$ ghci GHCi, version 8.10.4: https://www.haskell.org/ghc/ :? for help Prelude> :doc many <interactive>:1:1: error: Not in scope: ‘many’ Any way to automatically determine the module to load and load it automatically in the command line? On 5/26/21, Francesco Ariis wrote:

Hello Peng,

Il 26 maggio 2021 alle 18:22 Peng Yu ha scritto:

...

I want to check the help page of a function in haskell. For example, to check the help page of "many", could anybody help me know to get to its help page? Thanks.

A quick way to do it is :doc inside ghci, like

λ> :doc head /O(1)/. Extract the first element of a list, which must be non-empty.

If you prefer something in your web-browser, hoogle can help you

https://hoogle.haskell.org/?hoogle=many&scope=set%3Astackage

Does this help? —F

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-- Regards, Peng