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Re: Split ( ) is Giving Me a Splitting Headache

by bpphillips (Friar)
on May 24, 2006 at 12:32 UTC ( #551342=note: print w/replies, xml ) Need Help??

in reply to Split ( ) is Giving Me a Splitting Headache

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

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[LanX]: # Pestis Africana Suum
[erix]: that's an old plan, I think. Isn't there already a danewal (or some such name)?
[marto]: Build with -Wall
[erix]: Danewerk
[LanX]: I seem to remember that the danewall was build by the Frankish empire against the Danes
[erix]: 500 AD thru viking age
[erix]: that would make sense but wikipedia thinks otherwise
[LanX]: oh me was wrong ...
[erix]: but it always works both ways of course
[LanX]: Funny some weeks ago, I met people from the Cimbrian peninsula who didn't know it's called the Cimbrian peninsula ...

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