Clojure Q&A - Recent activity in math.combinatorics

Retagged: clojure.math.combinatorics/partitions can throw error with duplicate items and :min & :max args

Wed, 01 Mar 2023 16:37:40 +0000

When called with some duplicate items in items and with a :min & :max supplied, clojure.math.combinatorics/partitions can throw an IndexOutOfBoundsException. For example:
(dorun (clojure.math.combinatorics/partitions [1 1 2 3 4 5] :min 5 :max 5)) Execution error (IndexOutOfBoundsException) at clojure.math.combinatorics/m5$fn (combinatorics.cljc:859).
I can't replicate this when items doesn't include at least one duplicate, nor can I replicate it when :min isn't at least 5. I think :max has to be supplied, but doesn't always have to be equal to :min.
It happens with non-number items, and regardless of the order of items. It seems that it occurs when the first item is duplicated, but not for the other items.

Answered: Better support for sets

Wed, 26 Jun 2019 12:00:00 +0000

Reference: https://clojure.atlassian.net/browse/MCOMB-8 (reported by glchapman)

Answered: Allow maps as multi-sets

Wed, 26 Jun 2019 12:00:00 +0000

Reference: https://clojure.atlassian.net/browse/MCOMB-10 (reported by tmulvaney)

Answered: Support ClojureScript by converting from CLJ to CLJC

Wed, 26 Jun 2019 12:00:00 +0000

Reference: https://clojure.atlassian.net/browse/MCOMB-6 (reported by alex+import)

Answered: Please add project.clj

Wed, 26 Jun 2019 12:00:00 +0000

Reference: https://clojure.atlassian.net/browse/MCOMB-3 (reported by alex+import)