In unix, two files can be compared in a quick and dirty manner by using a 
foreach line ( ` cat file1` ) 
grep $line file2

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to look for the lines shared by the two. I have written a perl script to read each file into an array, and I would like to use the arrays to find what is common to the two files and then work with both what is and is not common. Other than using the grep module, what would be the best way to do this?
I found that there is an exists command for arrays, but it seems to require an index number, while I'm looking to search by array element. I've considered reading each file into a hash and then searching the hashes with exists commands, but I though there ought to be an easier way... Thanks all!

In reply to Comparing two file in Arrays by MrMadScience

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