Log of /trunk/pg/lib/Value/List.pm
Parent Directory
Revision
3192 -
(
view)
(
download)
(
as text)
(
annotate)
-
[select for diffs]
Modified
Wed Mar 16 13:30:28 2005 UTC (8 years, 2 months ago) by
dpvc
File length: 4394 byte(s)
Diff to
previous 2800
Update the overloaded operators so that they can be overridden by
subclasses of the predefined object classes. This involves calling
the objects method rather than using a hard reference to the routine
in the parent class.
Also, change the name of the string comparison routine to
compare_string to avoid conflicts with cmp that is used to produce the
answer checker for the class.
Finally, in Value.pm, promotePrecedence no longer has to do fancy
footwork to get "special" precedence to work (this was a hack to get
around the misfeature of the overloaded operators -- now that that is
being handled correctly, there is no need for it).
Revision
2800 -
(
view)
(
download)
(
as text)
(
annotate)
-
[select for diffs]
Modified
Sun Sep 19 14:27:39 2004 UTC (8 years, 8 months ago) by
dpvc
File length: 4314 byte(s)
Diff to
previous 2629
Added isZero and isOne checks for Parser::Value objects (i.e., for
constants within formulas). These now correctly handle vector and
matrices, in particular. The isOne and isZero checks are used in the
reduce() method to simplify formulas.
Revision
2629 -
(
view)
(
download)
(
as text)
(
annotate)
-
[select for diffs]
Modified
Tue Aug 17 02:01:27 2004 UTC (8 years, 9 months ago) by
dpvc
File length: 4284 byte(s)
Diff to
previous 2625
Fixed a number of minor problems with creating perl functions from
formulas (this is done automatically as part of the function answer
checker, so is showing up now that I have that checker in place).
Also improved error messages in the function answer checker, and fixed
a bug when students enter a constant list or union when the answer
checker expects formulas.
Revision
2625 -
(
view)
(
download)
(
as text)
(
annotate)
-
[select for diffs]
Modified
Mon Aug 16 18:35:12 2004 UTC (8 years, 9 months ago) by
dpvc
File length: 4261 byte(s)
Diff to
previous 2621
Added string comparison to all Value object classes (to compare the
string value of an object to another string).
Overloaded perl '.' operator to do dot product when the operands are
formulas returning vectors. (Part of the auto-generation of
formulas).
A few improvements to real and complex class output results.
Made Union class slightly more robust and removed need for makeUnion
method other than in the Union itself.
Revision
2621 -
(
view)
(
download)
(
as text)
(
annotate)
-
[select for diffs]
Modified
Sun Aug 15 17:05:41 2004 UTC (8 years, 9 months ago) by
dpvc
File length: 4258 byte(s)
Diff to
previous 2612
Improved error messages, particularly when the student enters a
formula in an answer that should be constant, and also for incorrect
answers in lists of answers. There are a few other miscellaneous output
improvements as well.
Revision
2606 -
(
view)
(
download)
(
as text)
(
annotate)
-
[select for diffs]
Modified
Sat Aug 14 11:25:47 2004 UTC (8 years, 9 months ago) by
dpvc
File length: 4063 byte(s)
Diff to
previous 2604
Can now specify that the objects stringify themselfs in their TeX
forms rather than their answer-string forms. This makes it easier to
use the objects in the text of a problem (without having to call ->TeX
explicitly each reference).
Use
Context()->texStrings
to start outputting TeX strings, and
Context()->normalStrings
to switch back.
Revision
2599 -
(
view)
(
download)
(
as text)
(
annotate)
-
[select for diffs]
Modified
Fri Aug 13 14:19:23 2004 UTC (8 years, 9 months ago) by
dpvc
File length: 4065 byte(s)
Diff to
previous 2592
The List object's answer checker is now considerably improved. It
will allow you to specify an unorderd or ordered check, and whether to
print various kinds of hints for wrong answers.
The checker can return partial credit, but WW doesn't deal well with
this at the moment (some small changes to Problem.pm can take care of
that). Partial credit should be based on $showPartialCorrectAnswers,
but it is disabled for now.
The list answer checker probably still needs some work, especially
with non-numeric lists.
Revision
2592 -
(
view)
(
download)
(
as text)
(
annotate)
-
[select for diffs]
Modified
Thu Aug 12 16:40:47 2004 UTC (8 years, 9 months ago) by
dpvc
File length: 3884 byte(s)
Diff to
previous 2579
A number of small fixes. Most were to fix minor bugs in string and
TeX output, particulary for the various list-based objects (like
vectors, intervals, etc.). There were also some bug fixes in the
comparison routines. Some additional checks were added for valid
intervals when the coordinates are formulas.
Revision
2579 -
(
view)
(
download)
(
as text)
(
annotate)
-
[select for diffs]
Modified
Mon Aug 9 21:38:01 2004 UTC (8 years, 9 months ago) by
dpvc
File length: 3521 byte(s)
Diff to
previous 2558
Significant update to new parser.
New features include:
Better control over format of vector output (you can now
specify ijk-format rather than <...> format)
"Fuzzy" reals, where the relations like == return true when the
two values are "close enough". (This is controlable using
parameters similar to those used in NUM_CMP).
The fuzzy reals are now used in vectors/points/matrices/complexes/intervals
and so on so that their relations will also be fuzzy. E.g.,
(1E-13,2) == (0,3) will be true, and norm(Vector(0,1E-13)) will
equal 0.
The two main portions of the parser (the Parser and Value packages)
now share a common context object for configuration purposes.
This form allows you to request diffs between any two revisions of this file.
For each of the two "sides" of the diff,
enter a numeric revision.
