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values_at 

        # StringScanner.values_at

(from ruby core)
---
    scanner.values_at( i1, i2, ... iN )   -> an_array

---

Returns the subgroups in the most recent match at the given indices. If
nothing was priorly matched, it returns nil.

    s = StringScanner.new("Fri Dec 12 1975 14:39")
    s.scan(/(\w+) (\w+) (\d+) /)       # -> "Fri Dec 12 "
    s.values_at 0, -1, 5, 2            # -> ["Fri Dec 12 ", "12", nil, "Dec"]
    s.scan(/(\w+) (\w+) (\d+) /)       # -> nil
    s.values_at 0, -1, 5, 2            # -> nil

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