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diff --git a/test/lhs-test.markdown b/test/lhs-test.markdown new file mode 100644 index 000000000..20949b75c --- /dev/null +++ b/test/lhs-test.markdown @@ -0,0 +1,21 @@ +lhs test +======== + +`unsplit` is an arrow that takes a pair of values and combines them to +return a single value: + +``` {.sourceCode .literate .haskell} +unsplit :: (Arrow a) => (b -> c -> d) -> a (b, c) d +unsplit = arr . uncurry + -- arr (\op (x,y) -> x `op` y) +``` + +`(***)` combines two arrows into a new arrow by running the two arrows on a +pair of values (one arrow on the first item of the pair and one arrow on the +second item of the pair). + + f *** g = first f >>> second g + +Block quote: + +> foo bar |