[$j] =~ /[\000-\037]/) {
+ $response->[$j] =~ s/[\000-\037]//g;
+ $control_chars_removed = 1;
+ }
+ }
+ }
+ my ($award,$msg) = &caparesponse_check($answer->[$j],
+ $response->[$j]);
+ if ($type eq 'cs' || $type eq 'ci') {
+ $error = &verify_stringresponse($type,$award,$response->[$j],
+ $answer->[$j]);
+ }
+ push(@awards,$award);
+ push(@msgs, $msg);
+ }
+ ($award,$msg) =
+ &LONCAPA_INTERNAL_FINALIZEAWARDS(\@awards,\@msgs);
+ }
+ $memoized{$key} = [$award,$msg];
+ }
+ }
+ }
+
+ my ($final_award,$final_msg);
+ &init_permutation(scalar(@$responses),
+ $LONCAPA::CAPAresponse_answer->{'type'});
+
+ # possible FIXMEs
+ # - significant time is spent calling non-safe space routine
+ # from safe space
+ # - early outs could be possible with classifying awards is to stratas
+ # and stopping as so as hitting the top strata
+ # - some early outs also might be possible with check ing the
+ # memoized hash of results (is correct even possible? etc.)
+
+ my (@final_awards,@final_msg);
+ while( &get_permutations_left() ) {
+ my $order = &get_next_permutation();
+ my (@awards, @msgs, $i);
+ foreach my $thisanswer (@{ $LONCAPA::CAPAresponse_answer->{'answers'} }) {
+ my $key = "$thisanswer\0".$responses->[$order->[$i]];
+ push(@awards,$memoized{$key}[0]);
+ push(@msgs,$memoized{$key}[1]);
+ $i++;
+
+ }
+ &LONCAPA_INTERNAL_DEBUG(" all awards ".join(':',@awards));
+
+ my ($possible_award,$possible_msg) =
+ &LONCAPA_INTERNAL_FINALIZEAWARDS(\@awards,\@msgs);
+ &LONCAPA_INTERNAL_DEBUG(" pos awards ".$possible_award);
+ push(@final_awards,$possible_award);
+ push(@final_msg,$possible_msg);
+ }
+
+ &LONCAPA_INTERNAL_DEBUG(" all final_awards ".join(':',@final_awards));
+ my ($final_award,$final_msg) =
+ &LONCAPA_INTERNAL_FINALIZEAWARDS(\@final_awards,\@final_msg,undef,1);
+ return ($final_award,$final_msg,$error,$control_chars_removed,$ansstring);
+}
+
+sub verify_stringresponse {
+ my ($type,$award,$resp,$ans) = @_;
+ return if ($award eq 'EXACT_ANS');
+ my $error;
+ if ($resp =~ /^\s|\s$/) {
+ $resp =~ s{^\s+|\s+$}{}g;
+ }
+ if ($ans =~ /^\s|\s$/) {
+ $ans =~ s{^\s+|\s+$}{}g;
+ }
+ if ($type eq 'ci') {
+ $resp = lc($resp);
+ $ans = lc($ans);
+ }
+ if ($resp eq $ans) {
+ if ($award eq 'INCORRECT') {
+ $error = 'MISGRADED';
+ }
+ }
+ return $error;
+}
+
+sub cas {
+ my ($system,$input,$library)=@_;
+ my $output;
+ my $dump;
+ if ($system eq 'maxima') {
+ $output=&maxima_eval($input,$library);
+ } elsif ($system eq 'R') {
+ ($output,$dump)=&r_eval($input,$library,0);
+ } else {
+ $output='Error: unrecognized CAS';
+ }
+ return $output;
+}
+
+sub cas_hashref {
+ my ($system,$input,$library)=@_;
+ if ($system eq 'maxima') {
+ return 'Error: unsupported CAS';
+ } elsif ($system eq 'R') {
+ return &r_eval($input,$library,1);
+ } else {
+ return 'Error: unrecognized CAS';
+ }
+}
+
+#
+# cas_hashref_entry takes a list of indices and gets the entry in a hash generated by Rreturn.
+# Call: cas_hashref_entry(Rvalue, index1, index2, ...) where Rvalue is a hash returned by Rreturn.
+# Rentry will return the first scalar value it encounters (ignoring excess indices).
+# If an invalid key is given, it returns undef.
+#
+sub cas_hashref_entry {
+ return &Rentry(@_);
+}
+
+#
+# cas_hashref_array takes a list of indices and gets a column array from a hash generated by Rreturn.
+# Call: cas_hashref_array(Rvalue, index1, index2, ...) where Rvalue is a hash returned by Rreturn.
+# If an invalid key is given, it returns undef.
