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Diff for /loncom/homework/hint.pm between versions 1.30 and 1.60

version 1.30, 2002/10/28 23:31:48 version 1.60, 2005/08/26 18:57:25
Line 7 Line 7
 #  #
 # This file is part of the LearningOnline Network with CAPA (LON-CAPA).  # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
 #  #
 # LON-CAPA is free software; you can redistribute it and/or modify  # LON-CAPA me&aree software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by  # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation; either version 2 of the License, or  # the Free Software Foundation; either version 2 of the License, or
 # (at your option) any later version.  # (at your option) any later version.
Line 31  package Apache::hinttags; Line 31  package Apache::hinttags;
 use strict;  use strict;
 use Apache::lonnet;  use Apache::lonnet;
 use capa;  use capa;
   use Apache::lonlocal;
   
 BEGIN {  BEGIN {
   &Apache::lonxml::register('Apache::hinttags',('hintgroup','hintpart','numericalhint','stringhint','formulahint','optionhint','radiobuttonhint'));      &Apache::lonxml::register('Apache::hinttags',('hintgroup','hintpart','numericalhint','stringhint','formulahint','optionhint','radiobuttonhint'));
 }  }
   
   
 @Apache::hint::which=();  @Apache::hint::which=();
 sub start_hintgroup {  sub start_hintgroup {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $skiptoend='0';      my $skiptoend='0';
   my $result;      my $result;
   
   if ($target eq 'web') {      if ($target eq 'web') {
     my $id=$Apache::inputtags::part;   my $id=$Apache::inputtags::part;
     my $numtries=$Apache::lonhomework::history{"resource.$id.tries"};   my $numtries=$Apache::lonhomework::history{"resource.$id.tries"};
     if ( $numtries eq '') { $numtries = 0; }   if ( $numtries eq '') { $numtries = 0; }
     my $hinttries=&Apache::lonnet::EXT("resource.$id.hinttries");   my $hinttries=&Apache::response::get_response_param($id,"hinttries",1);
     if ( $hinttries eq '') { $hinttries = 1; }   &Apache::lonxml::debug("found :$id:$numtries:$hinttries:");
     &Apache::lonxml::debug("found :$id:$numtries:$hinttries:");   my $gradestatus=
     if ( $numtries < $hinttries ) {      $Apache::lonhomework::history{"resource.$id.solved"};
       $skiptoend='1';   my $showoncorrect=lc(&Apache::lonxml::get_param('showoncorrect',$parstack,$safeeval));
     } else {   &Apache::lonxml::debug("onc orrect $showoncorrect, $gradestatus");
       if ($target eq 'web') {$result='<table bgcolor="#dddddd"><tr><td>';}   if ( ($showoncorrect ne 'yes' && &Apache::response::show_answer()) ||
     }       ( $numtries < $hinttries) ) {
     if ($skiptoend) {      &Apache::lonxml::debug("Grabbin all");
       &Apache::lonxml::get_all_text("/hintgroup",$$parser[$#$parser]);      &Apache::lonxml::get_all_text("/hintgroup",$parser);
    }
    &Apache::lonxml::startredirection;
       } elsif ($target eq 'tex') {
    $result .= '\keephidden{';
       } elsif ($target eq 'edit') {
    $result.=&Apache::edit::tag_start($target,$token);
    $result.=&Apache::edit::select_arg('Show hint even if problem Correct:','showoncorrect',[['no',&mt('No')],['yes',&mt('Yes')]],$token);
    $result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
       } elsif ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,'showoncorrect');
          if ($constructtag) {
              $result =&Apache::edit::rebuild_tag($token);
              $result.=&Apache::edit::handle_insert();
          }
     }      }
   } elsif ($target eq 'tex') {      @Apache::hint::which=();
     $result .= '\keephidden{';       return $result;
   }  
   @Apache::hint::which=();  
   return $result;  
 }  }
   
 sub end_hintgroup {  sub end_hintgroup {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $result;      my $result;
   
