Created
January 12, 2012 22:14
-
-
Save timuruski/1603465 to your computer and use it in GitHub Desktop.
Not surprising, but slightly fun math thing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| x = 129 | |
| a = (0...x).map { |n| (n % x) }.uniq | |
| puts a.size == x # true | |
| x = 129 | |
| a = (0...(x-1)).map { |n| (n % x) }.uniq | |
| puts a.size == x # false |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment