What's the difference between scan and match on Ruby string

Question

I am new to Ruby and has always used String.scan to search for the first occurrence of a number. It is kind of strange that the returned value is in nested arra

Answer 1

#scan returns everything that the Regex matches.

#match returns the first match as a MatchData object, which contains data held by special variables like $& (what was matched by the Regex; that's what's mapping to index 0), $1 (match 1), $2, et al.