+#
+sub cas_hashref_array {
+ return &Rarray(@_);
}
sub tex {
- if ( $external::target eq "tex" ) {
- return @_[0];
- } else {
- return @_[1];
- }
+ if ( $external::target eq "tex" ) {
+ return $_[0];
+ } else {
+ return $_[1];
+ }
}
sub var_in_tex {
- if ( $external::target eq "tex" ) {
- return @_[0];
- } else {
- return "";
- }
+ if ( $external::target eq "tex" ) {
+ return $_[0];
+ } else {
+ return "";
+ }
}
sub web {
- if ( $external::target eq "tex" ) {
- return @_[1];
- } else {
- if ( $external::target eq "web" || $external::target eq "answer") {
- return @_[2];
+ if ( $external::target eq "tex" ) {
+ return $_[1];
} else {
- return @_[0];
+ if ( $external::target eq "web" || $external::target eq "answer") {
+ return $_[2];
+ } else {
+ return $_[0];
+ }
}
- }
}
sub html {
- if ( $external::target eq "web" ) {
- return shift;
- }
-}
-
-sub problem {
- return '1';
+ if ( $external::target eq "web" ) {
+ return shift;
+ }
}
sub hinton {
- return 0;
+ return 0;
}
sub random {
- my ($start,$end,$step)=@_;
- if ( ! $hidden::RANDOMINIT ) {
- srand($external::randomseed);
- $hidden::RANDOMINIT=1;
- }
- my $num=1+int(($end-$start)/$step);
- my $result=$start + int(rand() * $num)*$step;
- return $result;
+ my ($start,$end,$step)=@_;
+ if ( ! $hidden::RANDOMINIT ) {
+ if ($external::randomseed == 0) { $external::randomseed=1; }
+ if ($external::randomseed =~/,/) {
+ my ($num1,$num2)=split(/,/,$external::randomseed);
+ &random_set_seed(1,abs($num1));
+ } elsif ($external::randomseed =~/:/) {
+ my ($num1,$num2)=split(/:/,$external::randomseed);
+ &random_set_seed(abs($num1),abs($num2));
+ } else {
+ &random_set_seed(1,int(abs($external::randomseed)));
+ }
+ &math_random_uniform();
+ $hidden::RANDOMINIT=1;
+ }
+ if (!defined($step)) { $step=1; }
+ my $num=1+int(($end-$start)/$step);
+ my $result=$start + int(&math_random_uniform() * $num)*$step;
+ return $result;
}
sub random_normal {
- my ($item_cnt,$seed,$av,$std_dev) = @_;
- my @retArray;
- &random_set_seed_from_phrase($seed);
- @retArray=&math_random_normal($item_cnt,$av,$std_dev);
- return @retArray;
+ my ($item_cnt,$seed,$av,$std_dev) = @_;
+ my @oldseed=&random_get_seed();
+ my @retArray;
+ &random_set_seed_from_phrase($seed);
+ @retArray=&math_random_normal($item_cnt,$av,$std_dev);
+ &random_set_seed(@oldseed);
+ return @retArray;
}
sub random_beta {
- my ($item_cnt,$seed,$aa,$bb) = @_;
- my @retArray;
- &random_set_seed_from_phrase($seed);
- @retArray=&math_random_beta($item_cnt,$aa,$bb);
- return @retArray;
+ my ($item_cnt,$seed,$aa,$bb) = @_;
+ my @oldseed=&random_get_seed();
+ my @retArray;
+ &random_set_seed_from_phrase($seed);
+ @retArray=&math_random_beta($item_cnt,$aa,$bb);
+ &random_set_seed(@oldseed);
+ return @retArray;
}
sub random_gamma {
- my ($item_cnt,$seed,$a,$r) = @_;
- my @retArray;
- &random_set_seed_from_phrase($seed);
- @retArray=&math_random_gamma($item_cnt,$a,$r);
- return @retArray;
+ my ($item_cnt,$seed,$a,$r) = @_;
+ my @oldseed=&random_get_seed();
+ my @retArray;
+ &random_set_seed_from_phrase($seed);
+ @retArray=&math_random_gamma($item_cnt,$a,$r);
+ &random_set_seed(@oldseed);
+ return @retArray;
}
sub random_exponential {
- my ($item_cnt,$seed,$av) = @_;
- my @retArray;
- &random_set_seed_from_phrase($seed);
- @retArray=&math_random_exponential($item_cnt,$av);
- return @retArray;
+ my ($item_cnt,$seed,$av) = @_;
+ my @oldseed=&random_get_seed();
+ my @retArray;
+ &random_set_seed_from_phrase($seed);
+ @retArray=&math_random_exponential($item_cnt,$av);
+ &random_set_seed(@oldseed);
+ return @retArray;
}
sub random_poisson {
- my ($item_cnt,$seed,$mu) = @_;
