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Re^2: comparing file contents

by kumaar1986 (Initiate)
on Nov 23, 2011 at 01:27 UTC ( #939573=note: print w/replies, xml ) Need Help??

in reply to Re: comparing file contents
in thread comparing file contents

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"


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

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Re^3: comparing file contents
by Util (Priest) on Nov 23, 2011 at 01:59 UTC
    Yes, it could be achieved by opening the file in read+write mode, or by re-opening the file in write mode after its read-only filehandle was closed. However, either of these methods would require other code changes, to hold all the lines of output until after all the input had occurred. The simplest way is to append this code to the bottom of my previous code:
    unlink $in_path or die "Could not delete '$in_path': $!"; use File::Copy; move( $out_path, $in_path ) or die "Could not move file '$out_path' to '$in_path': $!";

      Final help with this program please. Instead of processing just the female1.txt how to process all the files in the directory and its sub directories and compare it with the ICD-codes-text file.

        I have used the use::File::Found to traverse the directory and its sub directories but i am getting the following error for this program . Cannot open 'folder-name': permission denied at at line 42 . Please anyone help me to resolve how to access all the files in the directory.

        #!/usr/bin/perl use strict; use warnings; use Data::Dumper; $Data::Dumper::Useqq = 1; use File::Find; find(\&wanted,'D:\coding\patientperclinic-withouthistory'); sub wanted { my $icd_path = 'D:\coding\icd-10-codes.txt'; my $in_path = <*>; my $out_path = 'D:\coding\female1_corrected.txt'; open my $icd_fh, '<', $icd_path or die "Cannot open '$icd_path': $!"; #print "Reading '$icd_path'\n"; my %lookup_icd; while ( my $line = <$icd_fh> ) { chomp $line; my ( $lookup_code, $icd_code_and_text ) = split /\t/, $line; # print Dumper $lookup_code, $icd_code_and_text; if ( exists $lookup_icd{$lookup_code} ) { warn "Replacing $lookup_code;" . " was '$lookup_icd{$lookup_code}'," . " now '$icd_code_and_text'\n"; } $lookup_icd{$lookup_code} = $icd_code_and_text; } close $icd_fh; #print Dumper \%lookup_icd; #print "Reading '$in_path'\n"; #print "Writing '$out_path'\n"; open my $in_fh, '<', $in_path or die "Cannot open '$in_path': $!"; open my $out_fh, '>', $out_path or die "Cannot open '$out_path': $!"; while ( my $line = <$in_fh> ) { chomp $line; my @cols = split / /, $line; for my $possible_icd (@cols) { my $replacement_icd = $lookup_icd{$possible_icd}; if ($replacement_icd) { $possible_icd = $replacement_icd; } } print {$out_fh} join( ' ', @cols ), "\n"; } close $in_fh; close $out_fh or warn "Cannot close 'out_path': $!\nSome data may not have been +written."; unlink $in_path or die "Could not delete '$in_path': $!"; use File::Copy; move( $out_path, $in_path ) or die "Could not move file '$out_path' to '$in_path': $!"; }

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