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Original Request:

I'd like to sort an array of strings numerically...

Modifications:

... but that doesn't handle letters (non-number strings)
... mine was shorter, but it uses an intermediate variable
... nice, but how do you get the digits before the letters?

My final version:

%w(z A 1 10 2 b).sort_by { |s| [ s[0], s.to_i, o ] }

(ugh)