Hi,
I have a code similar to this:
(def pairs (list [1 :a] [2 :b] [3 :c]))
...
(loop [ps pairs, ret {}]
(cond (empty? ps) ret
(some-test (first (first ps))) (recur (rest ps) (add-to-
result ret (first (first ps))))
:true (recur (rest ps) (do-smth-else ret (first (first
ps))))))
You can see that string (first (first ps)), which actually gets first
element of a first vector in pairs, occur many times. I can't move it
before cond, since ps may be empty and evaluating of (first (first
ps)) will produce an error (ok, it won't, but in general case it may).
Is there another way to simplify code to not repeat one form several
times?
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