Ruby on Rails

Robert Walker wrote in post #1049376:
> #!/usr/bin/env ruby
> require 'set'
>
> def random_numbers(n = 500)
> my_set = Set.new
> while my_set.size < 500
> value = Integer((rand * 1) * 1000) / Float(1000)
> my_set << value
> end
> my_set.to_a
> end
>
> puts random_numbers.size

One caveat with this technique: Make sure you build in some "circuit
breaker" protection code. The more numbers you ask this to generate the
more rounds it will take to produce the result. Generating 500 unique
numbers is averaging about 700 rounds. The closer to 1000 you get the
more rounds it will take. Over 1000 and it will never finish.

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