The Peterman Pod
The Peterman Pod
Ryan Peterman
Co-Creator of Haskell: Functional Programming, Thinking in Types, Useless Languages | Simon Jones
1 hour 27 minutes Posted Jun 8, 2026 at 10:00 am.
Simon Peyton Jones is the co-creator of Haskell (pure functional programming language) and I interviewed him about functional programming, why it matters, and his thoughts on other programming languages.• My ergonomic keyboard project I mentioned, you can follow along here: https://read.compose.llc/Podcast links:• YouTube: https://youtu.be/xcB_LF3cdqw• Apple: https://podcasts.apple.com/us/podcast/the-peterman-pod/id1777363835• Transcript: https://www.developing.dev/p/co-creator-of-haskell-functionalThank you to this episode's sponsor for supporting my work:• WorkOS: makes your app Enterprise Ready with easy to use APIs to add SSO, SCIM, RBAC, and more in just a few lines of code, check them out at https://workos.com/Timestamps:
Intro
What functional programming is
Downsides of functional programming
Specialized hardware for functional programming
Haskell is useless
Rust vs C
Haskell vs OCaml
Side effects in Haskell
Type systems
How the Haskell compiler works
Why Haskell is talked about more than used
Avoiding success at all costs
LLMs and programming languages
New programming language design
Should students continue to learn programming
Why Excel is his 2nd favorite programming language
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Simon Peyton Jones is the co-creator of Haskell (pure functional programming language) and I interviewed him about functional programming, why it matters, and his thoughts on other programming languages.• My ergonomic keyboard project I mentioned, you can follow along here: https://read.compose.llc/Podcast links:• YouTube: https://youtu.be/xcB_LF3cdqw• Apple: https://podcasts.apple.com/us/podcast/the-peterman-pod/id1777363835• Transcript: https://www.developing.dev/p/co-creator-of-haskell-functionalThank you to this episode's sponsor for supporting my work:• WorkOS: makes your app Enterprise Ready with easy to use APIs to add SSO, SCIM, RBAC, and more in just a few lines of code, check them out at https://workos.com/Timestamps:(00:00) Intro(00:39) What functional programming is(09:18) Downsides of functional programming(10:53) Specialized hardware for functional programming(21:47) Haskell is useless(25:59) Rust vs C(28:26) Haskell vs OCaml(35:26) Side effects in Haskell(44:26) Type systems(57:30) How the Haskell compiler works(01:04:35) Why Haskell is talked about more than used(01:09:07) Avoiding success at all costs(01:11:12) LLMs and programming languages(01:13:57) New programming language design(01:15:59) Should students continue to learn programming(01:22:33) Why Excel is his 2nd favorite programming language(01:25:04) Advice for his younger selfWhere to find Simon:• LinkedIn: https://www.linkedin.com/in/simonpj/• Wikipedia: https://en.wikipedia.org/wiki/Simon_Peyton_Jones• Personal Website: https://simon.peytonjones.org/Where to find Ryan:• Newsletter: https://www.developing.dev/• X/Twitter: https://x.com/ryanlpeterman• LinkedIn: https://www.linkedin.com/in/ryanlpeterman/• Threads: https://www.threads.com/@ryanlpeterman• Instagram: https://www.instagram.com/ryanlpeterman• TikTok: https://www.tiktok.com/@ryanlpetermanReferenced in this episode:• Haskell is useless: https://www.youtube.com/watch?v=iSmkqocn0oQ• John Backus Turing Award lecture: https://worrydream.com/refs/Backus_1978_-_Can_Programming_Be_Liberated_from_the_von_Neumann_Style.pdf• Why functional programming matters: https://www.cs.kent.ac.uk/people/staff/dat/miranda/whyfp90.pdf• Excel is his 2nd favorite programming language: https://www.youtube.com/watch?v=_M4P5M85KO8