# London Haskell Meetup

**URL:** <https://discourse.haskell.org/t/london-haskell-meetup/14758>\
**Category:** Events\
**Created:** [September 27, 2026, 8:02pm UTC](https://discourse.haskell.org/t/london-haskell-meetup/14758 "2026-09-27T20:02:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![L0neGamer](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.haskell.org/l0negamer/32/4536_2.png) [@L0neGamer](https://discourse.haskell.org/u/L0neGamer)\
**Post date:** [September 27, 2026, 8:02pm UTC](https://discourse.haskell.org/t/london-haskell-meetup/14758/1 "2026-09-27T20:02:15Z")

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Calling all Londoners (and people who can get to London)!

On **Thursday 15th of October** , we will be running a pair of talks at the Artificial office.

If you’re interested, sign up to the [event](https://luma.com/aslwdv0g)! There are more details in the event link.

If you’re interested in submitting a talk, please use the [form](https://docs.google.com/forms/d/e/1FAIpQLSdooVoZbGVjCuPHgmBwRG-l6JjmsUyjawNroVpt8t9Y-x_pkw/viewform?usp=dialog). If you have any questions, please email us at `london.haskell.meetup [AT] gmail.com`.

_NOTE: in future, I’ll post further event notifications to this thread_

## The Talks

### How I Use Haskell for 3D Printing

_by Joe Warren_

“Programmable CAD” is a category of software where objects are defined using code.

This talk covers

- How I’ve used programmable CAD to design parts for 3D printing
- Why I think Functional Languages are uniquely suited for programmable CAD
- Why I decided to write a programmable CAD framework
- Why this lead me to explore the GHC Web Assembly backend
- And how the Scala Logo lead me to decorate a Christmas tree

### Lazy Streams with Constant-Time Access

_by Andrew Lelechenko_

We discuss a data structure for lazy infinite compact streams with cache-friendly O(1) indexing and its applications to memoization, dynamic programming, cellular automata and recursive functions.

## Other discussion links

- [Reddit](https://www.reddit.com/r/haskell/comments/1wru48i/london_haskell_meetup_october/)
- [Bluesky](https://bsky.app/profile/haskell.org/post/3mwjtfepas22x)
- [Mastodon](https://fosstodon.org/@haskell/117345324620022800)

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**Author:** ![gregbm](https://avatars.discourse-cdn.com/v4/letter/g/4da419/32.png) [@gregbm](https://discourse.haskell.org/u/gregbm)\
**Post date:** [September 28, 2026, 6:08am UTC](https://discourse.haskell.org/t/london-haskell-meetup/14758/2 "2026-09-28T06:08:43Z")

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Very cool that you guys will have a talk about Haskell for 3d printing. Waterfall CAD is very nice and I think it deserves more attention.