print exception.backtrace.join("\n")と書くのに疲れた人へ

exception_print_backtrace.rb

# -*- encoding : utf-8 -*-

class Exception
  def print_backtrace(options = {:out => $stderr, :filters => []})
    out     = options[:out] || $stderr
    filters = options[:filters]
    filters = filters.nil? ? [] :
              filters.respond_to?(:to_ary) ? filters.to_ary :
              [filters]

    traces  = backtrace.to_a.reject{|line| filters.any?{|pattern| line.match(pattern)}}

    out.print "%s\n\n%s" % [self.to_s, traces.join("\n  ")]
  end
end