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A comment on Thinking in Events: From Databases to Distributed Collaboration Software [video].

Re:Thinking in Events: From Databases to Distributed Collabo... by prennert on Thursday July 15, 2021 @08:19AM (#27843874)
Kleppmanns books (as this talk) references spreadsheets and the underlying programming model of Functional Reactive Programming. You essentially define a variable as a function of inputs it depends on, and it gets recalculated if any of the inputs change.

In a way it is quite a cool concept, because you can build a model that is based on some inputs and then it gets recalculated on-the-fly as the inputs change (or the model changes).

Is anyone aware of a language that supports this type of calculations in a nice way (outside of spreadsheet applications)?

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Re:Thinking in Events: From Databases to Distributed Collabo... by mikewarot on Thursday July 15, 2021 @09:48AM (#27844664)
Metamine is an experimental language that supports both reactive and procedural programming modes at the same time.

Here's a previous thread about it - https://news.ycombinator.com/item?id=27555940

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Re:Thinking in Events: From Databases to Distributed Collabo... by princesse on Thursday July 15, 2021 @10:09AM (#27844897)
Fwiw this is the core concept behind React, and it is approached in a nice way there as far as my opinion goes. I'm unclear about general purpose programming languages but seems like other comments have good suggestions
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Re:Thinking in Events: From Databases to Distributed Collabo... by xfer on Thursday July 15, 2021 @04:40PM (#27849854)
Adapton falls in this category of incremental computing. http://adapton.org/
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Re:Thinking in Events: From Databases to Distributed Collabo... by frumiousirc on Thursday July 15, 2021 @08:26AM (#27843940)
"Data flow programming paradigm" would be one term that describes the architecture for such a system. It is more general but if each node in the graph emits output only if novel input is received then one gets idempotency.

A Makefile (ie, for the "make" tool) or any of the similar build systems implement this pattern using file based data exchange (DFP graph edges) and graph nodes implemented as processes.

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Re:Thinking in Events: From Databases to Distributed Collabo... by lgas on Thursday July 15, 2021 @10:14PM (#27852393)
Oz is an interesting language that implements a data flow paradigm.

https://en.wikipedia.org/wiki/Oz_(programming_language)

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