Thanks you for the brief guide. As I handle with 2 input files, and thus want to saved the output to another file. Could you guide me how to modify your existing script for my requirement?

At the same time, could you explain what is this part of code meant? "(my $line2 = <$in2>) or last" ??

In reply to Re^2: Solve the large file size issue by Anonymous Monk
in thread Solve the large file size issue by Vkhaw

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