Wfsp and stiller, thank you both. It worked. I now use 
for $record (@records){
    $duplicates{$_}++ for $record->src;
}

[download]

to store each sentence in a hash, with the number of times it appears. This is great.

I still need to change the $record->duplicate of each object to the number of times the sentence appears. Do I have to write a new loop for this, or can we do it at the same time we count the duplicate sentences?

I was thinking of something like this:

for $record (@records){
 $duplicates{$_}++ for $record->src;
 $record->duplicate++;
}

[download]

Thank you

In reply to Re^2: objects and duplicates by Anonymous Monk
in thread objects and duplicates by lkperl

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