- my @retArray;
- &random_set_seed_from_phrase($seed);
- @retArray=&math_random_poisson($item_cnt,$mu);
- return @retArray;
+ my ($item_cnt,$seed,$mu) = @_;
+ my @oldseed=&random_get_seed();
+ my @retArray;
+ &random_set_seed_from_phrase($seed);
+ @retArray=&math_random_poisson($item_cnt,$mu);
+ &random_set_seed(@oldseed);
+ return @retArray;
}
sub random_chi {
- my ($item_cnt,$seed,$df) = @_;
- my @retArray;
- &random_set_seed_from_phrase($seed);
- @retArray=&math_random_chi_square($item_cnt,$df);
- return @retArray;
+ my ($item_cnt,$seed,$df) = @_;
+ my @oldseed=&random_get_seed();
+ my @retArray;
+ &random_set_seed_from_phrase($seed);
+ @retArray=&math_random_chi_square($item_cnt,$df);
+ &random_set_seed(@oldseed);
+ return @retArray;
}
sub random_noncentral_chi {
- my ($item_cnt,$seed,$df,$nonc) = @_;
- my @retArray;
- &random_set_seed_from_phrase($seed);
- @retArray=&math_random_noncentral_chi_square($item_cnt,$df,$nonc);
- return @retArray;
+ my ($item_cnt,$seed,$df,$nonc) = @_;
+ my @oldseed=&random_get_seed();
+ my @retArray;
+ &random_set_seed_from_phrase($seed);
+ @retArray=&math_random_noncentral_chi_square($item_cnt,$df,$nonc);
+ &random_set_seed(@oldseed);
+ return @retArray;
}
sub random_f {
- my ($item_cnt,$seed,$dfn,$dfd) = @_;
- my @retArray;
- &random_set_seed_from_phrase($seed);
- @retArray=&math_random_f($item_cnt,$dfn,$dfd);
- return @retArray;
+ my ($item_cnt,$seed,$dfn,$dfd) = @_;
+ my @oldseed=&random_get_seed();
+ my @retArray;
+ &random_set_seed_from_phrase($seed);
+ @retArray=&math_random_f($item_cnt,$dfn,$dfd);
+ &random_set_seed(@oldseed);
+ return @retArray;
}
sub random_noncentral_f {
- my ($item_cnt,$seed,$dfn,$dfd,$nonc) = @_;
- my @retArray;
- &random_set_seed_from_phrase($seed);
- @retArray=&math_random_noncentral_f($item_cnt,$dfn,$dfd,$nonc);
- return @retArray;
+ my ($item_cnt,$seed,$dfn,$dfd,$nonc) = @_;
+ my @oldseed=&random_get_seed();
+ my @retArray;
+ &random_set_seed_from_phrase($seed);
+ @retArray=&math_random_noncentral_f($item_cnt,$dfn,$dfd,$nonc);
+ &random_set_seed(@oldseed);
+ return @retArray;
}
sub random_multivariate_normal {
- my ($item_cnt,$seed,$mean,$covar) = @_;
- &random_set_seed_from_phrase($seed);
- @retArray=&math_random_multivariate_normal($item_cnt,@$mean,@$covar);
- return @retArray;
+ my ($item_cnt,$seed,$mean,$covar) = @_;
+ my @oldseed=&random_get_seed();
+ &random_set_seed_from_phrase($seed);
+ my @retArray=&math_random_multivariate_normal($item_cnt,@$mean,@$covar);
+ &random_set_seed(@oldseed);
+ return @retArray;
}
sub random_multinomial {
- my ($item_cnt,$seed,@p) = @_;
- my @retArray;
- &random_set_seed_from_phrase($seed);
- @retArray=&math_random_multinomial($item_cnt,@p);
- return @retArray;
+ my ($item_cnt,$seed,@p) = @_;
+ my @oldseed=&random_get_seed();
+ my @retArray;
+ &random_set_seed_from_phrase($seed);
+ my @retArray=&math_random_multinomial($item_cnt,@p);
+ &random_set_seed(@oldseed);
+ return @retArray;
}
sub random_permutation {
- my ($seed,@inArray) = @_;
- my @retArray;
- &random_set_seed_from_phrase($seed);
- @retArray=&math_random_permutation(@inArray);
- return @retArray;
+ my ($seed,@inArray) = @_;
+ my @oldseed=&random_get_seed();
+ my @retArray;
+ &random_set_seed_from_phrase($seed);
+ @retArray=&math_random_permutation(@inArray);
+ &random_set_seed(@oldseed);
+ return @retArray;
}
sub random_uniform {
- my ($item_cnt,$seed,$low,$high) = @_;
- my @retArray;
- &random_set_seed_from_phrase($seed);
- @retArray=&math_random_uniform($item_cnt,$low,$high);
- return @retArray;
+ my ($item_cnt,$seed,$low,$high) = @_;
+ my @oldseed=&random_get_seed();
