Practice with blocks - new_map method

practice_blocks-new_map

class Array

  def new_map
    a = []
    self.each do |item|
      a << yield(item)
    end
    a
  end

  
  def new_map!(&block)
    a = self
    b = self.new_map(&block)
    a.replace(b)
  end

end


a = [1, 2, 3]
a.new_map! { |i| i + 1 }
p a


b = [1, "two", :three]
b.new_map! { |i| i.class }
p b