21 lines
515 B
Markdown
21 lines
515 B
Markdown
lhs test
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========
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`unsplit` is an arrow that takes a pair of values and combines them to return
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a single value:
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~~~~ {.sourceCode .literate .haskell}
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unsplit :: (Arrow a) => (b -> c -> d) -> a (b, c) d
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unsplit = arr . uncurry
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-- arr (\op (x,y) -> x `op` y)
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~~~~
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`(***)` combines two arrows into a new arrow by running the two arrows on a
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pair of values (one arrow on the first item of the pair and one arrow on the
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second item of the pair).
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f *** g = first f >>> second g
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Block quote:
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> foo bar
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