refinements_for_array_extensions.md

🔒 Refinements for Scoped Array Extensions

Use Ruby refinements to apply array enhancements locally, avoiding global pollution and conflicts. Refinements allow patching core classes within defined scopes safely.

module ArrayMath
  refine Array do
    def dot(other)
      zip(other).map { |a,b| a * b }.sum
    end
  end
end

using ArrayMath
a = [1,2,3]
b = [4,5,6]
puts a.dot(b)   # => 32

# Outside this scope, Array#dot is undefined.