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totallyhuman
totallyhuman
12:03 AM
lambda s:max(map(len,re.findall('a+',s))or[0])
import re
 
Adám
Adám
12:14 AM
CMC: Longest run of identical characters.
 
ais523
ais523
do we have a question that asks for a program that does nothing?
I can't find one, and I'm fairly shocked that it hasn't been posted yet (despite being clearly terrible)
also, how mad would people get if it were asked?
 
Adám
Adám
@ais523 I think we do, but there would be an awful lot of 0 byte solutions.
 
ais523
ais523
@Adám 4 bytes in Brachylog 2, although I don't have an appropriate keyboard for typing it offhand :-P
wait, no, 5
 
Adám
Adám
@ais523 Yeah yeah, the margin is too small and all that :-)
 
ais523
ais523
take blocks of consecutive characters, take length of each, sort, take last
that's five builtins
in Jelly, it's run-length-encode, tail each, maximum; that's four builtins but also five characters because the first is two bytes long
when I program I don't even think of the actual representation of the code on disk much at all
just the algorithm
but for golfing languages I also tend to memorize how long each builtin is because that lets me work out what algorithm is shortest
 
Adám
Adám
12:25 AM
@ais523 I can't find one either. Maybe better as CMC?
 
ais523
ais523
possibly could work as a CMC with the stipulation that you can't choose a language where it's the shortest possible program?
 
Adám
Adám
@ais523 Sounds good.
 
ais523
ais523
to be honest, I kind-of want to post it to the main site just to make a stupid point about HNQ, but I'm not sure I'm that vindictive
 
Adám
Adám
@ais523 Are trailing newlines allowed?
 
New Meta Posts
New Meta Posts
1
Q: What is happening to PPCG?

ElPedroHi Guys & Gals and fellow golfers. I just want to ask a question and hopefully get some meaningful answers. I am a relative newbie on PPCG with a rep of only around 2.5k. That suits me but I am continually seeing questions closed for newcommers as dupes and unclears and get very little chance ...

discussion site-health
 
ais523
ais523
12:27 AM
I guess to make it not 100% trivial: must work for arbitrary input and print no bytes of output
normally I/O formatting isn't a major part of a challenge
but when there's literally nothing to the challenge itself, all the peripheral stuff becomes important
 
xnor
xnor
@ais523 I'd kind-of like a null challenge so that we could close trivial challenges as duplicates of it because its answers can be trivially adapted to the new challenge
 
ais523
ais523
haha :-)
 
Adám
Adám
@ais523 So it must take input?
 
ais523
ais523
@Adám no, it's OK if it doesn't read it, but if it does read it it mustn't let it interfere with its operation
which I guess, to avoid ambiguity, means "must work regardless of the byte sequence on STDIN"
(fun fact: this actually makes the task impossible in some languages, such as Brachylog)
 
Adám
Adám
@ais523 AND not be the shortest possible program in that language. Sounds good.
 
ais523
ais523
12:31 AM
tell you what, I'll Sandbox it
 
Adám
Adám
@ais523 Yeah, probably a lot of golfing languages. Hey, maybe a pretty good challenge after all.
 
ais523
ais523
sandbox votes might correlate to main votes? possibly?
 
Adám
Adám
@ais523 may we throw an error? output on stderr? quit?
 
ais523
ais523
no, yes, yes as I'm currently writing it
do you agree with those choices?
 
DJMcMayhem
DJMcMayhem
@Adám Haha, I was thinking about posting exactly that to main
 
ais523
ais523
12:32 AM
(the leading "no" is purely based on preventing syntax-error-based solutions)
 
Adám
Adám
@ais523 i think no stderr output is more interesting.
 
xnor
xnor
@Adám i'm off for now, feel free to edit my changes to the cartesian product challenge
 
Adám
Adám
@ais523 i agree
@xnor ok
 
ais523
ais523
I can do no stderr
 
Adám
Adám
@ais523 yeah, it has to do truly nothing.
@ais523 also, no preventable side effects allowed.
@ais523 May base on the specs from here?
 
ais523
ais523
12:46 AM
 
totallyhuman
totallyhuman
please tell me it's titled 'do nothing'
 
ais523
ais523
it is
I originally gave it a more complex title then realised that "do nothing" was clearly the only acceptable title, and edited it down before posting it
 
totallyhuman
totallyhuman
ooh is there a challenge about punnett squares?
there's none
imma make one
 
