awk extract multiple groups from each line

Question

How do I perform action on all matching groups when the pattern matches multiple times in a line?

To illustrate, I want to search for /Hello! (\\d+)/ an

Answer 1

This is gawk syntax. It also works for patterns when there's no fixed text that can work as a record separator and doesn't match over linefeeds:

 {
     pattern = "([a-g]+|[h-z]+)"
     while (match($0, pattern, arr))
     {
         val = arr[1]
         print val
         sub(pattern, "")
     }
 }