   if ($target eq 'web') {      if ($target eq 'web') {
     my $id=$Apache::inputtags::part;   my $id=$Apache::inputtags::part;
     my $numtries=$Apache::lonhomework::history{"resource.$id.tries"};   my $numtries=$Apache::lonhomework::history{"resource.$id.tries"};
     if ( $numtries eq '') { $numtries = 0; }   if ( $numtries eq '') { $numtries = 0; }
     my $hinttries=&Apache::lonnet::EXT("resource.$id.hinttries");   my $hinttries=&Apache::response::get_response_param($id,"hinttries",1);
     if ( $hinttries eq '') { $hinttries = 1; }   &Apache::lonxml::debug("found :$id:$numtries:$hinttries:");
     &Apache::lonxml::debug("found :$id:$numtries:$hinttries:");   my $hinttext=&Apache::lonxml::endredirection;
     if ( $numtries >= $hinttries ) {   if ($Apache::lonhomework::type ne 'exam' &&
       $result='</td></tr></table>';      $numtries >= $hinttries && $hinttext =~/\S/) {
       $result='<table bgcolor="#dddddd"><tr><td>'.
    $hinttext.'</td></tr></table>';
    }
       } elsif ($target eq 'edit') {
    $result.=&Apache::edit::end_table();
       } elsif ($target eq 'tex') {
    $result .= '}';
     }      }
   } elsif ($target eq 'edit') {      @Apache::hint::which=();
     $result.=&Apache::edit::end_table();      return $result;
   } elsif ($target eq 'tex') {  
     $result .= '}';   
   }  
   @Apache::hint::which=();  
   return $result;  
 }  }
   
 sub start_numericalhint {  sub start_numericalhint {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   #do everything in end, so intervening <responseparams> work      #do everything in end, so intervening <responseparams> work
   &Apache::response::start_hintresponse($parstack,$safeeval);      &Apache::response::start_hintresponse($parstack,$safeeval);
   my $result;      my $result;
   if ($target eq 'edit') {      if ($target eq 'edit') {
     $result.=&Apache::edit::tag_start($target,$token);   $result.=&Apache::edit::tag_start($target,$token);
     $result.=&Apache::edit::text_arg('Name:','name',$token);   $result.=&Apache::edit::text_arg('Name:','name',$token);
     $result.=&Apache::edit::text_arg('Answer:','answer',$token);   $result.=&Apache::edit::text_arg('Answer:','answer',$token);
     if ($token->[1] eq 'numericalhint') {   if ($token->[1] eq 'numericalhint') {
       $result.=&Apache::edit::text_arg('Unit:','unit',$token,5);      $result.=&Apache::edit::text_arg('Unit:','unit',$token,5).
       $result.=&Apache::edit::text_arg('Format:','format',$token,4);   &Apache::loncommon::help_open_topic('Physical_Units');
     } elsif ($token->[1] eq 'stringhint') {      $result.=&Apache::edit::text_arg('Format:','format',$token,4).
       $result.=&Apache::edit::select_arg('Type:','type',['cs','ci','mc'],$token);   &Apache::loncommon::help_open_topic('Numerical_Response_Format');
     } elsif ($token->[1] eq 'formulahint') {   } elsif ($token->[1] eq 'stringhint') {
       $result.=&Apache::edit::text_arg('Sample Points:','samples',$token,40);      $result.=&Apache::edit::select_arg('Type:','type',
     }      [['cs','Case Sensitive'],['ci','Case Insensitive'],
     $result.=&Apache::edit::end_row();       ['mc','Case Insensitive, Any Order']],$token);
     $result.=&Apache::edit::start_spanning_row();   } elsif ($token->[1] eq 'formulahint') {
   } elsif ($target eq 'modified') {      $result.=&Apache::edit::text_arg('Sample Points:','samples',$token,40);
     my $constructtag;   }
     if ($token->[1] eq 'numericalhint') {   $result.=&Apache::edit::end_row();
       $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,   $result.=&Apache::edit::start_spanning_row();
  'name','answer','unit','format');      } elsif ($target eq 'modified') {
     } elsif ($token->[1] eq 'stringhint') {   my $constructtag;
       $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,   if ($token->[1] eq 'numericalhint') {
  'name','answer','type');      $constructtag=&Apache::edit::get_new_args($token,$parstack,
     } elsif ($token->[1] eq 'formulahint') {       $safeeval,'name',
       $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,       'answer','unit','format');
  'name','answer','samples');   } elsif ($token->[1] eq 'stringhint') {
     }      $constructtag=&Apache::edit::get_new_args($token,$parstack,
     if ($constructtag) {       $safeeval,'name','answer',
       $result  = &Apache::edit::rebuild_tag($token);       'type');
       $result .= &Apache::edit::handle_insert();   } elsif ($token->[1] eq 'formulahint') {
       $constructtag=&Apache::edit::get_new_args($token,$parstack,
        $safeeval,'name','answer',
        'samples');
    }
    if ($constructtag) {
       $result  = &Apache::edit::rebuild_tag($token);
       $result .= &Apache::edit::handle_insert();
    }
       } elsif ($target eq 'web') {
    &Apache::response::reset_params();
     }      }
   }      return $result;
   return $result;  
 }  }
   
