Grahame Dixon
Side Project Developer
Grahame Dixon
location_on Canada
Member since 1 year
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Grahame Dixon
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I'm a multi-disciplinarian with passions that have included fields such as farming with workhorses and the music theory of tuning. My current focus is coding in Elm, which is a delightful purely-functional programming language for building websites. I'm using Elm to build a game client for Codex, a complex strategy board game by David Sirlin which has a dedicated community of players willing to play online using forums and excel spreadsheets. Personally, I struggle a lot trying to play a card game on a spreadsheet, so I've been using Elm’s powerful use of pure functional programming to take the game design of Codex, with all of its interesting side effects, and building a solid game client for this so that the community can grow.
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Extending Railway Oriented Programming in Elm to Make Complex User Flows Simple
20 Mins
Talk
Intermediate
What do you do with a multi-step function with different kinds of user input that may be required at different steps?
I'm using Elm to build a game client for Codex, a complex strategy board game by David Sirlin with lots of interesting side effects in the game design. The pure functional programming of Elm is very powerful for managing these side effects, but how should I handle when there are many different kinds of user input required to complete the behaviour of a single feature?
There’s a “railway oriented programming” metaphor to understand how to handle multiple-steps of errors. I’ll extend this metaphor – with stations – to show how to make what looks like a complex functional problem into a simple pattern of abstraction.
Some familiarity with functional programming idioms is recommended, though the examples themselves are easy to follow. Attendees will walk away seeing functional programming applied in a fresh way, perhaps opening their mind to alternative perspectives to approach the complicated problems in their projects.
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