Assigning to $#a is a seldom-used way of truncating the array @a.   $#a = 4; arranges for the final index of @a to be 4. Hence, @a will hold 5 elements.

I find that using a slice makes the code more readable.   @a = @a[0..4];

In reply to Re: I've never seen this before - $#a = 4 - ?? by dws
in thread I've never seen this before - $#a = 4 - ?? by emilford

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