I'd put more emphasis on the fact that the first argument to split is always, always, always a regular expression (except for the one special case where it isn't :-). Too often do I see people write code like this:
@stuff = split "|", $string; # or worse ...
$delim = "|";
@stuff = split $delim, $string;
And expect it to split on the pipe symbol because they have fooled themselves into thinking that the first argument is somehow interpreted as a string rather than a regular expression.
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