Re: find common data in multiple files

If you do:

my %hash;

++$hash{ $_ } while <>;
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It will add and increment an entry in the hash for each line of every file named on the command line.

Then all you need to do is run through the hash and print out any key with a value equal to the number of files:

$hash{ $_ } == @ARGV and print for keys %hash;
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With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority". The enemy of (IT) success is complexity.

In the absence of evidence, opinion is indistinguishable from prejudice. Suck that fhit

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Re^2: find common data in multiple files by Laurent_R (Canon) on Dec 28, 2017 at 11:18 UTC
Yes, I was thinking about a similar solution. Short, easy, and efficient. Please note, however, that this will work properly only provided there are are no duplicate entries in the individual input files.	[reply]