in reply to Re^2: Compare 2 CSV files and create a new CSV file out of comparisionin thread Compare 2 CSV files and create a new CSV file out of comparision
See perlintro or perldata for a description of hashes. "key" and "value" are terms used together with hashes.
If you search for join files or similar keywords, you'll find quite a bit of example code, for example join mutiple files on first column and join - join two files according to a common key.
Electric eels were invented at the same time as electricity
Before electricity was invented, electric eels had to stun with gas
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