Alexander Goldberg ayoshi
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| stack --resolver nightly-2015-10-22 install stylish-haskell \ | |
| hasktags hlint structured-haskell-mode ghc-mod pointfree base-prelude \ | |
| mtl-prelude pretty-show sr-extra ipprint ghci-pretty ihaskell |
ayoshi
/ gist:a85a05929ee97278e342
Last active
August 29, 2015 14:12
— forked from Niriel/gist:5311471
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| #! /usr/bin/python | |
| """Implementation of the arrow abstraction for functions. | |
| Abstracting functions with Arrows has advantages. Arrows make it very easy to | |
| compose functions (by simply 'multiplying' them with the `*` operator). The | |
| order in which the arrows are written match the order of the computations, | |
| making long pipelines easy to work with. Arrows also provide mechanisms for | |
| creating and merging branches, which helps when a value needs to be consumed by | |
| several functions, or when a function needs values from several sources. Arrows | |
| can also support conditional application, selecting which of two functions f and |