+ my @retArray;
+ &random_set_seed_from_phrase($seed);
+ @retArray=&math_random_uniform($item_cnt,$low,$high);
+ &random_set_seed(@oldseed);
+ return @retArray;
}
sub random_uniform_integer {
- my ($item_cnt,$seed,$low,$high) = @_;
- my @retArray;
- &random_set_seed_from_phrase($seed);
- @retArray=&math_random_uniform_integer($item_cnt,$low,$high);
- return @retArray;
+ my ($item_cnt,$seed,$low,$high) = @_;
+ my @oldseed=&random_get_seed();
+ my @retArray;
+ &random_set_seed_from_phrase($seed);
+ @retArray=&math_random_uniform_integer($item_cnt,$low,$high);
+ &random_set_seed(@oldseed);
+ return @retArray;
}
sub random_binomial {
- my ($item_cnt,$seed,$nt,$p) = @_;
- my @retArray;
- &random_set_seed_from_phrase($seed);
- @retArray=&math_random_binomial($item_cnt,$nt,$p);
- return @retArray;
+ my ($item_cnt,$seed,$nt,$p) = @_;
+ my @oldseed=&random_get_seed();
+ my @retArray;
+ &random_set_seed_from_phrase($seed);
+ @retArray=&math_random_binomial($item_cnt,$nt,$p);
+ &random_set_seed(@oldseed);
+ return @retArray;
}
sub random_negative_binomial {
- my ($item_cnt,$seed,$ne,$p) = @_;
- my @retArray;
- &random_set_seed_from_phrase($seed);
- @retArray=&math_random_negative_binomial($item_cnt,$ne,$p);
- return @retArray;
-}
-
-sub abs { abs(shift) }
-sub sin { sin(shift) }
-sub cos { cos(shift) }
-sub exp { exp(shift) }
-sub int { int(shift) }
-sub log { log(shift) }
-sub atan2 { atan2($_[0],$_[1]) }
-sub sqrt { sqrt(shift) }
+ my ($item_cnt,$seed,$ne,$p) = @_;
+ my @oldseed=&random_get_seed();
+ my @retArray;
+ &random_set_seed_from_phrase($seed);
+ @retArray=&math_random_negative_binomial($item_cnt,$ne,$p);
+ &random_set_seed(@oldseed);
+ return @retArray;
+}
+
+sub abs { CORE::abs(shift) }
+sub sin { CORE::sin(shift) }
+sub cos { CORE::cos(shift) }
+sub exp { CORE::exp(shift) }
+sub int { CORE::int(shift) }
+sub log { CORE::log(shift) }
+sub atan2 { CORE::atan2($_[0],$_[1]) }
+sub sqrt { CORE::sqrt(shift) }
-sub tan { sin($_[0]) / cos($_[0]) }
+sub tan { CORE::sin($_[0]) / CORE::cos($_[0]) }
#sub atan { atan2($_[0], 1); }
#sub acos { atan2(sqrt(1 - $_[0] * $_[0]), $_[0] ); }
#sub asin { atan2($_[0], sqrt(1- $_[0] * $_[0]) ); }
-sub log10 { log($_[0])/log(10); }
+sub log10 { CORE::log($_[0])/CORE::log(10); }
sub factorial {
- my $input = int(shift);
+ my $input = CORE::int(shift);
return "Error - unable to take factorial of an negative number ($input)" if $input < 0;
return "Error - factorial result is greater than system limit ($input)" if $input > 170;
return 1 if $input == 0;
@@ -428,17 +852,193 @@ sub sub_string {
}
sub pow {return $_[0] ** $_[1]; }
-sub ceil {return (($_[0]-int($_[0]))== 0.0) ? $_[0] : (($_[0] > 0) ? (int($_[0])+ 1) : int($_[0])); }
-sub floor {return (($_[0]-int($_[0]))== 0.0) ? $_[0] : (($_[0] > 0) ? int($_[0]) : (int($_[0])-1)); }
+sub ceil {return (($_[0]-CORE::int($_[0]))== 0.0) ? $_[0] : (($_[0] > 0) ? (CORE::int($_[0])+ 1) : CORE::int($_[0])); }
+sub floor {return (($_[0]-CORE::int($_[0]))== 0.0) ? $_[0] : (($_[0] > 0) ? CORE::int($_[0]) : (CORE::int($_[0])-1)); }
#sub floor {return int($_[0]); }
sub format {
- my ($value,$fmt)=@_;
- return sprintf('%.'.$fmt,$value);
+ my ($value,$fmt)=@_;
+ my ($dollarmode,$commamode,$alwaysperiod,$options);
+ if ($fmt =~ /^([^\d]*)(.*)/) { $options=$1; $fmt=$2; }
+ #if ($options =~ /\$/) { $dollamode=1; }
+ #if ($options =~ /,/) { $commamode=1; }
+ if ($options =~ /\./) { $alwaysperiod=1; }
+ my $result;
+ if ($fmt=~/s$/i) {
+ $result=&format_significant_figures($value,$fmt);
+ } else {
+ $fmt=~s/e/E/g;
+ $result=sprintf('%.'.$fmt,$value);
