Ah, you specified that words had to be removed, not tokens that could be part of a word. For the token 'bin' which should be removed:
- foobin
- binary
- bin1
If all of those should be deleted then you can change that pattern from:
my $pattern = '\b(?:' . join('|', @tokens) . ')\b';
To:
my $pattern = join('|', @tokens);
If you only want to match words that start with 'bin', and are followed only by non-alpha characters, then this:
my $pattern = '^(?:' . join('|', @tokens) . ')[^a-zA-Z]*$';
A revised copy that handles the deletion of tokens with a purely line based input:
#!/usr/local/bin/perl
use strict;
use warnings;
if (@ARGV != 3) {
print "Usage: $0 <pattern file> <input file> <output file>\n";
exit;
}
my ($pattern_filename, $source_filename, $dest_filename) = @ARGV;
open my $pattern_fh, '<', $pattern_filename or die "Failed to open $pa
+ttern_filename: $!";
my @tokens = ();
while (my $line = <$pattern_fh>) {
chomp $line;
push @tokens, $line;
}
my $pattern = '^(?:' . join('|', @tokens) . ')[^a-zA-Z]*$';
print "Search pattern: $pattern\n";
open my $infile, "<", $source_filename or die "Failed to open $source
+_filename: $!";
open my $outfile,">>", $dest_filename or die "Failed to open $dest_f
+ilename: $!";
while(my $line = <$infile>) {
print "input : $line";
if ($line =~ /$pattern/) {
next;
}
print "output: $line";
print $outfile $line;
}
close($infile);
close($outfile);
| 