On 21/08/2011 13:21, Rob Dixon wrote:
Hey Ronald
Here is a program like yours, that reads the entire file into memory and
then outputs the altered version.
#!/usr/bin/perl
use strict;
use warnings;
#program finds the first occurrence of the word Dood and
#replaces it with the word Dude in the file data.txt.
open my $fp, "<", "data.txt" or die "Cant open data.txt for input: $!";
my @buffer =<$fp>;
open my $fp, ">", "data.txt" or die "Cant open data.txt for output: $!";
my $replaced;
foreach my $line (@buffer) {
unless ($replaced) {
$replaced++ if $line =~ s/Dood/Dude/;
}
}
__END__
I'm sorry - that wasn't the version I tested! Here is the correct
working program. The second program I posted works fine.
Rob
#!/usr/bin/perl
use strict;
use warnings;
#program finds the first occurrence of the word Dood and
#replaces it with the word Dude in the file data.txt.
my $fp;
open $fp, "<", "data.txt" or die "Cant open data.txt for input: $!";
my @buffer = <$fp>;
open $fp, ">", "data.txt" or die "Cant open data.txt for output: $!";
my $replaced;
foreach my $line (@buffer) {
if (not $replaced) {
$replaced++ if $line =~ s/Dood/Dude/;
}
print $fp $line;
}
__END__
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