w to write HASKELL code for functors of func
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
Can i know please how to write HASKELL code for functors of functors
![8
| Map a function over a Functor of Functors
--
9
Refresh...
>>> nestedMap (+1) [Just 1, Just 2]
[Just 2,Just 3]
1
2
Refresh...
>>> nestedMap (+1) [Just 1, Nothing]
[Just 2,Nothing]
3
4
Refresh...
>>> nestedMap (+1) (Just (Just 5))
Just (Just 6)
7
Refresh...
>>> nestedMap (+1) (Just Nothing)
Just Nothing
9
--
=> (a -> b) –> f (g a) -> f (g b)
nestedMap :: (Functor f, Functor g)
nestedMap
1
2
= undefined](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F42cade82-02de-4ace-9957-aef794461689%2F5b5a344e-6963-4e40-bbd3-6839d543d373%2F24ijwze_processed.png&w=3840&q=75)
Transcribed Image Text:8
| Map a function over a Functor of Functors
--
9
Refresh...
>>> nestedMap (+1) [Just 1, Just 2]
[Just 2,Just 3]
1
2
Refresh...
>>> nestedMap (+1) [Just 1, Nothing]
[Just 2,Nothing]
3
4
Refresh...
>>> nestedMap (+1) (Just (Just 5))
Just (Just 6)
7
Refresh...
>>> nestedMap (+1) (Just Nothing)
Just Nothing
9
--
=> (a -> b) –> f (g a) -> f (g b)
nestedMap :: (Functor f, Functor g)
nestedMap
1
2
= undefined
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