Re: [Haskell-cafe] A brief note on n_k patterns and Hackage

ok:

On 5 May 2009, at 8:30 pm, Magnus Therning wrote:

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On Tue, May 5, 2009 at 1:04 AM, Richard O'Keefe wrote:

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I never really understood why it was thought to be relevant, but I was challenged to show that n+k patterns occurred in Hackage.

Why is it relevant?

Some people think that the popularity of a feature in an openly accessible collection of Haskell sources is relevant to whether it should continue to be supported, in a way that, say, appearance in textbooks, utility to beginners, and contribution to readability are not. Apparently.

This was the main reason it was kept in Haskell 98, 11 years ago. New textbooks don't use it (RWH doesn't talk or recommend the use of n+k)

I don't understand this. n+k patterns are the ONLY Haskell98 feature scheduled for removal from Haskell'.

For multiple reasons, summarised here: http://hackage.haskell.org/trac/haskell-prime/wiki/RemoveNPlusK -- Don