The benefits are @mail -v- @$mail and $mail[ 0 ] -v- $mail->[ 0 ], if the array contains just scalars, Where it really comes into it's own is if the array contains further nested structures. 

local *mail = ...
$mail[ 3 ]{ recipient } = $mail[ 2 ]{ sender };

## is easier on the eyes and fingers than

$mail->[ 3 ]{ recipient } = $mail->[ 2 ]{ sender };

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In reply to Re^3: Reference Notation by BrowserUk
in thread Reference Notation by Anonymous Monk

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