DJMcMayhem
DJMcMayhem
1:02 AM
@ais523 I'm trying to make sure I understand the challenge. By default, the empty V program prints all input. It would require dG if I want to print nothing regardless of input. So is dG a valid program because it prints nothing? Or is it Invalid because it does something (deleting input from the buffer)
Another question. Can I use brain-flak, which always prints a Newline by default?
 
ais523
ais523
@DJMcMayhem If you're using V on TIO, it's valid; the program is self-contained, it's taking input from the input stream, producing (no) output on the output stream, there isn't a buffer that outlives the program
@DJMcMayhem no, suppressing the final newline is part of the challenge, and if that's impossible, so be it
 
Adám
Adám
@ais523 Why? unless they're an unavoidable consequence of running a program
 
ETHproductions
ETHproductions
The empty program in Japt prints undefined; the shortest program that prints nothing is P, which simply introduces the empty string as the result of the final expression. Is this a legal entry?
(It's approximately equivalent to eval("''") in JS)
 
New Sandboxed Posts
New Sandboxed Posts
0
A: Sandbox for Proposed Challenges

ais523Do nothing Write a program which terminates normally (not in an error), producing no output on the standard output stream (or the language's closest equivalent), nor on the standard error stream, regardless of what content is present on the standard input stream. (Note that this is intentionally...

 
Adám
Adám
@ETHproductions Doesn't that print a newline?
 
DJMcMayhem
DJMcMayhem
1:06 AM
@ais523 Ok, sounds good (on both points). Maybe clarify that doing nothing is defined in terms of IO, rather than actually not doing anything
 
ETHproductions
ETHproductions
@Adám No, Japt's never heard of the mythical "trailing newline"
 
ais523
ais523
@ETHproductions IMO yes
@Adám I interpreted that as "running a program on the OS", and said so on the sandbox post
do you disagree? "running a program in the language" seems unfair because it gives an advantage to languages which can't suppress implicit newlines
 
user165474
...I just realized how dumb I am lol
 
Adám
Adám
@ais523 Not really. If it cannot be suppressed, then it has nothing to do with the program, but rather the system around. The point of the challenge is to suppress everything that CAN be suppressed.
 
ais523
ais523
right, but we're arguing about what "can" means here
"can" for the language? or "can" for the OS
in most challenges, we don't ask "do as much as possible in the language you're using", because then you can pick a low-powered language and do less
why should this be different?
 
Adám
Adám
1:11 AM
Unrelated to the ongoing discussion, but an example of what constitutes a valid submission: In APL, the shortest valid program is empty, and would fulfill the specs, except that there are no shorter programs which DO do something. So {} is a valid solution because it takes any input(s) and does nothing at all. (Don't worry, I didn't give away my shortest solution.)
 
ais523
ais523
have you read the post?
I'm disallowing languages altogether if the shortest non-erroring program does nothing
 
Adám
Adám
@ais523 Really? I think you can lessen that requirement to be that there must be a shorter program which does something. This will allow more answers.
@ais523 Yes, and made a comment about that.
 
ais523
ais523
I don't think "post the second-shortest program that does nothing if the shortest program is empty" is interesting
you could just fill it with a comment
 
nmjcman101
nmjcman101
Why not just "no zero byte programs"? because too many one bytes that do nothing?
 
Adám
Adám
@ais523 good point.
 
ais523
ais523
1:15 AM
@nmjcman101 also for languages with unavoidable boilerplate
(INTERCALL, two Ls, is the most ridiculous demonstration of that, but there are plenty of others)
 
Adám
Adám
@nmjcman101 As ais523 said, a single comment symbol would circumvent the 0-byte ban.
 
New Sandboxed Posts
New Sandboxed Posts
0
A: Sandbox for Proposed Challenges

totallyhumanGolf a Punnett square solver! Very incomplete, any feedback on what to add is appreciated. Punnett squares are diagrams used in biology to predict an outcome of a particular cross of [find a word]. [add more detailed punnett square description] Your task is to write a program or a function th...

 
totallyhuman
totallyhuman
whoa
that's fast for NSP
 
ais523
ais523
I believe NSP checks once every n minutes, so it can be fast if it happened to check just after you posted
 
Adám
Adám
@Doorknob can you clean these comments?
 
