Bit Shifting, Bitwise Comparisons and other Binary Number Magic (Solving Allergies on Exercism)

In this video, we explore 8 different approaches to solving Allergies, focussing on Binary numbers and techniques like bitshifting and bitwise comparison. We look at solutions from Clojure, Ruby, JavaScript, C#, Nim, Python, Gleam and Erlang! Kick back and enjoy 30mins of learning with Jeremy and Erik, then go solve the exercise in your favourite way on Exercism. Solve the exercise at: https://exercism.org/exercises/allergies Join #48in24 at: https://exercism.org/challenges/48in24 Featured Solutions: - https://exercism.org/tracks/clojure/exercises/allergies/solutions/amscotti - https://exercism.org/tracks/ruby/exercises/allergies/solutions/brodyf - https://exercism.org/tracks/javascript/exercises/allergies/solutions/ghjk - https://exercism.org/tracks/csharp/exercises/allergies/solutions/ErikSchierboom - https://exercism.org/tracks/nim/exercises/allergies/solutions/Rabidax - https://exercism.org/tracks/nim/exercises/allergies/solutions/Rabidax - https://exercism.org/tracks/gleam/exercises/allergies/solutions/Fryght - https://exercism.org/tracks/erlang/exercises/allergies/solutions/JordanAdams Timestamps: 00:00:00 Introduction 00:01:04 Clojure: series of boolean expressions, built-in function to test for bit set 00:03:48 C#: define flags enum with binary allergen scores to allow easy testing of bits set 00:12:39 Ruby: dictionary to map allergen to its score 00:17:25 JavaScript: use bit shifting and index to map allergen to its score 00:20:11 Nim: define allergen enum and cast score to set of matching enum values 00:21:56 Python: pre-calculate the allergies list in constructor 00:24:46 Gleam: pattern matching and higher-order function 00:27:49 Erlang: recursion, pattern matching and greater than comparisons 00:33:44 Conclusion