Generate a ramdon string of N length in Ruby

I prefer avoiding the creation of the full array. Like this:

length = 8
(0..length).to_a.collect { (rand() * 25 + 65).to_i.chr }.join

It generates from A..Z, from ASCII char codes.

@endel Thanks! It is also good like this:

Array.new(8) { rand(65..90).chr }.join

This works as well: rand(36**length).to_s(36)