New Main Posts
New Main Posts
1:39 AM
0
Q: Diagonal Alphabet

Stephen SGiven no input, your task is to generate the following: a b c d e f g h i j k l m n o p q r s t ...

code-golf kolmogorov-complexity
 
New Sandboxed Posts
New Sandboxed Posts
0
A: Sandbox for Proposed Challenges

Aidan F. PierceIs this number a repdigit? code-golf math number Challenge Create a function or complete program that takes a single integer as input and returns or outputs to STDOUT a truthy value if the input number is a repdigit in base 10 and falsy otherwise. Winning The shortest code in bytes wins. Tha...

 
Helka Homba
Helka Homba
Anyone know where to find the default cursor file (.cur) in Windows 10? I't doesn't seem to be in C:\Windows\Cursors
 
ais523
ais523
I don't know, but at a guess, it'd be tied into the system theme somehow
and may be part of a DLL
Windows resources are probably more commonly packaged into DLLs than existing "loose", because they can be loaded in either form, and the DLL version is normally more convenient
 
Helka Homba
Helka Homba
Yeah. This is the annoying stuff that should be easy with computers. I just want to make the same shape cursor with in a different color
 
Helka Homba
Helka Homba
2:06 AM
Oh well. I can copy the "(none)" scheme one easy enough since there is no transparency
 
Phoenix
Phoenix
Thanks microsoft
 
J Doe
J Doe
@LuisMendo how about this one
0~: %1

{P}gk %3

3|3.333333333333333* %10

`@QQQQQQQQQQQQQQQQQQQQQQ@@< %23 with ]D to display
 
Phoenix
Phoenix
2:37 AM
How do I generate a random integer in a range in C++?
 
Leaky Nun
Leaky Nun
@Mego sorted(iterable[, key][, reverse])
 
Phoenix
Phoenix
Thanks
 
MD XF
MD XF
@Phoenix rand() % MAX_NUMBER+1
make sure you srand(time(NULL)) first
 
Phoenix
Phoenix
I like ^ more
 
MD XF
MD XF
Wait, that's C. It should work in C++
@Phoenix Mine or Leaky Nun's?
 
Phoenix
Phoenix
2:43 AM
std::mt19937 rng(rd()); makes no sense
I can at least see what yours is doing.
 
MD XF
MD XF
And that's reason 512 why I hate C++
 
Leaky Nun
Leaky Nun
@DJMcMayhem Jelly, 8 bytes: Œgf€”aṀL
 
Phoenix
Phoenix
std::random_device rd; how does this even work?
It's just declaring a variable
There's nothing being assigned to it
 
MD XF
MD XF
I don't really understand why C chose to use namespace::something-or-other anyway. It completely goes against all other syntax.
I mean, : is used for: a) bit integers, okay b) switch loops, makes sense c) inline if-else statements, I see how that can works d) but when there are two of them together they magically make a namespace function
Oh-kay, C++. Thanks for that.
 
Downgoat
Downgoat
Quetion: if I am going to do this with a fancy GPU, should I just go for an i7?
 
Doorknob
Doorknob
2:50 AM
@LeakyNun cplusplus is the w3schools of c++; usually the information on cppreference is both more accurate and easier to navigate through
 
Leaky Nun
Leaky Nun
@Doorknob I know nothing about C++
 
Doorknob
Doorknob
@Phoenix Yeah, too bad it's biased towards lower numbers if RAND_MAX isn't a multiple of MAX_NUMBER+1
 
Leaky Nun
Leaky Nun
but thanks anyway
 
Doorknob
Doorknob
@Phoenix It calls the default constructor in C++.
 
Phoenix
Phoenix
Ah
 
MD XF
MD XF
2:52 AM
#undef RAND_MAX
#define RAND_MAX MAX_NUMBER*rand()
 
Phoenix
Phoenix
@Doorknob I use msdn.microsoft.com
@MDXF Can't you redefine it without undefining it first?
 
MD XF
MD XF
@Phoenix IIRC nope
 
Phoenix
Phoenix
Huh
 
MD XF
MD XF
I mean, I know it's that way in C
I've never really used C++. I've golfed people's C++ submissions, and probably written a C++ quine or eight, but other than that, no use
 
New Main Posts
New Main Posts
0
Q: Is this number a repdigit?

