Skip to main content
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options not deleted user 159

A code challenge is a competition for creative ways to solve a programming puzzle with an objective winning criterion not covered by other scoring tags (e.g. code-golf).

2 votes

Sort-a-number. Sorta

SED 67 Chars (score either 67 or 107) s/$/;0123456789/;:a;s/\(.\)\(.\)\(.*;.*\2.*\1\)/\2\1\3/;ta;s/;.*//; This uses a bubble sort for brevity. Score would be 107 if each regular expression pattern an …
Hasturkun's user avatar
  • 1,254
2 votes

Implement a sorting algorithm with no change.

SED s/$/\n !"#$%\&'()*+,-.\/0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~/;:a;s/\(.\)\(.*\)\(.\)\(.*\n.*\3.*\1\)/\3\1\2\4/;ta;s/\n.*// Doesn't modify anything but …
Hasturkun's user avatar
  • 1,254
2 votes

Generate a (completely deterministic) pseudorandom bit stream

C, 52 chars main(a){for(a=1;putchar(48+a%2);a=a/2^-(a%2)&576);} This is a 10 bit LFSR, test results: $ ./a.out |head -c 1000 | perl randtest.pl Test 2: 1.13333333333333 (1) 2.86666666666667 (3) 3. …
Hasturkun's user avatar
  • 1,254