http://viarails.net/q/How-to-sum-an-array-of-numbers-in-Ruby
According to the article above, .sum method for enumerables only works with Rails, not with regular Ruby code. That could be the reason why you get RE -- You received this message because you are subscribed to the Google Groups "Google Code Jam" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/google-code/b6555944-104c-4b65-a04b-d73495c80436%40googlegroups.com.
