I *frequently* see:
(nth (iterate foo bar) n)
And:
(->> (iterate foo bar)
(drop n)
first)
I've also coded this in `avi` after being surprised no such thing exists:
(defn n-times
[thing n a-fn]
(reduce
(fn [thing n]
(a-fn thing))
thing
(range n)))
(which is kind of a bad implementation, now that I think of it):
Would it be useful to file a ticket for a new arity for iterate?:
(defn iterate
...
([f x n]
(if (zero? n)
x
(recur f (f x) (dec n))))
There's a little bit of weirdness - this returns a single value, while the
other arity returns a lazy sequence. However, I think it's the correct
name (and the original arity might have better been named "iterations" for
symmetry with "reduce" and "reductions"). But ah well.
Thoughts?
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