Pretty print in Nu

nicwilliams (Dr Nic Williams) — Fri, 18 Jul 2008 00:27:26 GMT

I miss the 'pp' helper method in Ruby. Fortunately Nu has "-description" method on objects, which is like a #to_pretty_print method in Ruby. So, implementing "pp" takes one line of code:



(function pp (obj) (puts (obj description)))

And for a demonstration:



$ nush

Nu Shell.

% (function pp (obj) (puts (obj description)))

(do (obj) ((puts (obj description))))

% (pp (array 1 2 3 (array "a" "b" 10)))

(

    1,

    2,

    3,

        (

        a,

        b,

        10

    )

)

Thanks to Patrick Thomson for this!

Load a Web page in Ruby and print information

jswizard (JavaScript Wizard) — Wed, 16 Aug 2006 21:36:10 GMT

Found at http://www.juretta.com/log/2006/08/13/ruby_net_http_and_open-uri/



require 'open-uri'

require 'pp'



open('http://www.juretta.com/') do |f|

  # hash with meta information

  pp  f.meta

   

  # 

  pp "Content-Type: " + f.content_type

  pp "last modified" + f.last_modified.to_s

  

  no = 1

  # print the first three lines

  f.each do |line|

    print "#{no}: #{line}"

    no += 1

    break if no > 4

  end

end

DZone Snippets: pp code

Pretty print in Nu

Load a Web page in Ruby and print information