+ if ($alwaysperiod && $fmt eq '0f') { $result .='.'; }
+ $result=~s/(E[+-]*)0/$1/;
+ }
+ #if ($dollarmode) {$result=&dollarformat($result);}
+ #if ($commamode) {$result=&commaformat($result);}
+ return $result;
+}
+
+sub chemparse {
+ my ($reaction) = @_;
+ my @tokens = split(/(\s\+|\->|<=>|<\-|\.)/,$reaction);
+ my $formula = '';
+ foreach my $token (@tokens) {
+ if ($token eq '->' ) {
+ $formula .= '\ensuremath{\rightarrow} ';
+ next;
+ }
+ if ($token eq '<-' ) {
+ $formula .= '\ensuremath{\leftarrow} ';
+ next;
+ }
+ if ($token eq '<=>') {
+ if ($external::target eq 'web' &&
+ &EXT('request.browser.unicode')) {
+ $formula .= '⇌ ';
+ } else {
+ $formula .= &web('<=> ','\ensuremath{\rightleftharpoons} ',
+ '<=> ');
+ }
+ next;
+ }
+ if ($token eq '.') {
+ $formula =~ s/(\ \;| )$//;
+ $formula .= '·';
+ next;
+ }
+ $token =~ /^\s*([\d|\/]*(?:&frac\d\d)?)(.*)/;
+ $formula .= $1 if ($1 ne '1'); # stoichiometric coefficient
+
+ my $molecule = $2;
+ # subscripts
+ $molecule =~ s|(?<=[a-zA-Z\)\]\s])(\d+)|$1|g;
+ # superscripts
+ $molecule =~ s|\^(\d*[+\-]*)|$1|g;
+ # strip whitespace
+ $molecule =~ s/\s*//g;
+ # forced space
+ $molecule =~ s/_/ /g;
+ $molecule =~ s/-/−/g;
+ $formula .= $molecule.' ';
+ }
+ # get rid of trailing space
+ $formula =~ s/(\ \;| )$//;
+ return &xmlparse($formula);
+}
+
+sub prettyprint {
+ my ($value,$fmt,$target)=@_;
+ my $result;
+ if (!$target) { $target = $external::target; }
+ if ($fmt =~ /chem/i) { return(&chemparse($value)); }
+ my ($dollarmode,$commamode,$alwaysperiod,$options);
+ if ($fmt =~ /^([^\d]*)(.*)/) { $options=$1; $fmt=$2; }
+ if ($options =~ /\$/) { $dollarmode=1; }
+ if ($options =~ /,/) { $commamode=1; }
+ if ($options =~ /\./) { $alwaysperiod=1; }
+ if ($fmt=~/s$/i) {
+ $value=&format_significant_figures($value,$fmt);
+ } elsif ($fmt) {
+ $value=sprintf('%.'.$fmt,$value);
+ }
+ if ($alwaysperiod && $fmt eq '0f') {
+ if ($target eq 'tex') {
+ $value .='\\ensuremath{.}';
+ } else {
+ $value .='.';
+ }
+ }
+ if ($value =~ /([0-9\.\-\+]+)E([0-9\-\+]+)/i ) {
+ my $frac=$1;
+ if ($dollarmode) { $frac=&dollarformat($frac); }
+ if ($commamode) { $frac=&commaformat($frac); }
+ my $exponent=$2;
+ $exponent=~s/^\+0*//;
+ $exponent=~s/^-0*/-/;
+ $exponent=~s/^-0*/-/;
+ if ($exponent eq '-') { undef($exponent); }
+ if ($exponent) {
+ if ($target eq 'web') {
+ $result=$frac.'×10'.$exponent.'';
+ } elsif ($target eq 'tex') {
+ $result='\ensuremath{'.$frac.'\times 10^{'.$exponent.'}}';
+ } else {
+ $result=$value;
+ }
+ } else {
+ $result=$frac;
+ }
+ } else {
+ $result=$value;
+ if ($dollarmode) { $result=&dollarformat($result,$target); }
+ elsif ($commamode) { $result=&commaformat($result,$target); }
+ }
+ return $result;
+}
+
+sub commaformat {
+ my ($number,$target) = @_;
+ if ($number =~ /\./) {
+ while ($number =~ /([^0-9]*)([0-9]+)([^\.,][^\.,][^\.,])([,0-9]*\.[0-9]*)$/) {
+ $number = $1.$2.','.$3.$4;
+ }
+ } else {
+ while ($number =~ /^([^0-9]*)([0-9]+)([^,][^,][^,])([,0-9]*)$/) {
+ $number = $1.$2.','.$3.$4;
+ }
+ }
+ return $number;
+}
+
+sub dollarformat {
+ my ($number,$target) = @_;
+ if (!$target) { $target = $external::target; }
+ $number=&commaformat($number,$target);
+ if ($target eq 'tex') {
+ $number='\$'.$number; #' stupid emacs
+ } else {
+ $number='$'.$number; #' stupid emacs
+ }
+ return $number;
+}
+
+# format of form ns or nS where n is an integer
+sub format_significant_figures {
+ my ($number,$format) = @_;
+ return '0' if ($number == 0);
+ # extract number of significant figures needed
+ my ($sig) = ($format =~ /(\d+)s/i);
+ # arbitrary choice - suggestions ?? or throw error message?
