Function Join

metadata/metadata.go:149–157

Join joins any number of mds into a single MD. The order of values for each key is determined by the order in which the mds containing those values are presented to Join.

(mds ...MD)

// The order of values for each key is determined by the order in which the mds
// containing those values are presented to Join.
func Join(mds ...MD) MD {
	out := MD{}
	for _, md := range mds {
		for k, v := range md {
			out[k] = append(out[k], v...)
		}
	}
	return out
}

type mdIncomingKey struct{}
type mdOutgoingKey struct{}