对what the Comonad typeclass is in Haskell有一些想法,我听说过Store的comonad。但看着Control.Comonad.Store.Lazy,我真的不明白。这是什么意思?它是为了什么?我听说Store = CoState是State Monad的双重身份。那是什么意思?
尝试安装无功与阴谋,我得到这个: src/FRP/Reactive/PrimReactive.hs:79:8:
Could not find module `Control.Comonad'
It is a member of the hidden package `comonad-1.1.1.6'.
Perhaps you need to add `comonad'