+ $sig = 3 if ($sig eq '');
+ # save the minus sign
+ my $sign = ($number < 0) ? '-' : '';
+ $number = abs($number);
+ # needed to correct for a number greater than 1 (or
+ my $power = ($number < 1) ? 0 : 1;
+ # could round up. Take the integer part of log10.
+ my $x10 = int(log($number)/log(10));
+ # find number with values left of decimal pt = # of sign figs.
+ my $xsig = $number*10**($sig-$x10-$power);
+ # get just digits left of decimal pt - also rounds off correctly
+ my $xint = sprintf('%.0f',$xsig);
+ # save any trailing zero's
+ my ($zeros) = ($xint =~ /(0+)$/);
+ # return number to original magnitude
+ my $numSig = $xint*10**($x10-$sig+$power);
+ # insert trailing zero's if have decimal point
+ $numSig =~ s/^(\d+)\.(\d+)(\e?(.*)?)$/$1\.$2$zeros$3/;
+ # put a decimal pt for number ending with 0 and length = # of sig fig
+ $numSig.='.' if (length($numSig) == $sig && $numSig =~ /0$/);
+ if (length($numSig) < $sig) {
+ $numSig.='.'.substr($zeros,0,($sig-length($numSig)));
+ }
+ # return number with sign
+ return $sign.$numSig;
+
}
sub map {
my ($phrase,$dest,$source)=@_;
+ my @oldseed=&random_get_seed();
my @seed = &random_seed_from_phrase($phrase);
&random_set_seed(@seed);
my $destct = scalar(@$dest);
@@ -450,6 +1050,7 @@ sub map {
$output[$ctr] = $$dest[$idx[$ctr]];
$ctr++;
}
+ &random_set_seed(@oldseed);
return @output;
} else {
my $num = scalar(@$source);
@@ -469,10 +1070,13 @@ sub map {
}
}
}
+ &random_set_seed(@oldseed);
+ return '';
}
sub rmap {
my ($phrase,$dest,$source)=@_;
+ my @oldseed=&random_get_seed();
my @seed = &random_seed_from_phrase($phrase);
&random_set_seed(@seed);
my $destct = scalar(@$dest);
@@ -490,6 +1094,7 @@ sub rmap {
$output[$ctr] = $$dest[$r_idx[$ctr]];
$ctr++;
}
+ &random_set_seed(@oldseed);
return @output;
} else {
my $num = scalar(@$source);
@@ -515,6 +1120,8 @@ sub rmap {
}
}
}
+ &random_set_seed(@oldseed);
+ return '';
}
sub capa_id { return }
@@ -522,108 +1129,215 @@ sub capa_id { return }
sub problem { return }
sub name{
- my $fullname = &EXT('environment.lastname').', '.&EXT('environment.firstname').' '.&EXT('environment.middlename');
- $fullname = "" if $fullname eq ", ";
- $fullname =~ s/\%2d/-/g;
- return $fullname;
+ my $fullname = &EXT('environment.lastname').', '.&EXT('environment.firstname').' '.&EXT('environment.middlename');
+ $fullname = "" if $fullname eq ", ";
+ $fullname =~ s/\%2d/-/g;
+ return $fullname;
}
sub student_number {
- my $id = &EXT('environment.id');
- $id = '' if $id eq "";
- return $id;
+ my $id = &EXT('environment.id');
+ $id = '' if $id eq "";
+ return $id;
}
sub class {
- my $course = &EXT('course.description');
- $course = '' if $course eq "";
- return $course;
+ my $course = &EXT('course.description');
+ $course = '' if $course eq "";
+ return $course;
+}
+
+sub classid {
+ my $courseid = &EXT('request.course.id');
+ $courseid = '' if $courseid eq "";
+ return $courseid;
+}
+
+sub firstname {
+ my $firstname = &EXT('environment.firstname');
+ $firstname = '' if $firstname eq "";
+ return $firstname;
+}
+
+sub middlename {
+ my $middlename = &EXT('environment.middlename');