Aidan F. PierceChallenge Create a function or complete program that takes a single integer as input and outputs a truthy value if the input number is a repdigit in base 10 and falsy otherwise. If taking input from STDIN, the input MUST be converted to an integer data type, if meaningful, before operating on i...

code-golf math number
 
MD XF
MD XF
3:02 AM
Out of curiosity isn't Wikipedia generally considered a reliable source by programmers?
Especially in PPCG, I've noticed that we always link to Wikipedia for references
 
New Sandboxed Posts
New Sandboxed Posts
0
A: Sandbox for Proposed Challenges

MD XFLongest run of characters in a string code-golf string Your challenge: Write a function that takes a string s, a character a, and finds the length of the longest run of a in s. The length of the run will be l. Rules: If s is of length 0, l should be 0. You may either print l or return it. No ...

 
Dennis
Dennis
@MDXF Reliable? Nope, absolutely not.
 
MD XF
MD XF
@Dennis Well not reliable per se but accurate enough that we can generally trust its definitions of various programming topics
 
Dennis
Dennis
→ 12 messages moved to Jelly
 
DJMcMayhem
DJMcMayhem
3:18 AM
 
Phoenix
Phoenix
@DJMcMayhem It's also strictly speaking not invalid because it's a constant-output challenge.
 
MD XF
MD XF
@DJMcMayhem That's terrible on so many levels
@NewSandboxedPosts feedback pls
 
Leaky Nun
Leaky Nun
3:46 AM
> TIO is now what was previously called Try It Online v2; TIO will use a rolling release model from now on. At this point, TIO isn't very different from TIO Nexus.
TIO nexus retired?
 
Phoenix
Phoenix
@LeakyNun Yes, last week.
 
Leaky Nun
Leaky Nun
I see
 
user165474
4:10 AM
I tried looking for a Python chat room but apparently there isn't one yet...
 
user165474
 
user165474
Hope it doesn't become obsolete or frozen ¯\_(ツ)_/¯
 
MD XF
MD XF
4:25 AM
How do you change what a room's parent site is?
 
Phoenix
Phoenix
You don't
 
MD XF
MD XF
Then how do I freeze a room that I'm an RO of?
 
Jan Dvorak
Jan Dvorak
You don't
 
MD XF
MD XF
:(
 
Phoenix
Phoenix
So, the charging port on my laptop is screwed. Still manages to charge though. Pic to come.
The cable keeps falling out
 
Anonymous
4:34 AM
Electrical tape
 
Dennis
Dennis
@Phoenix And that's why downvotes were invented.
 
Anonymous
@MDXF You can put a room in timeout as a RO, but only mods can freeze
 
MD XF
MD XF
@Mego Ah okay
 
Phoenix
Phoenix
@Mego Are you suggesting taping my cord to my laptop?
 
MD XF
MD XF
I just re-created the room

 The C Programming Language

General discussion about the C programming language, usage, sy...
 
Anonymous
4:35 AM
@LeakyNun Please discuss commits and PRs in the comments on the commit/PR.
 
Anonymous
@Phoenix Yes
 
Dennis
Dennis
@MDXF You ask a friendly neighborhood mod.
 
MD XF
MD XF
If you wouldn't mind...
 
Phoenix
Phoenix
I'd say that's a bad idea, but the battery was screwed long before the port. I dropped 5% in the time it took to take the photo.
 
Dennis
Dennis
@MDXF Eek, that's chat SO, not chat SE.
 
MD XF
MD XF
4:37 AM
@Dennis That was the problem
I tried to make it a PPCG chat but it somehow became SO
 
Phoenix
Phoenix
Actually, I have another ThinkPad I'm not using.
 
user165474
I think it's because your parent user is SO.
 
Phoenix
Phoenix
I could transplant the hard drive.
 
MD XF
MD XF
@HyperNeutrino Not anymore...
 
user165474
Oh hm.
 
MD XF
MD XF
4:37 AM
Wait, is parent user the one you joined first?
 
user165474
No.
 
user165474
My parent is PPCG, but I joined SO first.
 
MD XF
MD XF
Yeah then me too
 
Dennis
Dennis
Unfortunately, those are entirely different beasts. Chat SO has is own message and user ids, so just moving the room isn't an option.
 
