Hi Colin,
One more solution, with example data in the process commented
*(let [f #(range 1 (inc %))*
* coll '(1 2 3)]*
* (->>*
* *(for [*x coll *; x = 1, 2, 3
* y *(*f x*)]* *; y = 1 (where x = 1),
* *; 1, 2 (where x = 2),
* *; 1, 2, 3 (where x = 3)
* *[*y x*])* *; [y, x] = [1, 1], [1, 2], [2, 2], [1, 3], [2,
3], [3, 3]
* *(reduce * *; for example where
* *(fn [*a *[*y x*]]* *; a = {1 [1 2 3], 2 [2]}, [y x] = [2 3]
* *; => (a y []) = [2]
* *; (conj ... x) = [2 3]
* (assoc a y (conj (a y []) x)))*
* *{})))* *; (assoc a y ...) = {1 [1 2 3], 2 [2 3]}
Hope this helps.
Y.Kohyama
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