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> Now Elixir has an equivalent to multi, the Protocol. For what it's worth, Clojure also has a much closer fit to Elixir Protocols called... a Protocol. https

by tekacs 5y ago

> Now Elixir has an equivalent to multi, the Protocol. For what it's worth, Clojure also has a much closer fit to Elixir Protocols called... a Protocol. https://www.braveclojure.com/multimethods-records-protocols/#Protocols https://www.braveclojure.com/multimethods-records-protocols/... They too can only dispatch on the type of the first argument, but are more structured (you can add multiple pieces of behavior at a time) and performant than multimethods where that's the behavior you're looking for.

tekacs 5y ago
I'll also leave these here, in case the conversation inevitably turns to pattern-matched function definition in Elixir. :) https://github.com/clojure/core.match https://github.com/clojure/core.match -- pattern matching as a library https://github.com/killme2008/defun https://github.com/killme2008/defun -- using core.match to implement Elixir/Erlang-like function definition https://github.com/noprompt/meander https://github.com/noprompt/meander -- advanced pattern matching, for some fun and flavor :) What's also fun is that core.match is implemented using a paper from INRIA on how to efficiently convert patterns into decision trees: https://github.com/clojure/core.match/wiki/Understanding-the-algorithm https://github.com/clojure/core.match/wiki/Understanding-the...
- jwhitlark 5y ago
  I've always loved that paper. Very readable, and gives good insights.
- SatvikBeri 5y ago
  If videos are more your speed, David Nolen, the primary author of that library (and article) has a talk about it as well: https://www.youtube.com/watch?v=TVJa-V6U-XI https://www.youtube.com/watch?v=TVJa-V6U-XI
didibus 5y ago
Elixir's Protocols actually were inspired by Clojure Protocols. Here's Jose Valim talking about it: > I’ve learned a lot also from Clojure because, at the time I was thinking about Elixir, Clojure was already around. I like to say it’s one of the top three influences in Elixir [...] > The main, the top three influences are Erlang, Ruby, and Clojure. [...] > I was like, no, but I’m going to call them protocols because there are a lot of similarities between Clojure and Elixir in terms of them being dynamic languages and in terms of the macro system. I was like, okay, I’m going to call them protocols because the closest thing we have today to what I want is Clojure And he goes on talking about more inspiration and similarities from Clojure like Agents, etc. Full exert is here: http://blog.cognitect.com/cognicast/120 http://blog.cognitect.com/cognicast/120

by tekacs 5y ago

tekacs 5y ago

I'll also leave these here, in case the conversation inevitably turns to pattern-matched function definition in Elixir. :) https://github.com/clojure/core.match https://github.com/clojure/core.match -- pattern matching as a library https://github.com/killme2008/defun https://github.com/killme2008/defun -- using core.match to implement Elixir/Erlang-like function definition https://github.com/noprompt/meander https://github.com/noprompt/meander -- advanced pattern matching, for some fun and flavor :) What's also fun is that core.match is implemented using a paper from INRIA on how to efficiently convert patterns into decision trees: https://github.com/clojure/core.match/wiki/Understanding-the-algorithm https://github.com/clojure/core.match/wiki/Understanding-the...

jwhitlark 5y ago
I've always loved that paper. Very readable, and gives good insights.
SatvikBeri 5y ago
If videos are more your speed, David Nolen, the primary author of that library (and article) has a talk about it as well: https://www.youtube.com/watch?v=TVJa-V6U-XI https://www.youtube.com/watch?v=TVJa-V6U-XI

didibus 5y ago

Elixir's Protocols actually were inspired by Clojure Protocols. Here's Jose Valim talking about it: > I’ve learned a lot also from Clojure because, at the time I was thinking about Elixir, Clojure was already around. I like to say it’s one of the top three influences in Elixir [...] > The main, the top three influences are Erlang, Ruby, and Clojure. [...] > I was like, no, but I’m going to call them protocols because there are a lot of similarities between Clojure and Elixir in terms of them being dynamic languages and in terms of the macro system. I was like, okay, I’m going to call them protocols because the closest thing we have today to what I want is Clojure And he goes on talking about more inspiration and similarities from Clojure like Agents, etc. Full exert is here: http://blog.cognitect.com/cognicast/120 http://blog.cognitect.com/cognicast/120