17: Applicative Functors LambdaCast podcast

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17: Applicative Functors

7+ y ago 58:44

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Content provided by LambdaCast. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by LambdaCast or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://staging.podcastplayer.com/legal.

Building on the power of functors we examine a few scenarios where a normal Functor is problematic. Fortunately, there is a closely related structure known as an Applicative Functor that can provide the capabilities to solve a broader range of problems. Episode 17 patrons: Chad Wooley David Keathley Andre Carvalho Show Notes: Coconut programming language: http://coconut-lang.org/ Hack nights instead of presentations: http://tech.noredink.com/post/142283641812/designing-meetups-to-build-better-communities class Functor f => Applicative f where pure :: Applicative f => a -> f a ap :: Applicative f => f (a -> b) -> f a -> f b Example of applicative usage: pure (+) <*> Just 3 <*> Just 2 -- this results in Just 5 (+) <$> Just 3 <*> Just 2 -- this is the same as above liftA2 (+) (Just 3) (Just 2) -- alternate form using lift instead of infix operators

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22 episodes

#Programming #Software Development #Functional Programming #LambdaCast #Tech

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17: Applicative Functors

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published 7+ y ago

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MP3•Episode home

Content provided by LambdaCast. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by LambdaCast or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://staging.podcastplayer.com/legal.

Building on the power of functors we examine a few scenarios where a normal Functor is problematic. Fortunately, there is a closely related structure known as an Applicative Functor that can provide the capabilities to solve a broader range of problems. Episode 17 patrons: Chad Wooley David Keathley Andre Carvalho Show Notes: Coconut programming language: http://coconut-lang.org/ Hack nights instead of presentations: http://tech.noredink.com/post/142283641812/designing-meetups-to-build-better-communities class Functor f => Applicative f where pure :: Applicative f => a -> f a ap :: Applicative f => f (a -> b) -> f a -> f b Example of applicative usage: pure (+) <*> Just 3 <*> Just 2 -- this results in Just 5 (+) <$> Just 3 <*> Just 2 -- this is the same as above liftA2 (+) (Just 3) (Just 2) -- alternate form using lift instead of infix operators

… continue reading

22 episodes

#Programming #Software Development #Functional Programming #LambdaCast #Tech

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