rbx issue

00 stub_code_snippet.rb

require 'strscan'

module StringStubber
  WORD = /\w+[\!\.\?]*[^\s,]/

  def scanner
    @scanner ||= StringScanner.new(self)
  end

  # Scans ahead one word position, and returns it
  #   @param [StringScanner] scanner
  #   @return [String]
  def scan_word(scanner)
    scanner.scan_until(WORD)
  end

  def stub_words(max_words, save_pos=false)
    scanner.reset unless save_pos

    if max_words < 0
      rev_stub_words(max_words.abs, save_pos)
    else
      scan_words(scanner, max_words)
    end
  end

  #   @param [Fixnum]
  #   @param [true, false]
  def rev_stub_words(max_words, save_pos=false)
    str = self.reverse
    str.scanner.pos = 0 - scanner.pos if save_pos

    stub = str.stub_words(max_words, save_pos).reverse!
    scanner.pos = 0 - str.scanner.pos
    return stub
  end

  def scan_words(scanner, max_words)
    words = max_words.times.map {
              scan_word(scanner)
            }
    words.compact!
    words.join
  end
end

class String
  include StringStubber
end

str = "Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Vivamus vitae risus vitae lorem iaculis placerat."

puts str
puts str.stub_words(-5)

gistfile2.txt

sgonyea@skg:~/tmp$ rvm use ruby-1.8.7 && ruby stub_rbx.rb
Using /Users/sgonyea/.rvm/gems/ruby-1.8.7-p334
Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Vivamus vitae risus vitae lorem iaculis placerat.
risus vitae lorem iaculis placerat.
sgonyea@skg:~/tmp$ rvm use ruby-1.9.2 && ruby stub_rbx.rb
Using /Users/sgonyea/.rvm/gems/ruby-1.9.2-p180
Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Vivamus vitae risus vitae lorem iaculis placerat.
risus vitae lorem iaculis placerat.
sgonyea@skg:~/tmp$ rvm use rbx && ruby stub_rbx.rb
Using /Users/sgonyea/.rvm/gems/rbx-head
Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Vivamus vitae risus vitae lorem iaculis placerat.
tema tis rolod muspi meroL
sgonyea@skg:~/tmp$