I have two different functions for the same functionality. I would like to
share the pre-conditions between them.
The general function is:
(defn test-lucky-numbers-general
"Performance test of lucky numbers general"
[fn desc nr]
{:pre [(>= nr 1)
(<= nr 7)]}
(println desc)
(dotimes [i 25]
(let [lucky (time (fn 10))]))
(println)
(dotimes [i nr]
(time
(let [upto (int (Math/pow 10 (inc i)))]
(printf "With upto %d there are %d lucky numbers\n" upto (count
(fn upto)))))
(println)))
The functions themselves are:
(defn test-lucky-numbers
"Performance test of lucky numbers"
([]
(test-lucky-numbers 6))
([nr]
(test-lucky-numbers-general lucky-numbers "Testing performance
lucky-numbers" nr)))
and:
(defn test-lucky-numbers-3
"Performance test of lucky numbers (3)"
([]
(test-lucky-numbers-3 6))
([nr]
(test-lucky-numbers-general lucky-numbers-3 "Testing performance
lucky-numbers-3" nr)))
And to call all test functions I have:
(defn test-lucky-numbers-all
"Test all lucky number performance"
([]
(test-lucky-numbers-all 6))
([nr]
(test-lucky-numbers nr)
(test-lucky-numbers-3 nr)))
When I call a function with the wrong parameter, I get an error from
test-lucky-numbers-general, but I need it from the calling function. I
could copy the pre-condition to all functions, but that is not really DRY.
Is there a way I can share the pre-conditions with all (at this moment)
four functions?
The first dotimes in test-lucky-numbers-general is to warm-up the JVM. Is
there a way to know if this is already done for the function that is given?
Then it could be done only when necessary.
--
Cecil Westerhof
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