On Wed, Oct 21, 2009 at 10:51 AM, Lauri Pesonen <[email protected]>wrote:
> One way to fix this would be to produce a string out of c:
>
> (defn hexchar? [c] (re-find #"[0-9A-Fa-f]" (str c)))
>
> but you should really change hexchar? into something more elegant.
Like this?
(def hexchar? #{\0 \1 \2 \3 \4 \5 \6 \7 \8 \9 \A \a \B \b \C \c \D \d \E \e
\F \f})
(defn hex? [s] (every? hexchar? s))
user=> (hex? "490fdc1b")
true
user=> (hex? "490qdc1b")
nil
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