Feature #6824
Updated by nobu (Nobuyoshi Nakada) over 13 years ago
=begin I'd like to add a method to StopIteration that returns an instance of the enumerator which triggered this exception. Eg: enum = [].each begin begin enum.next rescue StopIteration => ex puts "same" if ex.source == enum end This is useful when you're merging multiple collections using min/max - when one of the collections is exhausted it can be easily ignored. enumerators = 100.times.map do rand(100).times.map do rand end.sort.each end merged = [] while !enumerators.empty? begin begin enumerators.map(&:peek) values = enumerators.map(&:next) merged += values.sort rescue StopIteration => e enumerators.delete(e.source) retry end end end fail unless merged != merged.sort Attached is a patch against trunk. =end