perl6 already has the kv thingy:
for @x.kv -> $index, $value {
  say $index, ' ', $value
}

[download]
(tested with rakudo, it works)
[]s, HTH, Massa (κς,πμ,πλ)

In reply to Re^2: Interesting Use for "state" Variables by massa
in thread Interesting Use for "state" Variables by liverpole

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