How do I generate a list of n unique random numbers in Ruby?

Question

This is what I have so far:

myArray.map!{ rand(max) }

Obviously, however, sometimes the numbers in the list are not unique. How can I mak

Answer 1

How about a play on this? Unique random numbers without needing to use Set or Hash.

x = 0
(1..100).map{|iter| x += rand(100)}.shuffle