What does the `:` do in http://codegolf.stackexchange.com/a/47888/41711 ?
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Digging around in the depths of your temp folder, you find some compositions for the piano. Unfortunately, these compositions were written with note names and durations only, and you only have access to a text terminal. Therefore, your task is to write a...
Consider all $n$ by $n$ matrices whose elements are real values in $[0,1]$. Now for a given $n$, consider all those matrices with maximum determinant.
Are all the elements of these matrices always either exactly $0$ or $1$?
From numerical experiments this seems to be the case but I don't s...
0
One of the secret chambers in Hog-warts is full of philosopher’s stones. The floor of the chamber is covered by h × w square tiles, where there are h rows of tiles from front (first row) to back (last row) and w columns of tiles from left to right. Each tile has 1 to 100 stones on it. Harry has t...
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Your program must find all the words in this wordlist that contain all the vowels (a e i o u y). There are easy ways to do this, but I am looking for the shortest answer. I will take any language, but I'd like to see Bash.
Here is an example (could be much improved):
cat wordlist.txt | grep "a"...
This is the first problem I've posted here; please post criticisms in comments.
Summary
A game board consists of a starting space, an ending space, and between them are N spaces, each with an instruction. You begin on the starting space with 0 points to your credit. Flip a coin or roll a die to...
CJam Expander
Input: a program written in CJam. You can accept input however you'd like.
Output: the same program ready to be put into a PPCG answer. You must:
Not change the horizontal position of any token in the program.
Put each token one line below the previous one except } which must ...
0
Recently the challenge Word with greatest repeat of letters was posted. The OP said that it was inspired by a question on Stack Overflow, in which the user sought assistance with a solution to a Coderbyte challenge (specifically Letter Count I). The challenge posed here amounts to a reproduction ...
Redraw an Image
code-golf
In this challenge, you'll be redrawing an image with colors from another image.
Input
The input will consist of two image files. The first image will be the one you need to redraw, the second will be the image which you grab the colors to redraw the first one with
...
While moving, I broke my lamp. Now, I need a new one. It's your job to make me a lamp! I'm not sure what size I want, though I know I want a squiggly one.
Your program/function must take in a number input, and print out a lamp with that many squiggles/bumps.
Examples:
Input:2
Output:
/--\
...
Retina or Trash!
We live in a wonderful age of technology where we can have beautifully detailed 8K screens on our TVs, and even 2K displays on our phones for our mobile browsing pleasure. We've come a long way in recent years in terms of screen technology.
One of the products of this is a ter...
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This is a list of unofficial, deadline-less (hence not searchable) bounties offered by users on various challenges on the main site.
Disclaimer: There is no guarantee that the user will award the bounty for you in case you fulfill its requirement. Especially if the user isn't an active member an...
Retina, 530 bytes
+`(\d+) (\d+) (\d+)\.(\d)
${1}0 ${2}0 $3$4.
\.
\b(?=\d)
#
+`(\d*)#(?:(((((((((9)|8)|7)|6)|5)|4)|3)|2)|1)|0)
$1$1$1$1$1$1$1$1$1$1$2$3$4$5$6$7$8$9$10#
\d
1
1(?=1*(?<=(1+))#)
$1
# (1+)#
$1
r`(?<= .*)1
1111111111111111111111111111111111111111111111111111111111111111111111111111111...1
Write a program that takes in a string where every line consists of the character 0 indented by some number of spaces. The top line is not indented and every other line will be indented by at most one more space than the line just before it.
No lines will have trailing spaces but you may optiona...
Consider the following bit of code:
f=(m,c)=>{m?c()&f(--m,c):0}
(thanks to zzzzBov for this little nugget)
which is a "for"-less loop
and the following:
a=b=>b++
Given these two snippets, and the fact that:
z = 0; f(10,a(z));
which I would expect would result in z equating to 10, but i...
