I am not sure on performance, as I have not implemented something like this, but...

How about something like this....

...
my @junk = map {chomp $_; qr(\Q$_\E)} <JUNK>;
while (<>) {
    # Added / Modified
    my $line = $_;
    next if $line =~ $_ foreach (@junk);
    # End update
    print;
}

[download]

Order the junkfile in descending order of occurances.

Another option, to avoid the inner loop, would be to build a giant alternation regexp (qr((foo|bar|biz|bang))) from the junk file. However, then you need to escape various things. In addition, I am not sure which is faster, the alternation regexp or the nested loop.

--MidLifeXis

P.S. All code is untested, blah blah blah.

Update: Updated foreach stuff - Thanks BrowserUk. Added \Q..\E. Thanks Berik.

In reply to Re: file substitution by MidLifeXis
in thread file substitution by Anonymous Monk

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