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bouzuya/assert.clj

Created September 14, 2012 14:51
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assert.clj
(defn str-to-int
[s]
{:pre [(string? s)]
:post [(number? %)]}
(Integer/parseInt s))
(str-to-int 10) ; java.lang.AssertionError
(str-to-int "10") ; => 10
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