I have to run a report from a csv file, i am stuck on the part where i want to keep only unique elements from column 1,if column 5 matches a certain string, displaying the count of how many duplicates there were.

I can get the count of all the names in the list with how may times thay appear but am lost on how to do a (while column1 and if column 5 = "????") bit

input
col1      col5       output
james     yes       james  2
dave      yes       dave   2
mike      yes       mike   3
ken       no        ken    1
jon       yes       jon    4
jon       no            
ken       yes            
jon       yes            
mike      no            
james      yes        
dave      yes            
mike      no            
ken       no            
jon       yes            
jon       yes

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this is a snippet of what i have so far 
my %seen;

while (<INPUT>)
{
    chomp;
    my $line = $_;
    my @elements = split (",", $line);
    my $col_name = $elements[1];
    my $col_type = $elements[5];
    
    $seen{$col_name}++;
}

while ( my ( $col_name, $times_seen ) = each %seen ) {
    my $loc_total = $times_seen ;
    print "     $col_name\t\t:  $loc_total\n";
    
}

[download]

In reply to keep only unique elements in an array displaying number of duplicates. by john.tm

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