From: "Eric I." <rubytraining@...>
Date: 2008-07-17T06:39:52+09:00
Subject: Re: The next number that is not in an array

On Wed, Jul 16, 2008 at 5:01 PM, Tim Conner <crofty_james@hotmail.com> wrote:
> I want to increment the current value of a variable to the next number
> that does not appear in an array of restricted numbers.
> e.g.
> restricted_numbers = [2,3,4,5,8,10,15,29]
>
> if the variable is currently storing 11 then I want to increment it to
> 12,
> however if the variable is currently storing 1 then I want to increment
> it to 6.
>
> How is this done in ruby?

How about:

begin
  value += 1
end while restricted_numbers.member?(value)

Depending on the size of your list of restricted values, you may want
to use a Set rather than an Array, as it can test membership much more
efficiently.

Eric

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