Turns the symbol into a simple proc, which is especially useful for enumerations. Examples:

  # The same as people.collect { |p| p.name }
  people.collect(&:name)

  # The same as people.select { |p| p.manager? }.collect { |p| p.salary }
  people.select(&:manager?).collect(&:salary)

[Source]

# File lib/core_extensions.rb, line 52
    def to_proc
        Proc.new do |obj, *args|
            obj.send self, *args
        end
    end