MD XF
MD XF
I passed SO last week
 
Anonymous
4:38 AM
I don't remember how parent user is set, but you can change it in your chat profile
 
user165474
Wait Chat SO != Chat SE?
 
Phoenix
Phoenix
Nope
 
Dennis
Dennis
@MDXF Your chat parent user is still SO.
 
Anonymous
@HyperNeutrino Yep. Different set of mods and 10k users.
 
user165474
I think SO is there just to mess with all of us...
 
Phoenix
Phoenix
4:38 AM
I think Meta.SE has its own chat also.
 
MD XF
MD XF
@HyperNeutrino Accurate
 
user165474
Then again PPCG is a branch off of SO. But we're still better :D (no offense to SO users or SO :))
 
Anonymous
@Phoenix Nope, Mother Meta's chat is the same as chat.SE.
 
user165474
It has different ping notification sounds though.
 
Dennis
Dennis
@Mego Sort of. I still have mod powers on chat SO, but I don't get notifications for flags etc.
 
user165474
4:39 AM
IIRC
 
user165474
Wait mods > ROs right? (I would presume so)
 
MD XF
MD XF
@HyperNeutrino In every way, shape and form
 
Dennis
Dennis
Not in all cases, but generally.
 
Anonymous
There are two different chat servers: chat.SE and chat.SO. chat.SE is the server that every site except SO uses. chat.SO is the server that only SO uses, and it has chat permissions based solely on your SO rep, not your network rep.
 
Phoenix
Phoenix
General SE rule of thumb: Mods are gods
6
 
Anonymous
4:41 AM
To make matters more confusion, the foreign language SO sites have chat on chat.SE, not chat.SO, which means us 10k users get to try to handle flags in languages that we usually don't speak.
 
user165474
So Riker > Mego in terms of power? Or am I completely screwing up everything
 
Phoenix
Phoenix
@HyperNeutrino That is basically correct
 
user165474
Hm. Interesting.
 
Dennis
Dennis
For example, a hidden PPCG room will be visible and writable to its ROs, but non-PPCG chat mods won't be able to see it.
 
user165474
Ah okay.
 
MD XF
MD XF
4:41 AM
@Dennis Oh hm how do you hide it
I could just hide the unused C chat
 
Dennis
Dennis
You don't. That's a mod privilege.
I already deleted your C room on SO though.
 
Phoenix
Phoenix
@Dennis Huh. Here I thought the room's parent site affected only categorization when searching rooms.
 
MD XF
MD XF
@Dennis Ohh okay
Thank you
 
Anonymous
@HyperNeutrino Basically. I can't kick Riker (or any other mod).
 
user165474
Question: Why can't I move PPCG chat messages to Sandbox?
 
user165474
4:43 AM
@Mego :o interesting, but then again you should hopefully never need to
 
Phoenix
Phoenix
@Mego Can Riker kick you?
 
MD XF
MD XF
Answer: Why do you want to? Isn't trash good enough?
 
Anonymous
@HyperNeutrino You have to be a RO to move them. I can move them if you need.
 
user165474
I am an RO of said room though.
 
Anonymous
@Phoenix I believe so. I'm not 100% sure that non-RO mods can kick - they might only be able to suspend.
 
user165474
4:43 AM
Wait kick > suspend?
 
Phoenix
Phoenix
It's weird
 
Dennis
Dennis
@Phoenix And for Public and Gallery rooms, that's pretty much true. Private rooms are a different matter though.
 
Anonymous
@HyperNeutrino Nope. Kicks prevent users from chatting or accessing the room from which they were kicked. Suspensions prevent users from chatting network-wide (though they can still be in the room).
 
Dennis
Dennis
@Mego Join the sandbox and find out. ;)
 
Anonymous
@Dennis I'll take that as a yes :P
 
Dennis
Dennis
4:45 AM
I honestly don't know.
 
Anonymous
Well let's do science!
 
user165474
@Mego Then why do you say "they can't kick, they can only suspend"? It sounds like suspensions are less significant than kicks.
 
Dennis
Dennis
@Mego That worked just fine. Unsurprisingly, as I just could make myself a RO.
 
user165474
lol that works too
 
Doorknob
Doorknob
What's the golfiest way to get x && y using only bitwise operators? (Zero if both are zero, nonzero otherwise.) Does (x&y)|(x^y) work?
 
