Hello all,
I come from python world wishing to learn Ruby. Many small things are
impeading my learning process. Could someone show me the equivilant
methods in Ruby

warning python syntax below :)

1.) dir(obj) -> <returns list of all names in scope>

2.) help(obj) -> <no brainer>

3.) print obj.__doc__ --> <docstring>

4.) type(obj)

5.) id(obj)

any other helpful methods??