Added Undo Functionality, Closes #53 and #63

[hkirat]

No description provided.

[hkirat]

The First Commit fixes 64. It is a general method to follow and isn't browser specific.

The commits that follow add functionality to undo a previously made move.
It works as follows :
A global GTE.TREE.CHANGES array stores the nodes that are changed in a particular move.
I've introduced a "Changes" class to keep track of a particular change.
Whenever the user calls undo, the Changes array is popped and the previous state is restored.
The method followed is different from the ones suggested in #53, though it is partly based on the second suggestion. Rather than the complete state I'm just storing the changes after each move.
Hope it makes sense.

[kagolaub]

I very much like this implementation; it was very similar to my own. Good work hkirat!

[stengel]

Dear Harkirat,

I am one of the GSoC organizers and saw your impressive
quick solution of UNDO and other things (there will be more
details needed but it is a good start). Can you email me
directly to talk about your possible involvement with
Gambit/GTE as a GSoC student if you are interested?

Best regards,
--Bernhard

• harkirat singh notifications@github.com [17-03-2016 20:35:11 -0700]:

The First Commit fixes 64. It is a general method to follow and isn't browser specific.

The commits that follow add functionality to undo a previously made move.
It works as follows :
A global GTE.TREE.CHANGES array stores the nodes that are changed in a particular move.
I've introduced a "Changes" class to keep track of a particular change.
Whenever the user calls undo, the Changes array is popped and the previous state is restored.
The method followed is different from the ones suggested in #53, though it is partly based on the second suggestion. Rather than the complete state I'm just storing the changes after each move.
Hope it makes sense.

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#66 (comment)

Prof Bernhard von Stengel email: stengel@nash.lse.ac.uk
Department of Mathematics http://www.maths.lse.ac.uk/Personal/stengel
London School of Economics phone: +44-20-7955 6438 (office)
Houghton St, Room COL 4.12 +44-20-7226 2325 (home)
London WC2A 2AE, United Kingdom

[hkirat]

Thanks guys!
@stengel Mailed to stengel@nash.lse.ac.uk