Hello David,

what's the question ?

2011/1/5 David <dsieg...@yahoo.com>

> Consider the two definitions:
>
> (defn if-let-good [str]
>  (if-let [rest (seq (drop-while (partial = \a) str))]
>    (first rest)
>    "empty"))
>
> (defn if-let-bad [seq]
>  (if-let [rest (seq (drop-while (partial = \a) seq))]
>    (first rest)
>    "empty"))
>
> The only difference between them is the name of the arg: "str" in the
> good
> definition, "seq" in the bad definition.
>
> (if-let-good "")
> =>  "empty"
>
> (if-let-bad "")
>
> aborts with:
>
> java.lang.String cannot be cast to clojure.lang.IFn
>  [Thrown class java.lang.ClassCastException]
>
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