indexing - Get index of string scan results in ruby

Question

I want to get the index as well as the results of a scan

"abab".scan(/a/)

I would like to have not only

=> ["a", "a"]

but also the index of those matches

[1, 3]

any suggestion?

Answer 1

Try this:

res = []
"abab".scan(/a/) do |c|
  res << [c, $~.offset(0)[0]]
end

res.inspect # => [["a", 0], ["a", 2]]