Who is afraid of arrows, was Re: [Haskell-cafe] ANNOUNCE: Haskell
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dav.vire+haskell at gmail.com
Wed Oct 13 03:31:17 EDT 2010
2010/10/12 Gregory Crosswhite <gcross at phys.washington.edu>:
> Also, I don't see why one would prefer >>> over the standard function
> composition operator, ".".
With "." you have to read right-to-left to follow data's path.
For me that reading order isn't natural, and I imagine it is so for
most people which don't have a mathematical background.
Combined with >>= / >> you have multiple reading direction in the same
expression, as in
expression ( c . b . a ) `liftM` a1 >>= a2 >>= a3
reading order 6 5 4 1 2 3
So that could be one reason.
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