Re: Who is afraid of arrows, was Re: [Haskell-cafe] ANNOUNCE: Haskell XML Toolbox Version 9.0.0

2010/10/13 Henning Thielemann :

David Virebayre schrieb:

...

2010/10/12 Gregory Crosswhite :

...

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.

http://www.haskell.org/haskellwiki/Direction_of_data_flow

Very informative link, thanks. Fortunately the time when I was struggling with all that is gone; Even though right-to-left still isn't "natural" to me, I've now written enough haskell so that isn't a problem anymore. I don't even try to use >>> redefine a left-to-right composition operator in my programs, I'm converted ! My previous post was just me remembering my (past) problems with "." to answer Gregory's question. David.