You were probably doing something like this:
my ($ip) = gethostbyname("slashdot.org");
In that code, $ip is in a list, and the statement is in list
context, so the statement is equivalent to:
my ($ip, undef, undef, undef, undef) = gethostbyname("slashdot.org");
which will put the name in returned from gethostbyname
in $ip.
Aside: This is the reason I rail against unnecessary
parenthisation in perl programs---there can be nasty context bugs until
you get used to it.
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