@tmp = () makes @tmp an array with zero elements. undef @tmp undefines @tmp. Check the output from: 

my @foo = qw(foo bar baz);
@foo = ();
print "\@foo is defined.\n" if defined @foo;

my @bar = qw(foo bar baz);
undef @bar;
print "\@bar is defined.\n" if defined @bar;

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Owl looked at him, and wondered whether to push him off the tree; but, feeling that he could always do it afterwards, he tried once more to find out what they were talking about.

In reply to Re: how to clear an array by HollyKing
in thread how to clear an array by pglenski

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