Chaining & to_proc on symbol

Question

It\'s well known to Rubyist & will call to_proc on a symbol, so

[:a, :b, :c].map(&:to_s)

is equivalent to

Answer 1

There is no way to chain using the symbol to proc.

However, you could monkey patch a method to the class you are mapping over that will do both, then call that.

class Symbol
  def to_upcase_str
    self.to_s.upcase
  end
end

[:a, :b, :c].map(&:to_upcase_str)