Re: Comparison Of Files

well this is untested code, but maybe something like this:

compare_sites("newsite1.txt", "newsite2.txt")
  if day eq "monday..." # psuedo code

compare_sites("newsite2.txt", "newsite1.txt")
  if day eq "tuesday..." # psuedo code

sub compare_sites {
  my $file1 = shift;
  my $file2 = shift;

  open IN1, $file1;

  while(<IN1>) {
    chomp;
    $newsite1{$_}++;
  } # while

  close IN1;

  open IN2, $file2;

  while(<IN2>) {
    chomp;
    print "$_ is a new site\n" 
      if not defined($newsite1{$_});
  } # while

  close IN2;
} # compare_sites
[download]

Hopefully memory isn't a problem... but otherwise this shouldn't be too bad a solutions

UPDATE:

changed the code to a function as per tye's suggestion (and so he doesn't think I'm trying to make him look like an idiot I added this comment)... and added psuedo code for calling the function based on dates... :P

UPDATE:

changed the does not exist line to print the site name and not a number... plus it identifies that it is a new site...

Comment on Re: Comparison Of Files Download Code

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Re: Re: Comparison Of Files by runrig (Abbot) on Dec 05, 2000 at 22:47 UTC
One thing. I would change this: `while(<IN2>) { chomp; print "$_ is a new site\n" if not defined($newsite1{$_}); } # while` [download] to this: `while(<IN2>) { chomp; print "$_ is a new site\n" unless exists $newsite1{$_}; } # while` [download] Checking for the existence of a key is quicker than looking up the value of a hash element.	[reply] [d/l] [select]
Re: Re: Comparison Of Files by Albannach (Monsignor) on Dec 05, 2000 at 21:06 UTC
How about something like this to choose the order of files: `if( -M 'newsite1.txt' > -M 'newsite2.txt' ) { compare_sites('newsite1.txt', 'newsite2.txt') } else { compare_sites('newsite2.txt', 'newsite1.txt') }` [download] That way if for some reason the update doesn't run one day, you'll still be comparing the files in proper order. -- I'd like to be able to assign to an luser	[reply] [d/l]
Re: Re: Comparison Of Files by ImpalaSS (Monk) on Dec 05, 2000 at 20:23 UTC
Hey, i would use that kind of solution, but each file gets updates on alternating days. So on one day, newsite1.txt might be the newest file, and the other newsite2.txt might. I need a way to just see, if one name is in the other, and if its not.. print it, so if newsite2.txt has a site that newsite1.txt does not, print it, and viceversa. Thanks Dipul	[reply]
(tye)Re: Comparison Of Files by tye (Sage) on Dec 05, 2000 at 20:25 UTC
Then make it into a subroutine and reverse the arguments to it (the names of the files) depending on the day. - tye (but my friends call me "Tye")	[reply]