Paul Chiusano

Functional programming, UX, tech

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About my book

My book, Functional Programming in Scala, uses Scala as a vehicle for teaching FP. Read what people are saying about it.


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Unison: a friendly programming language from the future
unison.cloud: the worldwide elastic computer (coming soon)
Type systems and UX: an example
CSS is unnecessary

Unison update 7: structured refactoring sessions

As I mentioned in update 6, I’ve been spending the last few weeks doing some much-needed refactoring. Here’s an update on the progress:

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Unison update 6: refactoring, technical debt, and motivation

No new screencasts to show this week. I’m in the middle of doing some much-needed refactoring. What happened? As of the last update, I had a decent expression editor. The missing final piece was adding a declaration layer to the editor, allowing a Unison panel to be edited much like a module in a regular programming language.

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I hate type errors!

I hate type errors!

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Unison update 5: a better spreadsheet

Here’s a video of the latest progress. In this video, I create the term view reactive (1 + 1), which displays in the editor as 2. This might not seem like much, but the ability to define reactive views like this is the first step in allowing Unison panels to be used much like a spreadsheet, where the user fills in values and other parts of the panel are updated in response. There’s also a few other things shown which I’ll talk through below:

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Unison update 4: more editor interactions

Here’s a video of the latest progress. Watch me write the expression 1 + 1, then evaluate it!! Further explanation below.

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