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Comment by PaulRobinson | Hacker News Reader

What are you using under the hood?

I’ve been using poker-eval for a few projects but it seems its now abandonware, with few updates out there.

I’m tempted to port it to Go and/or Rust to keep it alive, but I’m interested in what else people are using out there for poker hand evaluation.

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If you don't need everything that's going on in poker-eval, you should be able to roll your own two dozen lines of Python.

A poker hand evaluator is problem #54 at Project Euler. [0] Peter Norvig has a solution there (which you can view after you submit your own correct solution) that taught me a lot about Python-style and how it differs from C++ (which was my mindset at the time).

[0] https://projecteuler.net/problem=54

That's very nice, much shorter than mine. array[[i][/i]r] had me scratching my head for a few minutes, when I realized those were stray italic tags. My only complaint is he doesn't check for the wheel, but to be fair most solutions don't seem to.

The wheel is excluded by the problem definition (or rather, not specifically included). The ace only counts as a high card here.

Fair enough. I think the problem statement does not have enough information by itself (especially concerning how rank is used to break ties for two pairs), and so it invites people to fill in the blanks using their knowledge of the game.

> The wheel is excluded by the problem definition (or rather, not specifically included).

Excluded was correct, if only indirectly: a straight is defined as five cards of consecutive value and aces are explicitly the highest (and not also the lowest) values, so the wheel is not a valid straight by the definition given.

It's not apparent to me which part of evaluating poker hands would need to be updated over time... Just rebuilding for new framework versions?

Evaluating quality source code:

1. Does it have a badge that says "build passing"?

2. Does it have a bunch of stars on GitHub?

3. Does it have a commit in the past week?

If so, wrap that in an npm package and publish it.

Otherwise, it's AbAnDoNwArE.

This is actually a side-project of a side-project, so I wanted to have a go at building the algo myself for a bit of fun/learning. I’m using Ruby under the hood...

Here's an implementation in Clojure that scores hands and selects a winner. It handles low vs high ace in straights.

https://gist.github.com/mchampine/dca965226148dfd19d5e4d7f3d...

Most of it was done for a weekly Clojure programming challenge run by Eric Normand in his PurelyFunctional.tv newsletter. You can see all the entries at https://gist.github.com/ericnormand/fbc9b6386a66c1ece590930d...

For Python I'd recommend: https://github.com/worldveil/deuces

Im using a two plus two hand evaluator i found in Java. Curious as well couldn’t find good open source ones

The Twoplustwo evaluator is open source ("GPL, use as you like" specifically)

Third party repo: https://github.com/tangentforks/TwoPlusTwoHandEvaluator

Original statement of license: https://forumserver.twoplustwo.com/showpost.php?p=1482536&po...

https://github.com/andrewprock/pokerstove

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