in reply to prompting a user for input

Here's a neat regex I've learned for Y/N: 
/(Y(es)?|N(o)?)/i

[download]
this accepts Y, N, Yes, No, and ignores cases.

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Re: Re: prompting a user for input
by blakem (Monsignor) on Nov 05, 2001 at 02:14 UTC
    You probably want to anchor that at the ends, otherwise 'abcNOdef' and 'blahYblah' will match. Also, the parens around the single char 'o' are unnecessary. 
    /^(Y(es)?|No?)$/i

    [download]

    -Blake

[reply]
[d/l]
      Looking at: 
      ~/^(y|yes)$/i

      [download]
      This would be my choice: 
      ~/^(?:y(?:|es))$/i;

      [download]
      matches y or yes without any regard to case and doesn't store the match in $1 unnecessarily. TMTOWTDI

      -tengo mas que aprender
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