From: Colin Bartlett <colinb2r@...>
Date: 2008-05-08T17:21:17+09:00
Subject: Re: Check if char in string?

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I have a question:

If you are only testing if a single character is in a string 'aeiouy'
what are the advantages of using a regular expression instead of include?
(or index).

If I understand correctly what the original poster is trying to do
(caveat: I'm not at all sure that I do), it is something like:

str = 'you muppet'
0.upto( str.size - 1 ) do | n |
  if 'aeiouy'.include?( str[ n, 1 ] ) then
    puts 'vowel'
  else
    puts 'consonant'
  end
end

Regular expressions will work for more complicated tests
(which is why I ought to learn them!),
but do they have an advantage for something like this,
other than getting used to them?

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