One Liner At a Time

Just some one-liners. 'Cause, you know, to post something, and to each one its own.

even_map = dict(('key_%s' % i, i) for i in range(1, 9) if i % 2 == 0)

even_map = Hash[(1..9).find_all { |i| (i).even? }.collect {
    |i| ["key_#{i}", i] }]

(def even-map (into {} (for [i (range 1 9) :when (= (mod i 2) 0)]
                         [(keyword (str "key_" i)) i])))