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Pattern Matching is an upcoming Ruby 2.7 feature. As an elixir enthusiast and a professional Rubyist, I installed Ruby 2.7 and tried out the feature. I would like to show to pattern matching is implemented in Ruby, it’s potential and what could be improved.
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In the video "Pattern Matching In Ruby 2.7" presented by Tae Noppakun Wongsrinoppakun at RubyConf TH 2019, the speaker discusses the new pattern matching feature introduced in Ruby 2.7. Tae, a professional Rubyist and Elixir enthusiast, explores how this feature compares to similar functionalities in Elixir and addresses its advantages and shortcomings. Key points discussed in the video include: - **Introduction to Pattern Matching**: Tae begins by outlining his background and how he became acquainted with pattern matching through Elixir, a functional programming language that allows users to deconstruct complex data structures efficiently. - **Comparison with Elixir**: Pattern matching in Elixir offers method overloading not typically found in Ruby, allowing for more direct variable assignments and checks for data structure values. Species of arrays and maps are illustrated to showcase their functionality. - **Syntax Overview in Ruby**: Tae explains Ruby’s method for pattern matching through its `case` statements, which allows users to specify patterns using `when` and evaluate conditions straightforwardly. He provides examples where Ruby's pattern matching significantly simplifies array and hash operations by binding variables concisely. - **Advanced Features**: The speaker introduces various operators used in pattern matching, such as pin operators and ignore operators, that enhance the binding and evaluation of variables. He also mentions the new assignment operator for checking keys within hashes and how it simplifies interactions with collections. - **Performance and Limitations**: While recognizing the potential of pattern matching to increase Ruby’s expressiveness, Tae addresses some limitations like verbosity and execution speed, finding it slower compared to standard hash lookups. He expresses his hope for improvements in syntax for ease of use. - **Conclusion**: Tae wraps up with an acknowledgment of the efforts made to integrate pattern matching in Ruby while highlighting the need for continued development to fully exploit its capabilities in a way that aligns more closely with the intuitiveness found in Elixir. Overall, Tae's presentation not only illuminates the advancements being made in Ruby 2.7 but also provides a critical lens on how these changes can lead to improved coding practices. The presentation concludes with a call for continued refinement in syntax alongside the encouragement to adapt to new functionalities within Ruby's evolving landscape.
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