206K views · Nov 22, 2019 · 1:50:07 · 3 HN recommenders · 4 mentions · discussed 2020–2022
Tsoding live-codes a JSON parser from scratch in Haskell in about 111 lines, using only the standard library. It is an edited Twitch stream that explains the intuition behind parser combinators, functors, applicatives and monads.
Why Hacker News points people here: HN recommends it as a hands-on way to understand Haskell and parser combinators by watching a parser get built live.
“this guy writes a json parser live, giving his intuition along the way. It's helped me immensely.”HN comment, 2020
“this guy writes a json parser live, giving his intuition along the way. It's helped me immensely.”
Live-coded JSON parser in Haskell with intuition explained.
Agreed! I've been trying to learn haskell for a long time, and this guy writes a json parser live, giving his intuition along the way. It's helped me immensely. this video
“Some of the interesting random things I found there include”
Parser combinator in Haskell from Tsoding's streams.
I have recently discovered [tsoding twitch channel]( link ) which describes itself as Recreational programming. The topics range from webassembly and Game development to functional programming in haskell and ocaml. Some of the interesting random things I found there include: * [a parser combinator in haskell]( this video ) * [stack based language compiler in ocaml]( link ) You can find all the things that were done during the streams in link . You can also find his schedule at link
“He has another great video that covers a bunch of topics while making a JSON parser with only the Haskell standard library”
JSON parser using only Haskell standard library.
Nice to see Tsoding on the front page. He has another great video that covers a bunch of topics while making a JSON parser with only the Haskell standard library: this video
Parser combinators as natural use of monads.
To understand monads, I think it helps to know a language where expressing such a concept is more natural. Although I do not claim to know 100% what monads are yet, coming across these features made it easier for me to understand the concept a little bit. - Algebraic data types - OCaml's let expressions - F#'s computation expressions I also think that it is important to write something that naturally requires the use of monads. One thing that spring to mind is Parser Combinators. - link - this video
