`man` command for IRB

irb-man.rb

module Kernel
  def man(obj)
    publ = obj.public_methods.sort - Object.public_methods - Kernel.public_methods
    puts "Public:\n#{publ.join(',  ')}"

    priv = obj.private_methods.sort - Object.private_methods - Kernel.private_methods
    puts "\nProtected:\n#{prot.join(',  ')}" unless prot.empty?

    prot = obj.protected_methods.sort - Object.protected_methods - Kernel.protected_methods
    puts "\nPrivate:\n#{priv.join(',  ')}" unless priv.empty?

    ivars = obj.instance_variables
    puts "\nInstance variables: #{ivars.join(', ')}" unless ivars.empty?
  end

  def man!(obj)
    publ = obj.public_methods.sort - Kernel.public_methods
    puts "Public:\n#{publ.join(',  ')}"

    priv = obj.private_methods.sort - Kernel.private_methods
    puts "\nProtected:\n#{prot.join(',  ')}" unless prot.empty?

    prot = obj.protected_methods.sort - Kernel.protected_methods
    puts "\nPrivate:\n#{priv.join(',  ')}" unless priv.empty?

    ivars = obj.instance_variables
    puts "\nInstance variables: #{ivars.join(', ')}" unless ivars.empty?
  end
end