alphanumerics = [*('0'..'9')] + [*('A'..'Z')] + [*('a'..'z')]
(0...25).map { alphanumerics[Kernel.rand(alphanumerics.size)] }.join

...

Ruby Generating a string of rand...

by scudco, July 02, 2008 18:23, 4 refactorings, tagged with random, random character

So this is kind of trivial ...