+ $middlename = '' if $middlename eq "";
+ return $middlename;
+}
+
+
+sub lastname {
+ my $lastname = &EXT('environment.lastname');
+ $lastname = '' if $lastname eq "";
+ return $lastname;
}
sub sec {
- my $sec = &EXT('request.course.sec');
- $sec = '' if $sec eq "";
- return $sec;
+ my $sec = &EXT('request.course.sec');
+ $sec = '' if $sec eq "";
+ return $sec;
+}
+
+sub submission {
+ my ($partid,$responseid,$subnumber)=@_;
+ my $sub='';
+ if ($subnumber) { $sub=$subnumber.':'; }
+ return &EXT('user.resource.'.$sub.'resource.'.$partid.'.'.$responseid.'.submission');
+}
+
+sub currentpart {
+ return $external::part;
+}
+
+sub eval_time {
+ my ($timestamp)=@_;
+ unless ($timestamp) { return ''; }
+ return &locallocaltime($timestamp);
}
sub open_date {
- my @dc = split(/\s+/,localtime(&EXT('resource.0.opendate')));
- return '' if ($dc[0] eq "Wed" and $dc[2] == 31 and $dc[4] == 1969);
- my @hm = split(/:/,$dc[3]);
- my $ampm = " am";
- if ($hm[0] > 12) {
- $hm[0]-=12;
- $ampm = " pm";
- }
- return $dc[0].', '.$dc[1].' '.$dc[2].', '.$dc[4].' at '.$hm[0].':'.$hm[1].$ampm;
-}
-
-sub due_date {
- my @dc = split(/\s+/,localtime(&EXT('resource.0.duedate')));
- return '' if ($dc[0] eq "Wed" and $dc[2] == 31 and $dc[4] == 1969);
- my @hm = split(/:/,$dc[3]);
- my $ampm = " am";
- if ($hm[0] > 12) {
- $hm[0]-=12;
- $ampm = " pm";
- }
- return $dc[0].', '.$dc[1].' '.$dc[2].', '.$dc[4].' at '.$hm[0].':'.$hm[1].$ampm;
-# return $dc[0].', '.$dc[1].' '.$dc[2].', '.$dc[4].' at '.$dc[3];
+ my ($partid)=@_;
+ unless ($partid) { $partid=0; }
+ return &eval_time(&EXT('resource.'.$partid.'.opendate'));
+}
+
+sub due_date {
+ my ($partid)=@_;
+ unless ($partid) { $partid=0; }
+ return &eval_time(&EXT('resource.'.$partid.'.duedate'));
}
sub answer_date {
- my @dc = split(/\s+/,localtime(&EXT('resource.0.answerdate')));
- return '' if ($dc[0] eq "Wed" and $dc[2] == 31 and $dc[4] == 1969);
- my @hm = split(/:/,$dc[3]);
- my $ampm = " am";
- if ($hm[0] > 12) {
- $hm[0]-=12;
- $ampm = " pm";
- }
- return $dc[0].', '.$dc[1].' '.$dc[2].', '.$dc[4].' at '.$hm[0].':'.$hm[1].$ampm;
-# return $dc[0].', '.$dc[1].' '.$dc[2].', '.$dc[4].' at '.$dc[3];
+ my ($partid)=@_;
+ unless ($partid) { $partid=0; }
+ return &eval_time(&EXT('resource.'.$partid.'.answerdate'));
+}
+
+sub open_date_epoch {
+ my ($partid)=@_;
+ unless ($partid) { $partid=0; }
+ return &EXT('resource.'.$partid.'.opendate');
+}
+
+sub due_date_epoch {
+ my ($partid)=@_;
+ unless ($partid) { $partid=0; }
+ return &EXT('resource.'.$partid.'.duedate');
+}
+
+sub answer_date_epoch {
+ my ($partid)=@_;
+ unless ($partid) { $partid=0; }
+ return &EXT('resource.'.$partid.'.answerdate');
+}
+
+sub parameter_setting {
+ my ($which,$partid)=@_;
+ unless ($partid) { $partid=0; }
+ return &EXT('resource.'.$partid.'.'.$which);
+}
+
+sub stored_data {
+ my ($which,$partid)=@_;
+ unless ($partid) { $partid=0; }
+ return &EXT('user.resource.resource.'.$partid.'.'.$which);
+}
+
+sub wrong_bubbles {
+ my ($correct,$lower,$upper,$step,@given)=@_;
+ my @array=();
+ my %hash=();
+ foreach my $new (@given) {
