introspection/value_class_methods.rb

tests/_examples/introspection/value_class_methods.rb in the metorex repository.

# nil, true and false report the methods of their own classes, and each of
# those methods is owned by that class.
[nil, true, false].each do |value|
  listed = value.class.instance_methods(false).sort
  p(listed)
  p(listed.map { |name| value.method(name).owner }.uniq)
end
p(nil.method(:to_a).call)
p(true.method(:&).call(false))
p(false.method(:inspect).unbind.bind(false).call)
p(nil.method(:object_id).owner)

Output:

[:&, :===, :=~, :^, :inspect, :nil?, :rationalize, :to_a, :to_c, :to_f, :to_h, :to_i, :to_r, :to_s, :|]
[NilClass]
[:&, :===, :^, :inspect, :to_s, :|]
[TrueClass]
[:&, :===, :^, :inspect, :to_s, :|]
[FalseClass]
[]
false
"false"
Kernel