Ruby String to_boolean monkey patch with Dutch i18n

string_ext.rb

class String
  def to_boolean
    return true   if self == true   || self =~ (/(true|t|yes|y|1|ja)$/i)
    return false  if self == false  || self.nil? || self.empty? || self =~ (/(false|f|no|n|0|nee)$/i)
    raise ArgumentError.new("invalid value for Boolean: \"#{self}\"")
  end
end