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Today's Topics:
1. Haskell mentors/tutors website? (K?ra)
2. Re: multi-parameter typeclass with default implementation
(Erlend Hamberg)
3. How can I keep delimiters in splitRegex? (S. H. Aegis)
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Message: 1
Date: Thu, 29 Aug 2013 01:59:58 -0400
From: K?ra <[email protected]>
To: [email protected]
Subject: [Haskell-beginners] Haskell mentors/tutors website?
Message-ID:
<CABhyRUii_SxEPxHc_DXxkEckDJHsn=HpYVruPF0DbL_kW_W=7...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Is there an existing website to connect haskell mentors and mentees? I'm
thinking of something along the lines of railsmentors (except, of course,
with haskell support).
I suppose it doesn't have to be Haskell specific, as long as it's a
supported language. Codementor.io
<http://www.codementor.io/?rid=4506073984>seems like a really cool
option along those lines, but it would also be
valuable to have a network for volunteer mentors.
The closest I have seen is Haskellers, which is not about mentorship, but
instead only about hiring and job hunting.
P.S. Are there any LGBTQIA/female/disabled people of color on this list who
would be willing to teach myself and other folks from the Empowermentors
Collective?
http://kxra.tumblr.com/post/54139122042/please-signal-boost-the-empowermentors
Thanks!
K?ra
--
Board of Directors, Free Culture Foundation: www.freeculture.org
Web: kxra.info - StatusNet Microblog: http://identi.ca/kxra
Email: [email protected] - SMS: +1.617.340.3661
Jabber/XMPP: [email protected] - IRC: kxra @freenode @oftc @indymedia
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Message: 2
Date: Thu, 29 Aug 2013 08:31:55 +0200
From: Erlend Hamberg <[email protected]>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Subject: Re: [Haskell-beginners] multi-parameter typeclass with
default implementation
Message-ID:
<ca+g9oxn3bwmpopxf2waizceh0-m7h2rw1n898nzocy3f79b...@mail.gmail.com>
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You could also use functional dependencies here:
{-# LANGUAGE FunctionalDependencies #-}
class Foo a b | a -> b where
bar :: a -> Int
foobar :: a -> b -> Int
foobar avalue bvalue = bar avalue
instance Foo Int Int where
bar i = 5
main = print $ bar (4::Int)
Here you are saying that the type parameter b is determined by the
parameter a, so GHC knows that the instance Foo Int Int is the only
instance of Foo with a = Int, thus removing the ambiguity.
--
Erlend Hamberg
[email protected]
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Message: 3
Date: Thu, 29 Aug 2013 16:02:52 +0900
From: "S. H. Aegis" <[email protected]>
To: "[email protected]" <[email protected]>
Subject: [Haskell-beginners] How can I keep delimiters in splitRegex?
Message-ID:
<cajp-nqx1-sjawbusgdfeeo-p1cbumu51mmpc38f0tdla1cc...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hi. I'm newbee to Haskell.
I want to keep delimiters in splitRegex like 'keepDelimsR'.
I try...
splitRegex (keepDelimsR (mkRegex "2013[0-9]{11}AH02")) myDataString
but It doesn't work.
How can I keep delimiters in splitRegex?
Have a nice day.
Thank you.
S. Chang.
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