How to capture PrettyPrint output to string?

[List Recv]

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!

 

[Ryan Leavengood]

require 'pp'
require 'stringio'

def my_pp(*args)
old_out =3D $stdout
begin
s=3DStringIO.new
$stdout=3Ds
pp(*args)
ensure
$stdout=3Dold_out
end
s.string
end

 

[Gavin Sinclair]

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

 

[ara.t.howard]

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, "")

i usually use

PP.pp myvar, dump = ""

;-)

-a
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