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Home: Perl Programming Help: Beginner:
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BillKSmith
Veteran

Oct 27, 2010, 3:45 PM

Post #26 of 26 (1099 views)
Re: [Jeff29] Parsing a text file and outputting to an excel sheet [In reply to] Can't Post

The syntax for uniq is: uniq LIST

It returns a list with duplicates removed from the argument list.

There is a clever idiom that allows you to keep track of items you have already seen (or printed).


Code
my %seen;  

print $cr_line, $match, $resolution_link, "\n" if ! $seen{$cr_line}++ ;



The hash declaration must be before any loops which include the print. When the loop completes, the hash contains the number to times each line was seen (only the first of each was printed). It is fun to try and figure out how this works.
Good Luck,
Bill

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