Hi,
I have a sequence of items and want to group them into categories, the
value of which is a function of the item. This sounds exactly what
group-by is after.
The kicker is that the function could return multiple values. Imagine each
item was a date range and I wanted to group them by the number of days in
that date range.
For example, (group-by #(range 1 (inc %)) [1 2 3] => {(1) [1] (1 2) [2] (1
2 3) [3]}. I want {1 [1] 2 [1 2] 3 [1 2 3]}.
Any ideas?
Thanks!
Col
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