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Re^5: Addional "year" matching functionality in word matching script

by Corion (Patriarch)
on Jun 28, 2016 at 08:41 UTC ( #1166730=note: print w/replies, xml ) Need Help??


in reply to Re^4: Addional "year" matching functionality in word matching script
in thread Addional "year" matching functionality in word matching script

You call find_year(), but you never print its output. For testing, you could start with:

for my $title ( "Let's party like it's 1999", "If 6 was 9", "If 6 was 9", "Summer of 69", "Disco 2000", ) { print $title , " => ", find_year($title), "\n"; }

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Re^6: Addional "year" matching functionality in word matching script
by bms9nmh (Novice) on Jun 28, 2016 at 14:06 UTC
    I can see this print each line in the title and the  => bit shows the year being extracted (not sure that's the right word) from the title.
    sub find_year { my( $str ) = @_; my $year; $year = $1 if( $str =~ /\b((?:19|20)\d\d)\b/ ); return $year } for my $title ( "Let's party like it's 1999", "If 6 was 9", "If 6 was 9", "Summer of 69", "Disco 2000", ) { print $title , " => ", find_year($title), "\n"; }
    One thing I'm not sure of is, I've tried to integrate the info above so that I can use the $title from a csv file rather than titles typed into the script (as in the above example). I have attempted this below but it's not working. I'd appreciate if someone could tell me what exactly i'm doing wrong. I know I'm being prompted to learn which I'm happy to do, but I think I would learn faster if someone told me what I have done wrong in the piece of code below.
    sub find_year { my( $str ) = @_; my $year; $year = $1 if( $str =~ /\b((?:19|20)\d\d)\b/ ); return $year } #get the title from csv3 open CSV3, "<csv3" or die; while (<CSV3>) { chomp; my ($title) = $_ =~ /^.+?,\s*([^,]+?),/; #/ match the title } for my $title { print $title , " => ", find_year($title), "\n"; }

      This second loop creates its own $title variable:

      for my $title { print $title , " => ", find_year($title), "\n"; }

      What you want instead is to integrate that call to find_year into your while loop:

      while( <...>) { ... my ($title) = ...; print "Have title '$title'\n"; print $title , " => ", find_year($title), "\n"; };
        Ok, thanks that's working nicely now that I'm printing it within the while loop. Is there any way to maintain the variable outside the while loop?

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