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Playing a Hand with Ruby Pattern Matching - Brandon Weaver - rubyday 2021 Ruby 2.7 introduced Pattern Matching, but what can you use it for? How about we play a few hands of poker to find out. This talk explores Pattern Matching patterns through scoring poker hands using named captures, pins, hash destructuring, array destructuring, and more. If you've been waiting for some practical examples of Pattern Matching this is your talk. The ninth edition of the Italian Ruby conference, for the third time organised by GrUSP, took place online on April 7th 2021. Speaker and details on https://2021.rubyday.it/
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### Summary of 'Playing a Hand with Ruby Pattern Matching' In this engaging talk presented by Brandon Weaver at RubyDay 2021, the focus is on utilizing the newly introduced Ruby 2.7 feature, Pattern Matching, through a lively theme of playing poker. Brandon elaborates on innovative use cases for Pattern Matching, particularly in the context of scoring poker hands. **Key Points Discussed:** - **Introduction to Pattern Matching:** - Pattern Matching is a new feature in Ruby 2.7 that allows for more elegant ways to handle data structures. - The discussion begins with a comparison of traditional Ruby syntax with the new pattern matching syntax. - **Creating Card and Hand Structures:** - Brandon demonstrates how to define a card and a hand using classes. - Constants are established for suits (Spades, Hearts, Diamonds, Clubs) and ranks (ranging from 2 to Ace) to provide structure and validation. - **Implementation of Scoring for Hands:** - The talk explores various poker hands and how to score them using Pattern Matching. - Examples include a royal flush (highest hand), straight flush, four of a kind, full house, flush, straight, three of a kind, and pairs. - Brandon illustrates how to match hands against defined patterns and checks conditions to determine the type of hand. - **Pattern Matching Techniques:** - The importance of a `deconstruct` method to allow classes to interface with pattern matching effectively. - Different methods are implemented for comparing cards and organizing them for scoring purposes. - **Potential Applications and Future Use:** - Brandon emphasizes the broader implications of Pattern Matching in Ruby, including potential uses in real-world applications like data processing and HTTP response matching. - He encourages further exploration and utilization of this feature in various programming contexts. **Conclusions and Takeaways:** - Pattern Matching is an exciting and powerful feature that enhances Ruby’s capabilities, especially in terms of code clarity and readability. - The community is encouraged to experiment with Pattern Matching to unlock its full potential for diverse programming challenges. - Brandon wraps up by thanking contributors to the development of this feature and advocates for its adoption in more libraries and frameworks, noting ongoing community efforts to enhance Ruby development overall.
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