Vim, 37 keystrokes
All the other answers are boring, and using boring single-byte builtins. Here's a hacky answer that does the entire thing manually, in something that isn't even a programming language:
Gmaqqgg:s/./\0<cr>d<C-v>`aGo<esc>pvGgJ@qq@q`adgg
Explanation:
G ...
Snowman, 50 bytes, score = 0.9 (45 / 50)
((}#NDe`nOnO|`2nMNdE0nR2aGaZ::nM;aF;aM:nS;aF,nM*))
This is a subroutine that takes a number as its argument and returns another number.
Computes A122649 (offset = 1).
Try it online!
M, 9 bytes, score 0.6667 (6 / 9)
r©0+’Ac®Ḅ
A tad cheaty since M and Jelly are quite similar, but allowed by the rules. @miles' crack to my Jelly answer doesn't work in M; it lacks the œċ atom.
This calculates sequence A119259. Try it online!
Would a chainsaw be a practical weapon in the medieval ages where swords and bows were the their main armaments? How well would it do against swords and shields?
Disregarding the problem with fuel of course. Just go with one of those chainsaws that always show up with a suspicious hockey masked...
The goal of this challenge is to reduce a list of string to a shorter more general list of string.
Input
A list of string that can be on of the following :
aaa
aaaX
aaaX/Y
With aaa any set of non capital alphabetic letter, and X or Y any digit between 0 and 9.
Ouput
A list of generalized ...
We see a lot of challenges here asking for a function to create a sequence from the OEIS. While these challenges are fun, as a programmer I see an opportunity for automation.
Your challenge is to make a program that takes the index of a sequence (e.g. A172141) and some integer n (e.g. 7), and p...
Totally Invertible Submatrices
(inspired by this question over on Math)
code-golf matrix linear-algebra
Given an n x n square matrix A, we can call it invertible if there exists some n x n square matrix B such that AB = BA = In, with In being the identity matrix of size n x n (the matrix with ...
Chess converter
There's quite a lot of work that's been done in the world of chess. For example, there is a standardized file format, .pgn, that describes a chess game, including the list of moves. Additionally, there's another file format .fen, that describes a board position. The challenge ...
What general tips do you have for golfing in Python? I'm looking for ideas which can be applied to code-golf problems and which are also at least somewhat specific to Python (e.g. "remove comments" is not an answer).
Please post one tip per answer.
