From the manual you evidentally didn't find (perldoc) :-)
perldoc -f split
split /PATTERN/,EXPR,LIMIT
split /PATTERN/,EXPR
split /PATTERN/
In your case, you're only passing in a single argument to split. Perl interprets this as
/PATTERN/ and implicitly uses
$_ as the
EXPR. Since
$_ hasn't been initialzed yet (hence the warning) nothing really happens (it's trying to split an undefined value on occurences of "Hello World").
What you need to do (besides taking a look at the perldoc entry for split) is use the two-argument usage of
split:
my $Phrase = "Hello World";
my @Parts = split(/ /, $Phrase); # split $Phrase on spaces
-- Brian
