this post was submitted on 29 Aug 2023
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Python

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The Python dictionary dispatch pattern (jamesg.blog)
submitted 1 year ago by [email protected] to c/[email protected]
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[โ€“] [email protected] 4 points 1 year ago* (last edited 1 year ago)

not unique to python.

function pointers and hashmaps exist in basically all languages

like in lua:

local table = {
  add = function(a, b) return a + b end
}
table["add"](4, 5)

JavaScript:

{
  add: (a, b) => a + b
}

Rust (using hashmaps with string keys is extremely inefficient tho, there are much better options here but whatever)

let map = HashMap::from([
   ("add", |a, b| a + b),
]);

//...

map["add"](1, 3);