Anonymous
4:46 AM
@HyperNeutrino Suspensions are much more significant than kicks. A suspension prevents you from chatting in any room. Kicks just prevent you from chatting in a single room.
 
user165474
Ah okay.
 
Anonymous
Also suspensions can be for any number of minutes from 1 through 9999. Kicks are 1, 5, and 30 minutes (escalating automatically based on the number of recent kicks).
 
Leaky Nun
Leaky Nun
@Mego have you actually tested those before saying that they are not equivalent?
 
Dennis
Dennis
@HyperNeutrino Not that simple. Multiple kicks in a short timespan have permanent consequences that suspension don't.
 
user165474
@Doorknob (x&1)&(y&1) also works if I understand your question correctly.
 
Anonymous
4:47 AM
Also 3 kicks in a short timespan automatically raises a moderator flag, and usually results in a moderator applying a suspension.
 
user165474
Oh hm. Interesting.
 
Dennis
Dennis
@HyperNeutrino That won't work if x = y = 2.
 
Doorknob
Doorknob
@Dennis If you're referring to the permanent consequences I think you are, don't suspensions do that also?
 
user165474
(2&1)&(2&1) = (0)&(0) = 0?
 
Dennis
Dennis
Afaik no.
@HyperNeutrino Yet 2 in non-zero.
 
Downgoat
Downgoat
4:49 AM
@Doorknob why does x|y not work?
 
user165474
Oh wait I'm dumb
 
Dennis
Dennis
@Downgoat 2 | 0 = 2
 
Doorknob
Doorknob
@Dennis Are you talking about something other than this?
 
Downgoat
Downgoat
@Dennis 2 | 0 = 2?
 
Dennis
Dennis
@Downgoat Yes, sorry. So the result is 2, but y = 0.
 
Leaky Nun
Leaky Nun
4:50 AM
@Doorknob you can't.
 
Dennis
Dennis
@Doorknob Yes, multiple kicks take away the ability to create rooms.
 
user165474
Oh I figured out why my message moving attempt was failing.
 
Doorknob
Doorknob
@Dennis Oh, I wasn't aware of that.
 
user165474
I was trying to move a "moved n messages to trash" message for science
 
Anonymous
@HyperNeutrino I've done that more times than I'd like to admit
 
user165474
4:52 AM
oh rip :P
 
user165474
Also Sandbox now looks like I'm a TNB RO from a quick glance :D
 
Anonymous
@Doorknob Why not just x&y? Am I missing something obvious?
 
user165474
Because 2 & 2 == 2 but 2 && 2 == 1.
 
user165474
I think
 
Doorknob
Doorknob
@Mego x and y could both have bits set, but no bits in common. Like 0xf0 and 0x0f.
 
Anonymous
4:53 AM
Ahh
 
user165474
0/10 talking about bits and then proceeding to use hex
 
Anonymous
Are the values fixed-width?
 
Doorknob
Doorknob
Yes.
 
Anonymous
Is popcount (or the equivalent in whatever lang) allowed? If so: popcount(a)&popcount(b)
 
Anonymous
Regardless, I think (x&y)|(x^y) (your original solution) is the shortest
 
Phoenix
Phoenix
4:57 AM
What's popcount?
 
Anonymous
@Phoenix nothing what's popcount with you Returns the number of set bits
 
Anonymous
aka the Hamming weight
 
Doorknob
Doorknob
@Mego Wouldn't that still fail for e.g. 0xf and 0x1?
 
Phoenix
Phoenix
So, log_2(x)?
 
Anonymous
@Phoenix No, popcount(0b11) == 2
 
user165474
4:58 AM
@Phoenix Not quite. It's the number of 1s, so popcount(5)==popcount(3).
 
Phoenix
Phoenix
oic
 
Anonymous
@Doorknob No, because popcount(0xf) == popcount(0x1) == 1
 
user165474
@Mego false
 
Doorknob
Doorknob
popcount(0xf) = 4 = 0b100
 
Dennis
Dennis
^
 
Anonymous
4:59 AM
No... popcount is the number of 1s in the binary representation.
 
user165474
0xf == 0b1111
 
Doorknob
Doorknob
And there are 4 ones in the binary representation of 0xf = 0b1111.
 
