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hex probability

Name: Anonymous 2011-04-13 8:43

A numeric string containing '1'..'F' is given. What's the probability that it's a hexadecimal number?

Name: Anonymous 2011-04-13 9:10

100% if (string-every (λ (x) (or (char>=? x #\1) (char<=? (char-downcase x) #\f))) str)

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