Calculate the determinant of a n x n matrix.
Rules
read matrix from standard input
write to standard output
do not use ready solutions from library or language
input: columns separated by any space char
input: lines separated by cr and/or lf
Winner
The shortest code :)
The mission is to implement a cat-like program (copy all stdin to stdout) in less than 100 bytes of code.
Rules:
You may only use standard libraries
Indentation must be either two spaces or a single tab (in languages which require indentation)
Scripts must use shebangs
The result of cat anyth...
Catchphrases and concepts that spread from person to person are known as memes, which, courtesy the Internet, can now explode across the Earth like a highly contagious virus (hence "going viral"). As with their real-life counterparts, some infectious diseases are global (pandemic), while others a...
For some or other reason, typing @ᔕᖺᘎᕊ in a chat room pings everyone who's been in that chat room for the last 7 days...
Seems to work in all chat rooms (I only tested 2 as I don't want to upset too many people...)
How should we proceed?
Home improvement for the Minotaur
The cretan labyrinth is quite easy to draw. Just start with a symmetric shape (here in red). Let us call all the endpoints of those lines 'nodes'. Then you begin drawing the arches (black): The first one alway begins in the top middle node and connects to the n...
(This is a variation on Print a Negative of your Code, which I enjoyed a lot! Thanks to Martin Büttner♦ - almost all of this text is his.)
Let's consider the symbols to be the following printable ASCII characters (note that space is included):
!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~
And the alphanu...
What is the Sandbox?
This "Sandbox" is a place where Programming Puzzles & Code Golf (PPCG) users can get feedback on prospective challenges they wish to post to the main page. This is useful because writing a clear and fully specified challenge on the first try can be difficult. There is a much...
Define C/C++ functions that implement factorial of a natural number
Interface:
int fact( int num );
Code must not contain imperative elements, like loops (for, while, goto etc.) and variables must not be assigned more than once.
Solution with most votes after three weeks wins.
Code size doe...
CJam, 44 40 bytes
Ie3_2*,f-:e-2{ea:~f{-P*180/mcmC2#}:+}$0=
Try it online in the CJam interpreter.
Test cases
$ for i in 1\ 3 90\ -90 0\ -120\ 120 0\ 810 1\ 3\ 3 180\ 60\ -60 0\ 15\ 45\ 460 91\ -91 -89\ 89
> do cjam <(echo 'Ie3_2*,f-:e-2{ea:~f{-P*180/mcmC2#}:+}$0=') $i
> echo
> done
2.0
180...
Implement an API for probability distributions
code-golf random
Introduction
In this challenge, your task is to implement a collection of simple functions that together form a usable mini-library for simple probability distributions.
To accommodate some of the more esoteric languages people ...
I have centos 6 and all account (user websites) redirect to ww9.domain.ext
When I check the nslookup find some fake record :
ww9.mydomain.net IN A 166.78.101.108 604800s (7.00:00:00)
*. mydomain.net IN A 77.247.178.109 604800s (7.00:00:00)
*.mydomain.net IN A 77.247.178.109
ser...
