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         


        

Answer 1

Very similar to what @jim has said and works a bit better for longer strings:

def matches str, pattern
    arr = []
    while (str && (m = str.match pattern))      
        offset = m.offset(0).first 
        arr << offset + (arr[-1] ? arr[-1] + 1 : 0)
        str = str[(offset + 1)..-1]
    end
    arr
end