Op woensdag 23 april 2014 13:23:17 UTC+2 schreef David Della Costa:
>
> What James meant was that you should use it like so:
>
> => (defn teen? [age] (< 12 age 20))
> #'user/teen?
> => (teen? 50)
> false
> => (teen? 10)
> false
> => (teen? 14)
> true
> => (if (teen? 14) "yes is a teen" "no, not a teen")
> "yes is a teen"
>
> You don't need to set up these wrappers returning true and false. nil
> and false are false in Clojure, everything else is true. Remember that
> and you'll be good to go.
>
> DD
Thanks,
The only thing which is failing now is this one ;
(defn abs [x]
(< x 0)
(* x -1);
x)
I keep getting -2 as answer where it must be 2
Roelof
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