Functional programming and declarative programming

Published: 16 April 2024
on channel: Sergei Winitzki

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My thoughts about what "declarative programming" really is, and where functional programming stands in relation to declarative programming.

Talk slides: https://github.com/winitzki/sofp/blob...

Outline:

Functional programming is interesting, but in a weird way
FP is (almost) engineering
Other programming paradigms are (almost) artisanship
A definition of declarative programming:
A language for problem requirements, understandable to people
The same language is mechanically translated into code
The only known “silver bullet” of programming
Declarative programming must be domain-specific (DSL)
We get a productivity boost as long as we avoid the pitfalls
Implementing DSLs is a “killer app” for functional programming
FP is declarative for working with recursive data structures, such as labeled trees
Requires learning some programming language theory

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