Hi opaltoot,
See Assignment Operators:
... the scalar assignment operator produces a valid lvalue. Modifying an assignment is equivalent to doing the assignment and then modifying the variable that was assigned to. This is useful for modifying a copy of something, like this:
($tmp = $global) =~ tr/13579/24680/;
... Likewise,
($x += 2) *= 3;
is equivalent to
$x += 2;
$x *= 3;
Hope this helps, -- Hauke D
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