incrementify_string.rb

module IncrementifyString
	# Helps create a user friendly unique string
	# For example, calling incrementify_string! repeatedly starting with
	# 'string' would yield:
	#   'string' => 'string1' => 'string2' => 'string3' ... 'string9' => 'string10' => 'string11' ... etc
  def incrementify_string!(bar)
    if bar.match(/[0-8]$/)
      bar.succ! # this is faster than regex parse and to_i + 1 to_s
    elsif bar.ends_with?('9')
      m = bar.match(/(\d+)$/)
      bar.gsub!(/\d+$/, (m[1].to_i + 1).to_s)
    else
      bar << '1'
    end
  end
end