How do I get the last occurrence of a word (or words) in a file?

[Anonymous Monk]

I have a list of servers with their status in a file. I need to get the last occurence of each of the servers in the file. The server names are VISHU, VISHU2, JITHU, JITHU2, MADHU, MADHU2
The file format is :
VISHU: server running 12/3/99
VISHU2: server down 12/3/99
VISHU :server running 3/12/00
JITHU : server down 3/12/00
JITHU2: server running 4/12/00
......

I need to find the last occurences of each of the servers.

Originally posted as a Categorized Question.

[merlyn]

By getting the "last" occurrance, I don't know if you want to know the line it's on (as a line number), or the contents of the line. So I'll do both:

while (<>) {
  if /^((VIS|JIT|MAD)HU2?):/) {
    $found{$1} = [$., $_];
  }
}
for (sort keys %found) {
  print "$_ => @{$found{$_}}\n";
}

season to taste.

[mslattery]

Or stated another way ... arn't hashes great?

  while (<>) {
    /^(.+)\:/ ;         # Capture Server Name
    $hash{$1} = $_ ;    # Create Hash Key if found
  } 

  foreach $server (sort keys %hash) {
    print "$hash{$server}\n" ;
  }

Just for another style!

Have fun,
mslattery