Anonymous
Durr. Too much scotch.
4
 
Anonymous
So yeah, (x&y)|(x^y) is the best solution (and only solution so far)
 
user165474
I think the brackets around x&y are unnecessary since & has higher precedence over | normally.
 
Phoenix
Phoenix
5:01 AM
The question, then, is "why?"
 
user165474
@Phoenix why not?
 
Anonymous
@Phoenix Low-level circuits?
 
Phoenix
Phoenix
That actually makes more sense than I was expecting.
 
Anonymous
When all you have is a pile of NAND gates...
 
Doorknob
Doorknob
Well, anyway, the reason I ask (aside from curiosity) was to see if I can get away with not including && and || in my esolang without making it significantly more painful, to which the answer is a resounding yes.
 
Anonymous
5:02 AM
@Doorknob You can just use * and + instead if the lang has them
 
Doorknob
Doorknob
+ would fail if x = -y, but * would work also, yeah.
 
Anonymous
@Doorknob I was assuming unsigned
 
Anonymous
Usually the only advantage of && and || (and their analogs) is the short-circuiting behavior in most langs
 
Dennis
Dennis
Well, OR is really easy with bitwise operators: |
 
Doorknob
Doorknob
Well, I guess both + and * could overflow to 0...
@Dennis Yeah, no issues there.
 
Dennis
Dennis
5:05 AM
Btw, (x&y)|(x^y) is OR, not AND.
 
Anonymous
CMC that I may make into a proper challenge: given N, output the number of distinct pairs a, b of N-bit integers such that a * b overflows an N-bit integer
 
Anonymous
@Dennis oops
 
Doorknob
Doorknob
@Dennis Oh, wait, I'm an idiot.
10
 
Phoenix
Phoenix
CMC: Write a Wolfram|Alpha query that programatically determines which country has the highest density of goats, that is, goat population/area.
 
user165474
Of the 16 logic gates, how many of them enable you to construct all 15 others using only that one gate?
 
Phoenix
Phoenix
5:08 AM
16?
 
Doorknob
Doorknob
@HyperNeutrino NAND and NOR, I think.
 
Phoenix
Phoenix
OR, AND, NOT, XOR, XNOR, NOR, NAND, I can't think of any others.
 
Jan Dvorak
Jan Dvorak
Also both versions of ANDNOTs
 
user165474
Can you make anything with NOT?
 
Phoenix
Phoenix
No
 
user165474
5:09 AM
Then what's your list?
 
Phoenix
Phoenix
Seeing as how there's no way to convert two inputs to one output with just NOTs
 
Doorknob
Doorknob
@Phoenix Well, there's four possible inputs to a binary logical operator (TT TF FT FF), and each gate specifies either T or F for each pair, so that's 2⁴ = 16 total.
 
Anonymous
@HyperNeutrino Functional completeness is that property. Only NAND and NOR are sufficient by themselves.
 
user165474
Ooh interesting. Thanks!
 
Phoenix
Phoenix
@Doorknob It bothers me that TF and FT aren't the same.
Even though I know it makes sense.
 
user165474
5:10 AM
T->F is false but F->T is true
 
Phoenix
Phoenix
 
Anonymous
@Mego Actually, 13 bytes: ╙;r;∙♂S╔♂π♀<Σ
 
Jan Dvorak
Jan Dvorak
and with that onebox, I leave
 
user165474
IIRC, the 16 gates are contradiction, nor, not(l)and(r), not(l), not(r)and(l), not(r), xor, nand, and, iff, (r), not(l)or(r), (l), not(r)or(l), tautology
 
user165474
also contradiction implies everything and everything implies tautology
 
Anonymous
5:15 AM
 
user165474
Oh yeah i remember that
 
user165474
And then there's my answer which is just a complete mess but kinda makes sense? almost
 
Phoenix
Phoenix
Userscript-request: Set regular font in SE Chat + Main to the Ubuntu one.
 
Downgoat
Downgoat
@Riker D: why did you change name from Downcat
 
Phoenix
Phoenix
When was it ever Downcat
 
Downgoat
Downgoat
5:25 AM
@Phoenix sure, right after I set my system font to comic sans
 
Phoenix
Phoenix
ಠ_ಠ
Ubuntu font is good
 
Downgoat
Downgoat
yes and so are sheep
 
Phoenix
Phoenix
Have you seen it
It's excellent
 
Dennis
Dennis
It's pretty nice. I don't really miss anything else, but I took the Ubuntu font with me when I changed distros.
 
