2^7 = 128 (hopefully way fewer, possibly more) possible outcomes of your method. If someone else inherits your code, they'd have to wrap their head around all of that at the same time, which could be troublesome

Adám

12:16 PM

@maxb Uh, I don't get it. The :Ifs are nested, so there are only 8 outcomes. 7 error messages and 1 success.

Jo King

@Adám Does the language have any sort of switch case construct?

Adám

@JoKing Yes. It has pretty much all modern control structures.

Emigna

@Adám If the :IFs were nested (if a then if b then ...), it would be as maxb said. In your case, you had them in the else's so it's only the 8 outcomes

Jo King

Maybe something like
    switch false:
    condition1:
      break
    condition2:
      break
    ...
    default:
    innermostcode

Adám

@JoKing You can't do partial code. Just use two msgs, and chat will "merge" them.

@JoKing Ah, Dyalog APL's "switch" is called :Select and goes on a value, not on a set of conditions.

Jo King

12:22 PM

right, thanks. I always forget how chat markdown works

maxb

@Adám It was impossible to determine what the if-statements said. If it is nested like you say, it's ugly but not that hard to debug. If every one of those nested if-statements had 2-3 else if-statements, it could be a problem.

Jo King

@Adám I meant that the evaluated conditions are matching against the value false. Does that kinda work?

Adám

@JoKing Ah, I get it. I've never thought of using :Select/:Case in such an inverted manner, but that could work. Clever.

Leaky Nun

@JoKing are you kidding?

Jo King

12:42 PM

@LeakyNun I mean, if i was actually coding it I would just stick with the ifs... it's just an interesting alternative

Leaky Nun

@JoKing wrong answer

Jo King

@LeakyNun no fair, there wasn't an objective winning criterion

Leaky Nun

you're supposed to answer with "no, I'm his brother joking"

2

Adám

@LeakyNun Wrong question. You should have asked "are you KidDing?"

Leaky Nun

fair

Jo King

12:46 PM

sad trombone noise

Adám

1:10 PM

Thank you @all for the feedback. I manages refactor it down to 2 levels of :Ifs and the secondary ones are only in the final :Else clause (which does the actual work).

Geobits

1:38 PM

@NathanMerrill I read about that lol. I used to have CenturyLink here too, but their local service got bought by Consolidated, which is possibly the worst ISP I've ever dealt with. And that's saying something, since I've used Comcast, CenturyLink, and FairPoint, among others

ASCII-only

2:25 PM

@Emigna why :|

Emigna

@ASCII-only In general, to make the code easier to read and maintain

ASCII-only

@Emigna eh, it's just code style, not really doing something wrong IMO

What's really wrong is the languages are missing macros/inlined functions

Dennis

@Emigna Tell that to Lisp programmers.

Emigna

@ASCII-only Yeah, I can't say that I always follow the "rules" for clean code.

@Dennis Yeah :) That "rule" is probably not applicable to most languages. Works fine for Java/C# though

ASCII-only

@Emigna if it works for Java, it works for most languages

Dennis

2:34 PM

I don't think it does. Two levels of indentation is barely enough for Hello World.

Skidsdev

I think that "rule" when applied to languages like Java or C# usually means more than 2 levels of indentation within a method

namespace, class and method themselves not counting

which would actually make it 4 in Java, 4-5 in C#

Dennis

Eh, just golf the indentation and you're fine.

ASCII-only

Yeah. Good luck getting Java to have less than too many levels of indentation, let alone 2

@Dennis 2 spaces like in JS? :P

Dennis

Spaces are the devil's indentation.

ASCII-only

:|

But with tabs HTML gives you 8 spaces worth of indentation

maxb

2:39 PM

@Dennis That's why I don't indent anymore ever since the Enter key broke on my keyboard. The upside is that I only have one line of code to debug.

Dennis

tabs > no indentation > spaces

maxb

Can you ping someone in a chatroom that they have not joined?

Dennis

I can. You can't.

Adám

@maxb Only mods, and they have to @@superping.

ASCII-only

@maxb the downside is you can no longer use 2d languages without the pain of on screen keyboard

maxb

2:45 PM

I got an answer for my KotH challenge that was deleted quickly, but it's a really good answer, and I can't notify them of this fact.

ASCII-only

Unless of course you 1. Rebind enter or 2. Use a good editor and virtual spaces

Dennis

@ASCII-only That's defined in your browser's stylesheets, not HTML. You can set it to any amount you'd like.

maxb

@ASCII-only I have a script listening to my microphone that sends an Enter keypress once a threshold is reached. A short and simple scream once in a while helps me get through the day.

2

ASCII-only

@Dennis true. I had it set to the sane amount of 4 on my laptop

@maxb :/

Dennis

It's better than mapping overheating to Enter.

maxb

2:49 PM

@Dennis If I did that my Dell XPS would be unusable for typing anything.

ASCII-only

@Dennis the bigger problem is that they're using a shot and simple scream instead of like tapping the shell of the laptop or something

maxb

@ASCII-only But it's both short, and simple. Besides, I scream by instinct once I reach the 79th column.

J. Sallé

@maxb this is genius. I'd totally scream instead of pressing enter even though my enter key works fine.

ASCII-only

@maxb what if that makes it break an identifier in half

maxb

@J.Sallé Feel free to create your own implementation, as long as you add a credit in the source code

@ASCII-only I only use 1-byte identifiers of course.

J. Sallé

2:59 PM

@maxb Not sure how I'd make it work though, my workplace is basically filled with screaming people.

El'endia Starman

Re. the indentation discussion above, I would guess my work's main codebase (Python) has something like 90% within 4 levels and 95% within 5 levels. If you need more than class -> def -> if -> for -> if or whatever, there's a very good chance you can make it simpler, at least by breaking out functionality into helper methods.

Nathan Merrill

@Geobits You know, I'd be ok with an ISP with terrible customer service. As long as I got high speeds

Which, incidentally, feels like my current ISP. I get great speeds, but everybody I talk to feels like they don't know anything about the internet

Their website looks like it is from the 80s

Actually...I just went to their website, and I'm totally proven wrong. They updated.

ASCII-only

3:23 PM

@J.Sallé volume is inversely proportional to distance so other people shouting will be fine

Geobits

@NathanMerrill I gave up on tech support in particular a long time ago. If I have to talk to them, I end up pretending I have windows installed when they ask me to do stuff

"Go to the control panel and make sure X setting is on" -> "Ok, done"

New Main Posts

2

Q: Optimizing swiping across a 1D keyboard

This is a code-challenge with a custom scoring system, where the lowest score wins. Introduction Many smartphones allow to enter text by swiping your finger across the 2D virtual keyboard. This technology is usually combined with a prediction algorithm that outputs a list of guessed words, sort...

code-challenge optimization

quartata

4:07 PM

watching ice melt

@El'endiaStarman i feel like Linus's three indentation level rule is rather C-centric, since being encapsulated in a class automatically adds that extra indentation level

DJMcMayhem

Sounds thrilling

Geobits

Extra indentation levels are thrilling indeed

quartata

@Downgoat of course not

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