From: Phrogz <gavin@...>
Date: 2006-12-27T02:50:08+09:00
Subject: Re: Newby - how to round up floating point number?

Dermot Moynihan wrote:
> Learned a lot from all your posts. Even that p can be written instead of
> puts!

For what it's worth, the 'p' method spits out the result of calling
#inspect on each argument, while the 'puts' method spits out the result
of calling #to_s on each argument.

For numbers, the two are identical; not so for other beasts. For
example:
  puts "Hello"
  #=> Hello

  p "Hello"
  #=> "Hello"

  puts ['a',1,false,/hello/]
  #=> a
  #=> 1
  #=> false
  #=> (?-mix:hello)

  p ['a',1,false,/hello/]
  #=> ["a", 1, false, /hello/]

For many objects, the result of calling #inspect is a string that is
more like source code (though it doesn't have to be) and generally
gives you a better idea of the structure of the object.