Ivan Lazar Miljenovic schrieb:
Yitzchak Gale g...@sefer.org writes:
While useful, I think its ubiquity to simplicity ratio is not
high enough to justify either depending on MissingH
just for that, or adding it to a base library.
Just like the swap :: (a,b) - (b,a) function a lot of people
On Wed, Aug 4, 2010 at 9:21 AM, Henning Thielemann
schlepp...@henning-thielemann.de wrote:
Ivan Lazar Miljenovic schrieb:
Yitzchak Gale g...@sefer.org writes:
While useful, I think its ubiquity to simplicity ratio is not
high enough to justify either depending on MissingH
just for that, or
On Tue, Aug 3, 2010 at 8:33 PM, Claude Heiland-Allen
claudiusmaxi...@goto10.org wrote:
{-# LANGUAGE TemplateHaskell, ScopedTypeVariables #-}
import Language.Haskell.Djinn (djinnD)
$(djinnD maybeToEither [t|forall a b . a - Maybe b - Either a b|])
main = print . map (maybeToEither foo) $
On 4 August 2010 18:40, Alexander Dunlap alexander.dun...@gmail.com wrote:
It's also nice for people reading code if common functions are
functions from common libraries. This allows readers' vocabulary of
common functions to increase, so they don't have to trawl through
someone's personal
Tom Davies wrote:
I find it convenient sometimes to convert a Maybe
value to an Either
maybeToEither = flip maybe Right . Left
Christopher Done wrote:
It's available in MissingH
While useful, I think its ubiquity to simplicity ratio is not
high enough to justify either depending on MissingH
Yitzchak Gale g...@sefer.org writes:
Tom Davies wrote:
I find it convenient sometimes to convert a Maybe
value to an Either
maybeToEither = flip maybe Right . Left
Remember, some people don't like flip! :p
maybeToEither = (`maybe` Right) . Left
While useful, I think its ubiquity to
I wrote:
maybeToEither = flip maybe Right . Left
Ivan Lazar Miljenovic wrote:
Remember, some people don't like flip! :p
maybeToEither = (`maybe` Right) . Left
Yes, absolutely!
...go ahead and upload it to Hackage
Just give it a good name, rather than fooToolkit, barToolkit, etc.
How
On 02/08/10 15:14, Tom Davies wrote:
I find it convenient sometimes to convert a Maybe value to an Either thus
(excuse the syntax, it's CAL, not Haskell):
maybeToEither :: a - Maybe b - Either a b;
maybeToEither errorValue = maybe (Left errorValue) (\x - Right x);
but that seemingly
I find it convenient sometimes to convert a Maybe value to an Either thus
(excuse the syntax, it's CAL, not Haskell):
maybeToEither :: a - Maybe b - Either a b;
maybeToEither errorValue = maybe (Left errorValue) (\x - Right x);
but that seemingly obvious function isn't in Hoogle, AFAICT, so
It's available in MissingH:
http://hackage.haskell.org/packages/archive/MissingH/latest/doc/html/Data-Either-Utils.html#v:maybeToEither
You can find this using Hayoo, which indexes Hackage.
MissingH is pretty huge, though, just for one function. It's kind of
annoying. I'm using this function in
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