Phoenix
Phoenix
So did I. (Back when my Fedora install was functional)
 
Dennis
Dennis
5:29 AM
@Phoenix You can alter fonts wherever you want with the right extension. For Chrome, there's Stylish. I'm using it mainly to style the ugly Telegram web app. 
* {
	font-family: Ubuntu !important;
}

code {
	font-family: DejaVu Sans Mono !important;
}
Chat is weird.
 
Phoenix
Phoenix
Cool, thanks!
 
Anonymous
It would be pretty easy to convert that into a Tampermonkey/Greasemonkey userscript
 
Downgoat
Downgoat
@Phoenix yes it's #2 reason I don't use ubuntu
 
Dennis
Dennis
A shitty reason indeed. (sorry)
 
Anonymous
@Dennis I'm tempted to start a pun train but I'm afraid the jokes will rapidly deteriorate past an acceptable level
 
Downgoat
Downgoat
5:34 AM
@Dennis opls you have goat to be kidding me
@Mego ;)
 
Dennis
Dennis
@Downgoat No, seriously. There are so many good reasons not to use Ubuntu, and you chose something that can be tweaked to your taste with a few mouse clicks.
 
Phoenix
Phoenix
Restarts computer because DE fails for no reason at all -> Opens chrome -> Offers to restore browsing session -> opens new tab page
And I apparantly have 1.1 GB of disk space left.
 
Anonymous
@Dennis Best reason not to use Ubuntu (or Debian) is the slow updating of the default repos
 
Dennis
Dennis
@Phoenix Which DE are you using?
 
Downgoat
Downgoat
@Dennis okay well the font is meh, but the kerning, leading, etc. is really badly done
Though to be fair design is not something that open source projects are exactly known for >_<
 
Phoenix
Phoenix
5:38 AM
@Dennis Unity. Everything went black, the only thing that worked was ctrl+alt+del and start key, no windows visible
 
Dennis
Dennis
@Phoenix There's your reason.
 
Anonymous
"Unity crashed my computer!" "Working as intended."
 
Dennis
Dennis
compiz is just an unstable piece of garbage.
 
Phoenix
Phoenix
My reason is the same as the one Mego gave, but I'm still on it because I got my steam wine working just how it want it and I don't want to go through the mess of configuring it again.
As in the windows version of steam working with wine
 
Anonymous
Couldn't you just save the config files and drop them in on a new installation?
 
Dennis
Dennis
5:40 AM
@Mego I canned Ubuntu after hardware-accelerated video stopped working for three consecutive dist upgrades.
 
Anonymous
I mean, that's half the reason config files exist
 
Anonymous
@Dennis I canned Ubuntu after it stopped running on my 7-year-old server. Fedora runs great.
 
Phoenix
Phoenix
@Mego There's a bunch of them, and they also link to various fonts and icons that didn't come with Ubuntu.
 
Anonymous
@Phoenix Fonts and icons should also be transferrable
 
Dennis
Dennis
Getting fluid 1080p with mplayer required release-specific black magic. With openSUSE, it simply works out of the box.
 
Phoenix
Phoenix
5:42 AM
Sure, but it's a PITA
 
Dennis
Dennis
And Intel's video drivers are open-source, so there really is no excuse for this.
 
Anonymous
@Phoenix So is using Ubuntu as a dev environment. You can put up with a PITA now, or deal with a larger cumulative PITA later.
 
Phoenix
Phoenix
Doesn't matter anymore, everything broke recently and the one game now fails to start entirely.
I'll probably do it some time soon.
You know, if someone was installing Linux for the first time, I'd probably tell them to install Kubuntu.
 
New Main Posts
New Main Posts
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Q: Counting N-bit integer multiplication overflows

MegoGiven a positive integer N, output the number of pairs of integers 0 <= a <= b < 2**N such that a*b >= 2**N. Rules You may assume that N is less than or equal to the maximum bit width for integers in your language (e.g. for C, N will not exceed 32 or 64, depending on the architecture of the ma...

code-golf sequence arithmetic integer
 
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