in reply to How to concatenate the contents of two files?

If this is all you want to do with those files, you could just hand this off as a system command, like so: 
`more B.txt >> A.txt`

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See perlop if you're not familiar with "backtick" notation.

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Re^2: How to concatenate the contents of two files?
by Aristotle (Chancellor) on Sep 02, 2004 at 21:01 UTC

    Ugh, please don't use backticks simply to invoke a shell command.

    system 'cat B.txt >> A.txt';

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    Makeshifts last the longest.

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[d/l]

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