 sub end_numericalhint {  sub end_numericalhint {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $result;      my $result;
   if ($target eq 'web') {      if ($target eq 'web') {
     $safeeval->share_from('capa',['&caparesponse_capa_check_answer']);   if (!$Apache::lonxml::default_homework_loaded) {
     my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);      &Apache::lonxml::default_homework_load($safeeval);
     &Apache::response::setup_params('numericalhint');   }
     my $partid=$Apache::inputtags::part;   $safeeval->share_from('capa',['&caparesponse_capa_check_answer']);
     my $id=$Apache::inputtags::response['-1'];   my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
     #id submissions occured under   &Apache::response::setup_params('numericalhint',$safeeval);
     my $submitid=$Apache::inputtags::response['-2'];   my $partid=$Apache::inputtags::part;
     my $response = $Apache::lonhomework::history{   my $id=$Apache::inputtags::hint[-1];
    #id submissions occured under
    my $submitid=$Apache::inputtags::response[-1];
    my $response = $Apache::lonhomework::history{
     "resource.$partid.$submitid.submission"};      "resource.$partid.$submitid.submission"};
     &Apache::lonxml::debug("hintgroup is using $response<br />\n");   &Apache::lonxml::debug("hintgroup is using $response<br />\n");
     #build safe space expression   my $hideunit=&Apache::response::get_response_param($partid.'_'.$submitid,'turnoffunit');
     my $expression="&caparesponse_check_list('".$response."','".   my $args_ref= \%{$safeeval->varglob('LONCAPA::CAPAresponse_args')};
       $$parstack[$#$parstack];   $$args_ref{'response'}=$response;
     #need to get all possible parms   #need to get all possible parms
     foreach my $key (keys(%Apache::inputtags::params)) {   foreach my $arg ('type','tol','sig','ans_fmt','unit','calc',
       $expression.= ';my $'. #'   'samples') {
  $key.'="'.$Apache::inputtags::params{$key}.'"';      $$args_ref{$arg}=
    &Apache::lonxml::get_param($arg,$parstack,$safeeval);
    }
    foreach my $key (keys(%Apache::inputtags::params)) {
       $$args_ref{$key}=$Apache::inputtags::params{$key};
    }
    if (lc($hideunit) eq "yes") { delete($$args_ref{'unit'}); }
    if ($$tagstack[-1] eq 'formulahint') {
       $$args_ref{'type'}='fml';
    } elsif ($$tagstack[-1] eq 'numericalhint') {
       $$args_ref{'type'}='float';
    }
    my @answer=&Apache::lonxml::get_param_var('answer',$parstack,$safeeval);
    &Apache::lonxml::debug('answer is'.join(':',@answer));
    @{$safeeval->varglob('LONCAPA::CAPAresponse_answer')}=@answer;
   
