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(load "../common")
(mtest
(uni #H(() ("a") ("b")) #H(() ("b") ("c"))) (("a") ("b") ("c"))
(diff #H(() ("a") ("b")) #H(() ("b") ("c"))) (("a"))
(isec #H(() ("a") ("b")) #H(() ("b") ("c"))) (("b")))
(mtest
[group-by identity '(1 1 2 2 3 3 3)] #H(() (1 (1 1)) (2 (2 2)) (3 (3 3 3)))
(group-by (op mod @1 3) (range 0 10)) #H(() (0 (0 3 6 9))
(1 (1 4 7 10))
(2 (2 5 8)))
[group-map (op mod @1 3) sum (range 0 10)] #H(() (0 18) (1 22) (2 15)))
(mtest
[group-reduce (hash) identity (do inc @1)
"fourscoreandsevenyearsago" 0] #H(() (#\a 3) (#\c 1) (#\d 1)
(#\e 4) (#\f 1) (#\g 1)
(#\n 2) (#\o 3) (#\r 3)
(#\s 3) (#\u 1) (#\v 1)
(#\y 1))
[group-reduce (hash) evenp + (range 1 10) 0] #H(() (t 30) (nil 25)))
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