Ruby equivalent of Python's “dir”?

Question

In Python we can \"dir\" a module, like this:

>>> import re
>>> dir(re)

And it lists all functions in the module. Is ther

Answer 1

I'd go for something like this:

y String.methods.sort

Which will give you a yaml representation of the sorted array of methods. Note that this can be used to list the methods of both classes and objects.

Answer 2

Tip for "searching" for a method in irb:

"something".methods.select {|item| item =~ /query/ }

Tip for trying out methods on a value for comparison:

value = "something"
[:upcase, :downcase, :capitalize].collect {|method| [method, value.send(method)] }

Also, note that you won't get all the same information as Python's dir with object.methods. You have to use a combination of object.methods and class.constants, also class.singleton_methods to get the class methods.

Answer 3

I would have made this a comment to jonelf's answer, but apparently I don't have enough rep.

some_object.methods.sort - Object.new.methods

This isn't exactly what you were asking as others have said, but it gives you the info you are after.