    ($result,my @msgs) = &Apache::run::run("&caparesponse_check_list()",
    $safeeval);
    &Apache::lonxml::debug('msgs are'.join(':',@msgs));
    &Apache::lonxml::debug("result:$result:$Apache::lonxml::curdepth");
    my ($awards)=split(/:/,$result);
    my (@awards) = split(/,/,$awards);
    my ($ad, $msg) = &Apache::inputtags::finalizeawards(\@awards,\@msgs);
    if ($ad eq 'EXACT_ANS' || $ad eq 'APPROX_ANS') { push (@Apache::hint::which,$name); }
    $result='';
       } elsif ($target eq 'meta') {
    $result=&Apache::response::meta_package_write($token->[1]);
       } elsif ($target eq 'edit') {
    $result.='</td></tr>'.&Apache::edit::end_table;
     }      }
     $expression.="');";      &Apache::response::end_hintresponse();
     $result = &Apache::run::run($expression,$safeeval);      return $result;
     &Apache::lonxml::debug("$expression:result:$result:$Apache::lonxml::curdepth");  
     my ($awards) = split /:/ , $result;  
     my ($ad) = &Apache::inputtags::finalizeawards(split /,/ , $awards);  
     if ($ad eq 'EXACT_ANS' || $ad eq 'APPROX_ANS') { push (@Apache::hint::which,$name); }  
     $result='';  
   } elsif ($target eq 'meta') {  
     $result=&Apache::response::meta_package_write('numericalhint');  
   } elsif ($target eq 'edit') {  
     $result.='</td></tr>'.&Apache::edit::end_table;  
   }  
   &Apache::response::end_hintresponse();  
   return $result;  
 }  }
   
 sub start_stringhint {  sub start_formulahint {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      return &start_numericalhint(@_);
   my $result;  
   if ($target eq 'meta') {  
     $result=&Apache::response::meta_package_write('stringhint');  
   } else {  
     $result.=&start_numericalhint(@_);  
   }  
   return $result;  
 }  }
   
 sub end_stringhint {  sub end_formulahint {
   return end_numericalhint(@_);      return &end_numericalhint(@_);
 }  }
   
 sub start_formulahint {  sub start_stringhint {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $result;      #do everything in end, so intervening <responseparams> work
   if ($target eq 'meta') {      &Apache::response::start_hintresponse($parstack,$safeeval);
     $result=&Apache::response::meta_package_write('formulahint');      my $result;
   } else {      if ($target eq 'edit') {
     $result.=&start_numericalhint(@_);   $result.=&Apache::edit::tag_start($target,$token);
   }   $result.=&Apache::edit::text_arg('Name:','name',$token);
   return $result;   $result.=&Apache::edit::text_arg('Answer:','answer',$token);
    $result.=&Apache::edit::select_arg('Type:','type',
    [['cs','Case Sensitive'],['ci','Case Insensitive'],
     ['mc','Case Insensitive, Any Order'],
     ['re','Regular Expression']],$token);
    $result.=&Apache::edit::end_row();
    $result.=&Apache::edit::start_spanning_row();
       } elsif ($target eq 'modified') {
    my $constructtag;
    $constructtag=&Apache::edit::get_new_args($token,$parstack,
     $safeeval,'name','answer',
     'type');
    $result  = &Apache::edit::rebuild_tag($token);
    $result .= &Apache::edit::handle_insert();
       } elsif ($target eq 'web') {
    &Apache::response::reset_params();
       }
       return $result;
 }  }
   
