named_captures

        # Regexp.named_captures

(from ruby core)
---
    rxp.named_captures  -> hash

---

Returns a hash representing information about named captures of *rxp*.

A key of the hash is a name of the named captures. A value of the hash
is an array which is list of indexes of corresponding named captures.

    /(?<foo>.)(?<bar>.)/.named_captures
    #=> {"foo"=>[1], "bar"=>[2]}

    /(?<foo>.)(?<foo>.)/.named_captures
    #=> {"foo"=>[1, 2]}

If there are no named captures, an empty hash is returned.

    /(.)(.)/.named_captures
    #=> {}