PERL Programming - simple text file i/o question

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simple text file i/o question

neminem

2006-08-16, 6:27 pm

So I have a large text-file with a bunch of data in it, and I will be wanting to run looped code that will, a bunch of times, go through this file, find the right line and change part of it. I won't know what the right line is at a given iteration until I'm there, so I can't batch-edit the file.

I'm still relatively new at perl, so what I want to know is: is there some easy way to tell perl, look through an input source, don't change anything until you match this regexp, and then rewrite only that line, keeping everything else the same? I'm sure there is, it just isn't coming to me.

Thanks in advance!

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