 sub end_formulahint {  sub end_stringhint {
   return end_numericalhint(@_);      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
       my $result;
       if ($target eq 'web') {
    if (!$Apache::lonxml::default_homework_loaded) {
       &Apache::lonxml::default_homework_load($safeeval);
    }
    my $answer=&Apache::lonxml::get_param('answer',$parstack,$safeeval);
    $safeeval->share_from('capa',['&caparesponse_capa_check_answer']);
    my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
    &Apache::response::setup_params('stringhint',$safeeval);
    my $partid=$Apache::inputtags::part;
    my $id=$Apache::inputtags::hint[-1];
    #id submissions occured under
    my $submitid=$Apache::inputtags::response[-1];
    my $response = $Apache::lonhomework::history{
       "resource.$partid.$submitid.submission"};
    &Apache::lonxml::debug("hintgroup is using $response<br />\n");
    my $args_ref= \%{$safeeval->varglob('LONCAPA::CAPAresponse_args')};
    $$args_ref{'response'}=$response;
    my $type=$$args_ref{'type'}=&Apache::lonxml::get_param('type',$parstack,$safeeval);
    my ($ad,$msg);
    if ($type eq 're' ) {
       ${$safeeval->varglob('LONCAPA::response')}=$response;
       my $compare='=';
       if ($answer=~/^\s*NOT\s*/) {
    $answer=~s/^\s*NOT\s*//;
    $compare='!';
       }
       my $test='$LONCAPA::response'.$compare.'~m'.$answer;
       &Apache::lonxml::debug("test $test");
       $result = &Apache::run::run("return $test",$safeeval);
       &Apache::lonxml::debug("current $response");
       &Apache::lonxml::debug("current $answer");
       $ad = ($result) ? 'APPROX_ANS' : 'INCORRECT';
    } else { 
       foreach my $key (keys(%Apache::inputtags::params)) {
    $$args_ref{$key}=$Apache::inputtags::params{$key};
       }
       &Apache::lonxml::debug('answer is'.$answer);
       @{$safeeval->varglob('LONCAPA::CAPAresponse_answer')}=($answer);
       
       ($result,my @msgs)=&Apache::run::run("&caparesponse_check_list()",
      $safeeval);
       &Apache::lonxml::debug('msgs are'.join(':',@msgs));
       &Apache::lonxml::debug("result:$result:$Apache::lonxml::curdepth");
       my ($awards)=split(/:/,$result);
       my (@awards) = split(/,/,$awards);
       ($ad, $msg) = &Apache::inputtags::finalizeawards(\@awards,\@msgs);
    }
    if ($ad eq 'EXACT_ANS' || $ad eq 'APPROX_ANS') { 
       push (@Apache::hint::which,$name);
    }
    $result='';
       } elsif ($target eq 'meta') {
    $result=&Apache::response::meta_package_write($token->[1]);
       } elsif ($target eq 'edit') {
    $result.='</td></tr>'.&Apache::edit::end_table;
       }
       &Apache::response::end_hintresponse();
       return $result;
 }  }
   
 # a part shows if it is on, if no specific parts are on, then default shows  # a part shows if it is on, if no specific parts are on, then default shows
 sub start_hintpart {  sub start_hintpart {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   
   my $show ='0';      my $show ='0';
   my $result = '';      my $result = '';
   if ($target eq 'web') {      if ($target eq 'web') {
     my $on= &Apache::lonxml::get_param('on',$parstack,$safeeval);   my $on= &Apache::lonxml::get_param('on',$parstack,$safeeval);
     &Apache::lonxml::debug("hintpart sees $on and ,$#Apache::hint::which");   &Apache::lonxml::debug("hintpart sees $on and ,$#Apache::hint::which");
     if ( $on eq 'default' && $#Apache::hint::which == '-1') {   if ( $on eq 'default' && $#Apache::hint::which == '-1') {
       $show=1;      $show=1;
     } else {   } else {
       my $which;      my $which;
       foreach $which (@Apache::hint::which) { if ($which eq $on) { $show = 1; last } }      foreach $which (@Apache::hint::which) { if ($which eq $on) { $show = 1; last } }
     }   }
     if (!$show) {   if (!$show) {
       &Apache::lonxml::get_all_text("/hintpart",$$parser[$#$parser]);      &Apache::lonxml::get_all_text("/hintpart",$parser);
     }   }
   } elsif ($target eq 'grade') {      } elsif ($target eq 'grade') {
     &Apache::lonxml::get_all_text("/hintpart",$$parser[$#$parser]);   &Apache::lonxml::get_all_text("/hintpart",$parser);
   } elsif ($target eq 'edit') {      } elsif ($target eq 'edit') {
     $result.= &Apache::edit::tag_start($target,$token);   $result.= &Apache::edit::tag_start($target,$token);
     $result.= &Apache::edit::text_arg('On:','on',$token);   $result.= &Apache::edit::text_arg('On:','on',$token);
     $result.= &Apache::edit::end_row();   $result.= &Apache::edit::end_row();
     $result.= &Apache::edit::start_spanning_row();   $result.= &Apache::edit::start_spanning_row();
   } elsif ($target eq 'modified') {      } elsif ($target eq 'modified') {
     my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,   my $constructtag=&Apache::edit::get_new_args($token,$parstack,
  'on');       $safeeval,'on');
     if ($constructtag) {   if ($constructtag) {
       $result = &Apache::edit::rebuild_tag($token);      $result = &Apache::edit::rebuild_tag($token);
       $result.=&Apache::edit::handle_insert();      $result.=&Apache::edit::handle_insert();
    }
     }      }
   }      return $result;
   return $result;  
 }  }
   
