From: Henrik Horneber <ryco@...>
Date: 2004-09-23T16:54:40+09:00
Subject: whitespace string only

Hi!

What's the best way to test if a string only consists of whitespaces and 
newlines?

best I could come up with is


class String

   def is_whitespace_only?
     strings_to_test = split("\n")
     whitespace = /^\s+$/
     is_whitespace_only = true
     strings_to_test.each{ |str|
       unless whitespace.match(str) or str.empty?
         is_whitespace_only = false
	break
       end	
     }
     is_whitespace_only
   end

end

But somehow I think there should be a better way to do it. Any ideas?
Is it okay to add such methods to class String itself?

Any advices appreciated.

regards,
Henrik