in reply to A mod2 Machine.

/['0' | '2' | '4' | '6' | '8']$/i
A string ending in |, ' or a space is not even. Digits do not have upper and lower case variants. 
/[02468]$/

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لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

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Re^2: A mod2 Machine.
by code-ninja (Scribe) on Jul 04, 2013 at 07:26 UTC

    I wanted to say

    /[02468ace]$/i;

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    /i is now significant.

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