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What do people use Prolog for in the real world? I learned about it on a university course and it seems so esoteric compared to other things on the course. Like something invented just for computer scientists to enjoy.
I haven’t used Prolog, but I have a little experience with Erlang and a lot with Elixir. As I understand it, the early versions of Erlang were inspired by Prolog. For those with familiarity with both Prolog and Erlang, can you comment on the similarities and differences between? Is/was Erlang basically Prolog with OTP bolted on?
% Prolog
next_light(green, yellow).
next_light(yellow, red).
next_light(red, green).
% Erlang
next_light(green) -> yellow;
next_light(yellow) -> red;
next_light(red) -> green.
- `;` in Erlang indicates multi clause function
- In Prolog next_light is database, in Erlang it's just a function
Question: What's the light before green?
% Erlang
% Returns actual value
prev_light_search() ->
[State || State In a nutshell Erlang is more like: "when I have X, then I can calculate Y" and Prolog like "If I want Y, what's the X".
What do people use Prolog for in the real world? I learned about it on a university course and it seems so esoteric compared to other things on the course. Like something invented just for computer scientists to enjoy.
Where in imperative programming languages you supply arguments to a function and get a result in Prolog you can give the result of a function call and get all argument sets that lead to that result.
But you are right that in production systems you would seldom see Prolog, for reason that you can easily LLM.
What do people use Prolog for in the real world? I learned about it on a university course and it seems so esoteric compared to other things on the course. Like something invented just for computer scientists to enjoy.
I have a application that has actions and actions can happen pretty much in any order. By default all scenarios should be an error except for ones that are in the boundary of logical steps, e.g.
login -> ...[!logout]... -> logout
login -> ...[!logout]... -> dashboard
upload -> ... -> view_file
So I have ~50 actions, ~30 constraints which generate >200 scenarios which then are transformed into test suite.
Yet in short: Prolog is useful everywhere it's simple to express a rule but not that easy to implement it.
What do people use Prolog for in the real world? I learned about it on a university course and it seems so esoteric compared to other things on the course. Like something invented just for computer scientists to enjoy.
Not used. Quote about prolog: The elegant solution is not efficient. The efficient solution is not elegant.
now we may have a more powerful "Prolog" - LLM Agent, though not precise and correct somtimes.
Radio Yerevan: A listener asks: "Is it true that in Moscow, on Red Square, they are giving away cars?"
Our answer: "Yes, it is true. Except it isn't in Moscow, but in Leningrad. And it isn't on Red Square, but on Palace Square. And they aren't cars, but bicycles. And they aren't giving them away, they are stealing them."
What do people use Prolog for in the real world? I learned about it on a university course and it seems so esoteric compared to other things on the course. Like something invented just for computer scientists to enjoy.
What do people use Prolog for in the real world? I learned about it on a university course and it seems so esoteric compared to other things on the course. Like something invented just for computer scientists to enjoy.
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