大家好。为了回答上述关于我和任一方的差异的问题，高笑在网上收集了相关信息。让我们与你分享并了解它。
I know I can usually just pattern match, but sometimes I would find these functions useful: isLeft= either (const True) (const False)
To help me learn Applicative Functors and Functors I thought it would be good fun to see how Either is implemented with the typeclasses Functor and Applicative. Obviously I could just go ahead and rea
I have some code like the below, where I have a list of Eithers, and I want to turn it into an Either of Lists ... in particular (in this case), if there are any Lefts in the list, then I return a Lef
I have two values, t1 and t2, of type Either String Type. The Left-value is used for error handling. These values are used in a function which returns Either String Type.
In Scala, I can have: trait Api { def someApiCall: Either[Failure, GoodResult]; } or object SomeObject { type SomeResult = Eit开发者_运维知识库her[Failure, GoodResult]
In my free time I\'m learning Haskell, so this is a beginner question. In my readings I came across an example illustrating how Either a is made an instance of Functor:
I was under the impression that there was an instance for Either a somewhere, but I can\'t seem to find it. I have tried importing Control.Monad, Control.Monad.Instances and Data.Either as shown
这两种用法都使用了邻近原则。具体用法是什么？我整理了下面的相关内容。让我们看看！
instance Monad (Either a) where return = Left fail = Right Left x >>= f = f x Right x >>= _ = Right x
加载中,请稍侯......