The Nineteenth Byte

A: Sandbox for Proposed Challenges

2:26 AM

New profile picture

Lyxal

If I had a cent for each time I changed my profile picture, I'd have around 7 cents.

Actually, it's probably 8 cents

New Sandboxed Posts

3:30 AM

B-a-NaN-a code-golfkolmogorov-complexityrestricted-source Somewhat famously, 'B' + 'a' + + 'a' + 'a' returns BaNaNa in Javascript. You goal is to output precisely BaNaNa. However, to keep it more in the style of the original Javascript, you may not use: The bytes 78 or 110 Whatever n or N are en...

null

4:05 AM

ηε{ÇOžz%ç}J (05AB1E)

Golf the reverse of this program! (Given the output, output the input)

Bubbler

4:34 AM

Any feedback for this and this?

New Main Posts

4:56 AM

Q: Surround a string with "friendliness pellets"

Input a String and surround it with a rounded rectangle of alternating "friendliness pellets".(0) Sandbox Idea originally from Lyxal. Challenge Given a single line String of length \$<100\$, print the string with a rounded rectangle of alternating pellets(0) around it. The rectangle must be 11 l...

code-golf

Lyxal

5:27 AM

Woo yeah, it's a feedback request for More Codington Crescent

Any feedback is greatly appreciated.

3 hours later…

New Sandboxed Posts

8:02 AM

A: Sandbox for Proposed Challenges

Sandbox note: This is partially inspired by There's a fault in my vault!, which I thought had some interesting ideas in it. This is my effort to frame those ideas in a clearer fashion. Cops/Robbers: Create a weak block cipher cops-and-robberscryptography In cryptography, we often use block ciphe...

1 hour later…

Neil

9:07 AM

@Bubbler aren't staircases just isosceles right triangles?

hi.

@null It's impossible. Although you can sort something, you can never work out the original string before sorting for a sorted result.

hi.

9:53 AM

Challenge idea: Train a neural network that reverses the sorting operation. The reverse-computation should be as accurate as possible (the score is the sum of the number of inaccurate items in the reverse-sort).

@null Would this be a good challenge idea?

the default.

10:11 AM

I'm not null, but, quoting you: "It's impossible. Although you can sort something, you can never work out the original string before sorting for a sorted result."

New Main Posts

10:42 AM

Q: Erase all data from disk! Wha? Wha??? WHAT?

⚠️ WARNING: ALL CODE IN THIS QUESTION AND ANSWERS BELOW IS VERY DANGEROUS BECAUSE IT CAN PERMANENTLY ERASE ALL DATA ON YOUR DISK. BE CAREFUL !!! Background Hi everybody! I'm an active contributor of Stack Overflow in Russian and some time ago a troll came to our community. He asked a question co...

code-golf

2 hours later…

null

1:11 PM

@hi. I didn't sort it at all. It's totally reversible.

@thedefault. Please call me by the proper name, HighlyRadioactive, not the vandalized name.

I will change my name back after Sep 29 (30-days limit).

1:36 PM

@null Mods can change your username, if you raise a mod flag (or ping Doorknob) and ask for it to be reset, it'll probably work

null

1:52 PM

tl;dr mod flag can do everything

@null Mods have a lot of power, and mod flags are a way to ask them to use that power :P

2:24 PM

Can anyone guess how I did it?

New Main Posts

Q: Find the largest banknote

Banknotes in many countries come in denominations of 1,2,5,10,20,50,100,200,500,1000,... etc. Given a positive integer as the input, the program should output the largest bank note that is less than or equal to the input. Examples: 3 => 2 5 => 5 9 => 5 42 => 20 729871 => 500000 3789345345234 => 2...

code-golf sequence

2:45 PM

@RedwolfPrograms clear(this)

No, but good guess

3:17 PM

Homoglyphs?

Close. It is unicode related.

or photo manipulation

RTL override?

No. U+feff

Byte order mark, invisible

Either way, cheating

Yeah. It's pretty underhanded, once I set my friend's OS autocorrect to replace "switch" with "sw [u+feff] itch", so he spent hours trying to figure out what was wrong with the syntax until he figured it out

3:40 PM

can wolfram alpha solve T (0) = T (1) = 1. T (n) = T (n − 1) + T (n − 2). ?

or really are there any programming tools that can do that?

Adám

@Anush Did you try Prolog?

@Anush Isn't that just Fibonacci?

@cairdcoinheringaahing yes offset by one

but I am wondering about available libraries

and programming languages

Forgive my ignorance, but what do you mean by "solve" it?

the answer is just some number to the power of n

3:44 PM

I don' know what the question is

What do you mean by "solving a sequence/recurrence relation"?

given a function T defined as T (0) = T (1) = 1. T (n) = T (n − 1) + T (n − 2). Find a closed form formula for T(n)

Oh right. Hasn't that already been solved?

yes

I am asking a coding question

Have you tried?

@JohnDvorak I did just copy and paste it into wolfram alpha but that didn't work

3:48 PM

I just realized why my new profile picture seems so familiar, it's almost the same as histocrat's /:
I think I'll go back to the old one so it doesn't confuse people

Razetime

4:03 PM

@NewMainPosts Sounds hilarious lol