 sub end_hintpart {  sub end_hintpart {
Line 269  sub end_optionhint { Line 380  sub end_optionhint {
  my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);   my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
  my $partid=$Apache::inputtags::part;   my $partid=$Apache::inputtags::part;
  #id submissions occured under   #id submissions occured under
  my $submitid=$Apache::inputtags::response['-2'];   my $submitid=$Apache::inputtags::response[-1];
  my $part_id="$partid.$submitid";   my $part_id="$partid.$submitid";
  my %answer;   my %answer;
  my $answer=&Apache::lonxml::get_param('answer',$parstack,$safeeval);   my $answer=&Apache::lonxml::get_param('answer',$parstack,$safeeval);
Line 338  sub start_radiobuttonhint { Line 449  sub start_radiobuttonhint {
     return $result;      return $result;
 }  }
   
 sp;&end_radiobuttonhint {  sub end_radiobuttonhint {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result;      my $result;
     if ($target eq 'web') {      if ($target eq 'web') {
Line 348  sp;&end_radiobuttonhint { Line 459  sp;&end_radiobuttonhint {
  eval('@answer ='.$answer);   eval('@answer ='.$answer);
  my $partid=$Apache::inputtags::part;   my $partid=$Apache::inputtags::part;
  #id submissions occured under   #id submissions occured under
  my $submitid=$Apache::inputtags::response['-2'];   my $submitid=$Apache::inputtags::response[-1];
  my $part_id="$partid.$submitid";   my $part_id="$partid.$submitid";
  my $response = $Apache::lonhomework::history{   my $response = $Apache::lonhomework::history{
     "resource.$part_id.submission"};      "resource.$part_id.submission"};
  ($response)=&Apache::lonnet::str2hash($response);   ($response)=&Apache::lonnet::str2hash($response);
  if ($answer[0] eq 'foil' && $response eq $answer[1]) {   &Apache::lonxml::debug("response is $response");
     push (@Apache::hint::which,$name);  
    if ($answer[0] eq 'foil') {
       shift(@answer);
       foreach my $answer (@answer) {
    if ($response eq $answer) {
       push (@Apache::hint::which,$name);
       last;
    }
       }
  } elsif ($answer[0] eq 'concept') {   } elsif ($answer[0] eq 'concept') {
     if (ref($Apache::hint::radiobutton{"$part_id.concept.".$answer[1]})) {      shift(@answer);
  my @names=@{ $Apache::hint::radiobutton{"$part_id.concept.".$answer[1]} };      foreach my $answer (@answer) {
  if (grep(/^\Q$response\E$/,@names)) {   if (ref($Apache::hint::radiobutton{"$part_id.concept.".$answer})) {
     push(@Apache::hint::which,$name);      my @names=@{ $Apache::hint::radiobutton{"$part_id.concept.".$answer} };
       if (grep(/^\Q$response\E$/,@names)) {
    push(@Apache::hint::which,$name);
    last;
       }
  }   }
     }      }
  }   }
Removed from v.1.30  
changed lines
  Added in v.1.60

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