loncom/homework/grades.pm - diff

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Diff for /loncom/homework/grades.pm between versions 1.86 and 1.87

-version 1.86, 2003/04/21 18:39:43
+version 1.87, 2003/04/30 15:52:28
  Line 46  use Apache::lonhomework;
  use Apache::loncoursedata;
  use Apache::lonmsg qw(:user_normal_msg);
  use Apache::Constants qw(:common);
+ use String::Similarity;
+ my %oldessays=();
  # ----- These first few routines are general use routines.----
  #
- Line 221  sub jscriptNform {
+ Line 224  sub jscriptNform {
  }
  #------------------ End of general use routines --------------------
+ #
+ # Find most similar essay
+ #
+ sub most_similar {
+     my ($uname,$udom,$uessay)=@_;
+ # ignore spaces and punctuation
+     $uessay=~s/\W+/ /gs;
+ # these will be returned. Do not care if not at least 50 percent similar
+     my $limit=0.5;
+     my $sname='';
+     my $sdom='';
+     my $scrsid='';
+     my $sessay='';
+ # go through all essays ...
+     foreach my $tkey (keys %oldessays) {
+ 	my ($tname,$tdom,$tcrsid)=split(/\./,$tkey);
+ # ... except the same student
+         if (($tname ne $uname) && ($tdom ne $udom)) {
+ 	    my $tessay=$oldessays{$tkey};
+             $tessay=~s/\W+/ /gs;
+ # String similarity gives up if not even limit
+             my $tsimilar=&String::Similarity::similar($uessay,$tessay,$limit);
+ # Found one
+             if ($tsimilar>$limit) {
+ 		$limit=$tsimilar;
+                 $sname=$tname;
+                 $sdom=$sdom;
+                 $scrsid=$tcrsid;
+                 $sessay=$oldessays{$tkey};
+             }
+         }
+     }
+     if ($limit>0.5) {
+        return ($sname,$sdom,$scrsid,$sessay,$limit);
+     } else {
+        return ('','','','',0);
+     }
+ }
  #-------------------------------------------------------------------
  #------------------------------------ Receipt Verification Routines

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Removed from v.1.86
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	Added in v.1.87