Re^2: Searching text files

you can get a <...> grep.exe for windows as well...

Why bother, when windows has a native tool that serves a similar purpose:

my $result = `findstr $phone_num file1 file2 file3`;
if ( $result ) {
  print "DO NOT CALL $phone_num\n";
}
else {
  print "You can annoy $phone_num with your gratuitous cold calling\n"
+;
}
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Re^3: Searching text files by davido (Cardinal) on Sep 14, 2006 at 19:11 UTC
grep and findstr are both O(n) linear searches. Maybe I'm missing something here, but I think that's what the OP is trying to avoid; a linear search that takes O(n) time to fail. Dave	[reply]
Re^4: Searching text files by aquarium (Curate) on Sep 16, 2006 at 14:05 UTC
forget O(n) etc. the original poster was slurping the whole files into memory, which was the cause of the slowness. grep will match the number in the 3 files (several megs total) in about a second....which surely meets the criteria for response time. the poster is a beginner, so would be best for them to have a one liner with a 1 second response time..rather than complicated code with at best 0.5 second response time. the hardest line to type correctly is: stty erase ^H	[reply]
Re^4: Searching text files by Not_a_Number (Prior) on Sep 14, 2006 at 19:27 UTC
grep and findstr are both O(n) linear searches... Err, yes. But could you explain why you posted this as a reply to my node, which is explicitly tagged as a reply to aquarium rather than a solution to the OP's problem?	[reply]