Convenience method for removing patterns from strings.

gistfile1.rb

class String
  
  # "Hello says Bob" - "Bob" 
  #=> "Hello says "
  # "Hello says Bob" - /l+/
  #=> "Heo says Bob"
  #
  # @param [String, Regexp] pattern either a string or regular expression to remove from the string.
  # @return [String] a copy of the string with the pattern remvoed
  def -(pattern)
    gsub(pattern, "")
  end
end