DZone Snippets: strip code

TextMate - Convert Tabs to 2 Spaces and Strip Whitespace

adamsalter (Adam Salter) — Mon, 19 May 2008 02:42:51 GMT

Command for TextMate (or any other editor really) to strip whitespace and convert tabs...
I only ever use 2 spaces so i've gone with that.



#!/usr/bin/env ruby



STDIN.read.each do |line|

  line.sub!(/^(\t+)/) { |c| '  ' * c.length }

  line.sub!(/(\s+)$/, "\n")

  puts line

end

String#stripped!

ntk () — Tue, 29 Apr 2008 18:45:38 GMT





#!/usr/local/bin/ruby -w



class String



   def stripped!                                 

      gsub!(/^[[:space:]]*|[[:space:]]*$/, '')   # whitespace characters: [ \t\r\n\v\f]

   end                                           # cf. http://en.wikipedia.org/wiki/Regular_expression



   def lstripped!

      sub!(/^[[:space:]]*/, '')

   end



   def rstripped!

      sub!(/[[:space:]]*$/, '')

   end



   def stripped_all!

      gsub!(/^[[:cntrl:]\x20]*|[[:cntrl:]\x20]*$/, '')   # control characters: [\x00-\x1F\x7F] and space character: \x20

   end                                                   # cf. http://en.wikipedia.org/wiki/ASCII#ASCII_control_characters



   def lstripped_all!

      sub!(/^[[:cntrl:]\x20]*/, '')

   end



   def rstripped_all!

      sub!(/[[:cntrl:]\x20]*$/, '')

   end



   def delete_cntrl!

      return self unless self =~ /[[:cntrl:]]/ 

      gsub!(/[[:cntrl:]]/, '')

      #str = gsub!(/[[:cntrl:]]/, '')   # alternative

      #str.nil? ? self : str

   end



end





p "".strip!       #=> nil

p "".stripped!    #=> ""



p "abc".strip!       #=> nil

p "abc".stripped!    #=> "abc"



p "abc\000".strip!           #=> "abc" (!)

p "abc\000".stripped_all!    #=> "abc"



p "abc\000\001".strip!           #=> nil

p "abc\000\001".stripped_all!    #=> "abc"



puts



p "".gsub!(/[[:cntrl:]]/, '')   #=> nil

p "a".gsub!(/[[:cntrl:]]/, '')  #=> nil



p "".delete_cntrl!    #=> ""

p "a".delete_cntrl!   #=> "a"







text = <<-EOS

 \r \x00 this is an example \t\x11 text  caf\303\251 \x20\x20\x20\x20 \r \f



  \011  \x10 \x07  \t\r\v\f abc \v\000 def \000 \x20\x20 \r  \v \r

EOS





puts "\n\n\e[1mOriginal text:\e[m\n"

text.each_line { |l| p l }



puts



puts "\n\e[1mString#stripped!\e[m\n"

text.each_line do |l| 

   l.stripped!

   p l

end



puts "\n\e[1mString#lstripped!\e[m\n"

text.each_line do |l| 

   l.lstripped!

   p l

end



puts "\n\e[1mString#rstripped!\e[m\n"

text.each_line do |l| 

   l.rstripped!

   p l

end



puts "\n\e[1mString#stripped_all!\e[m\n"

text.each_line do |l| 

   l.stripped_all!

   p l

end



puts "\n\e[1mString#lstripped_all!\e[m\n"

text.each_line do |l| 

   l.lstripped_all!

   p l

end



puts "\n\e[1mString#rstripped_all!\e[m\n"

text.each_line do |l| 

   l.rstripped_all!

   p l

end



puts "\n\e[1mString#delete_cntrl!\e[m\n"

text.each_line do |l| 

   l.delete_cntrl!

   #l.delete_cntrl!.stripped_all!

   p l

end

Using gsub with blocks to strip attributes from HTML tags

Adios (Adios , T.) — Sun, 18 Mar 2007 09:24:25 GMT

originally post here:
http://henrik.nyh.se/2007/03/03/using-gsub-with-blocks-to-strip-attributes-from-html-tags/



html = 'Getting rid of id attributes, but not in text: id="not this".' 



html.gsub(/<(.*?)>/) {|innards| innards.gsub(/ id=("|').*?\1/, '') }



# => Getting rid of id attributes, but not in text: id="not this".

strip punctuation

frenetic (Brad) — Tue, 28 Nov 2006 17:54:53 GMT

// strip punctuation



preg_replace('/[^a-zA-Z0-9-\s]/', '', "TAGholy! moley. & bat's were killed ^% by ; dogs, for £50");

Strip html tags

korakot (Korakot Chaovavanich) — Tue, 07 Mar 2006 07:57:00 GMT



import re

text = re.replace('<.*?>', '', html)