+ $hash{$new}=1;
+ }
+ my $num=int(¶meter_setting('numbubbles',¤tpart()));
+ unless ($num) { $num=8; }
+ if ($num>1) {
+ for (my $i=0;$i<=500;$i++) {
+ my $new=&random($lower,$upper,$step);
+ if ($hash{$new}) { next; }
+ if (abs($new-$correct)<$step) { next; }
+ $hash{$new}=1;
+ @array=keys(%hash);
+ if ($#array+2>=$num) { last; }
+ }
+ }
+ return @array;
}
sub array_moments {
- my @input=@_;
- my (@output,$N);
- $N=scalar (@input);
- $output[0]=$N;
- if ($N <= 1) {
- $output[1]=$input[0];
- $output[1]="Input array not defined" if ($N == 0);
- $output[2]="variance undefined for N<=1";
- $output[3]="skewness undefined for N<=1";
- $output[4]="kurtosis undefined for N<=1";
+ my @input=@_;
+ my (@output,$N);
+ $N=scalar (@input);
+ $output[0]=$N;
+ if ($N <= 1) {
+ $output[1]=$input[0];
+ $output[1]="Input array not defined" if ($N == 0);
+ $output[2]="variance undefined for N<=1";
+ $output[3]="skewness undefined for N<=1";
+ $output[4]="kurtosis undefined for N<=1";
+ return @output;
+ }
+ my $sum=0;
+ foreach my $line (@input) {
+ $sum+=$line;
+ }
+ $output[1] = $sum/$N;
+ my ($x,$sdev,$var,$skew,$kurt) = 0;
+ foreach my $line (@input) {
+ $x=$line-$output[1];
+ $var+=$x**2;
+ $skew+=$x**3;
+ $kurt+=$x**4;
+ }
+ $output[2]=$var/($N-1);
+ $sdev=CORE::sqrt($output[2]);
+ if ($sdev == 0) {
+ $output[3]="inf-variance=0";
+ $output[4]="inf-variance=0";
+ return @output;
+ }
+ $output[3]=$skew/($sdev**3*$N);
+ $output[4]=$kurt/($sdev**4*$N)-3;
return @output;
- }
- my $sum=0;
- foreach my $line (@input) {
- $sum+=$line;
- }
- $output[1] = $sum/$N;
- my ($x,$sdev,$var,$skew,$kurt) = 0;
- foreach my $line (@input) {
- $x=$line-$output[1];
- $var+=$x**2;
- $skew+=$x**3;
- $kurt+=$x**4;
- }
- $output[2]=$var/($N-1);
- $sdev=sqrt($output[2]);
- if ($sdev == 0) {
- $output[3]="inf-variance=0";
- $output[4]="inf-variance=0";
- return @output;
- }
- $output[3]=$skew/($sdev**3*$N);
- $output[4]=$kurt/($sdev**4*$N)-3;
- return @output;
}
sub choose {
- my $num = $_[0];
- return $_[$num];
+ my $num = $_[0];
+ return $_[$num];
}
+#&sum1(1,$x,sub { &sum1($_[0],2*$_[0], sub { fact($_[0])**2 })});
+#sub sum1 {
+# my ($start,$end,$sub)=@_;
+# my $sum=0;
+# for (my $i=$start;$i<=$end;$i++) {
+# $sum+=&$sub($i);
+# }
+# return $sum
+#}
+
+#&sum2('a',1,$x,'&sum2(\'b\',$a,2*$a, \'&factorial($b)**2\')');
+#sub sum2 {
+# my ($varname,$start,$end,$line)=@_;
+# my $sum=0;
+# for (my $i=$start;$i<=$end;$i++) {
+# my $func=sub {
+# eval("\$".$varname."=$i");
+# eval($line);
+# };
+# $sum+=&$func($i);
+# }
+# return $sum
+#}
+
+# expiremental idea
+sub proper_path {
+ my ($path)=@_;
+ if ( $external::target eq "tex" ) {
+ return '/home/httpd/html'.$path;
+ } else {
+ return $path;
+ }
+}
500 Internal Server Error
Internal Server Error
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misconfiguration and was unable to complete
your request.
Please contact the server administrator at
root@localhost to inform them of the time this error occurred,
and the actions you performed just before this error.
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in the server error log.