My bad - fixed in 1.6! On Friday, February 15, 2013 9:15:31 PM UTC, Denis Washington wrote: > > Hi, > > I just solved the "Replicate a Sequence" problem on 4clojure [1] using > "interleave". However, I noticed that "interleave" cannot be called with > a single argument. My first attempt at solving the problem was like > this: > > (defn replicate-n-times [xs n] > (apply interleave (replicate n xs))) > > This works fine for n > 1: > > clojure=> (replicate-n-times [1 2 3] 3) > (1 1 1 2 2 2 3 3 3) > > However, for n = 1 the function fails with an exception: > > clojure=> (replicate-n-times [1 2 3] 1) > ArityException Wrong number of args (1) passed to: core$interleave > clojure.lang.AFn.throwArity (AFn.java:437) > > I had to add a special case to make this work: > > (fn replicate-n-times [xs n] > (if (= n 1) xs (apply interleave (replicate n xs)))) > > I think it would be nice if "interleave" called with a single argument > would just return the argument itself, just like single-argument "+" and > "*" do. > > Regards, > Denis Washington > > [1] http://www.4clojure.com/problem/33 > >
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