How to capture PrettyPrint output to string?

ruby-talk
1

I'd like to capture the output of pp (PrettyPrint) as a string, as
opposed to putting it on stdout.

Something like:
dump = myvar.pp

dump.class # => String

(Using .pretty_print_inspect is not adequate, as it's not the same as
pp, has no newlines, etc.)

Thanks!

···

--
Posted via http://www.ruby-forum.com/.

2

require 'pp'
require 'stringio'

def my_pp(*args)
  old_out = $stdout
  begin
    s=StringIO.new
    $stdout=s
    pp(*args)
  ensure
    $stdout=old_out
  end
  s.string
end

3

Hi,

At Thu, 8 Dec 2005 11:54:04 +0900,
List Recv wrote in [ruby-talk:169485]:

I'd like to capture the output of pp (PrettyPrint) as a string, as
opposed to putting it on stdout.

dump = PP.pp(myvar, "")

···

--
Nobu Nakada

4

List Recv wrote:

I'd like to capture the output of pp (PrettyPrint) as a string, as
opposed to putting it on stdout.

Something like:
dump = myvar.pp

http://extensions.rubyforge.org defines Object#pp_s which does what you
want. You can examine the implementation on the website.

The Facets/Core project may have something similar. Hopefully with a
nicer name!

This functionality is a screaming omission from the standard library!

Gavin

5

i usually use

   PP.pp myvar, dump = ""

:wink:

-a

···

On Thu, 8 Dec 2005, nobuyoshi nakada wrote:

Hi,

At Thu, 8 Dec 2005 11:54:04 +0900,
List Recv wrote in [ruby-talk:169485]:

I'd like to capture the output of pp (PrettyPrint) as a string, as
opposed to putting it on stdout.

dump = PP.pp(myvar, "")

--

ara [dot] t [dot] howard [at] noaa [dot] gov
all happiness comes from the desire for others to be happy. all misery
comes from the desire for oneself to be happy.
-- bodhicaryavatara

===============================================================================