pattern_matching_arrays

🧩 Destructuring Nested Arrays with Pattern Matching

Ruby 3’s pattern matching can unpack complex nested arrays in a concise way. Use the in keyword in case or within method parameters to extract values, ignoring or capturing rest elements. This makes your code more declarative and reduces manual indexing.

def analyze(data)
  case data
  in [user_id, [year, month, day], *tags]
    puts "User #{user_id} on #{year}-#{month}-#{day} with tags: #{tags.inspect}"
  end
end

data = [42, [2023, 8, 15], 'ruby', 'arrays']
analyze(data)