transforming_map

🎨 Transforming Collections with map

Use map (also known as collect) to transform each element in an array and return a new array. It's perfect when you need to apply the same operation to every item.

numbers = [1, 2, 3, 4]
squares = numbers.map do |n|
  n * n
end
puts squares.inspect  # => [1, 4, 9, 16]