There was a formatting error in u671296's code. The line $positions{$key} = $pos; should read $positions{$key} = [$pos];, in order to create an array reference. Then the push in the else branch will have an array reference to push into, rather than just a scalar number.

In reply to Re^3: Multiple Key Problem help by lostjimmy
in thread Multiple Key Problem help by ashnator

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