Hm... why do you want to go high-tech, when low-tech will do it for you? Just read the username file in line by line and add the names to a hash. Why a hash? Because you can lookup hash entries for existance.

while (<FH>)
{
    next if (/^#/);
    chomp;
    if (not exists $usernames{$_})
    {
        $usernames{$_} = 1;
    }
    else
    {
        die "found username duplicate in first file, script halted!\n"
+;
    }
}

[download]

Now you can open the other file read it line by line (with or without array buffering it), parsing each line into it's words and then compare them with the usernames hash (exists $hash{$word}).

If no match came up, write the line to an output file. If you found a match go on searching until you find the next match, then start from the beginning (of this paragraph, not the file). :)

/oliver/

Hans: Not ze problem!

In reply to Re: Suggestions re parsing one large file with elements of another large file by neuroball
in thread Suggestions re parsing one large file with elements of another large file by billie_t

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