This looks confused. print IN $anything_at_all will write to the IN file. Are you trying to overwrite the data in 'female1.txt'? Luckily, Perl will not let you, because you opened the file as read-only. Your original description says "...should be replaced with ICD-code files corresponding...", but you are not outputting the entire line. Is the '>>' a debugging marker, or does it indicate that you are trying to append to a file? Going by your original description, I think you need:

I need to overwrite the result in 'female1.txt' instead of writing in a new output file

.

can that be achieved by changing the 'female1.txt' in to read and write mode

print {$out_fh} join( ' ', @cols ), "\n"

to

print {$in_path} join( ' ', @cols ), "\n"

Let me know if there is any other way to do this. thanks for your help in advance. your explanations are really good. I appreciate your time and effort for helping

In reply to Re^2: comparing file contents by kumaar1986
in thread comparing file contents by kumaar1986

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