RE: trees?

  • From: "Homme, James" <james.homme@xxxxxxxxxxxx>
  • To: "programmingblind@xxxxxxxxxxxxx" <programmingblind@xxxxxxxxxxxxx>
  • Date: Thu, 21 Oct 2010 15:57:19 -0400

Hi, I have a feeling that the answer to this is Yes. Would this kind of thing 
also work for pieces that have limited movement? For example, a pawn can only 
move forward, but it can move two spaces on its first move. But a special case 
is that it captures by moving diagonally. Is this the same kind of thing or 
different?

Thanks.

Jim

Jim Homme,
Usability Services,
Phone: 412-544-1810. Skype: jim.homme
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-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx 
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of black ares
Sent: Thursday, October 21, 2010 2:14 PM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: trees?

this is yet another individual representing the class of stupid professors.
Please, for the N-queens problem
read about backtracking and you will get the point.
If you read about recursive back tracking you will even get the point
regarding the tree representation of this problem.
How ever, the backtracking programing algorithm
is a static one, by static I mean, that
it has a fixed form where you only change data and a little operation and
from a problem you get another.
For example if you have a solution for another problem in backtracking, you
can simply change somthing little there and you will get the n-queens
problem.
The recursive backtracking is easier to understand than iterative one, but
this is just my point of view.
So your problem now is not to understand what a tree is, or how this problem
is represented on a tree,
now your problem is to learn about back tracking and how to solve that
problems.
Sighted professors often tend to graphicaly represent all the things even
they didn't need to!
And also often the graphical representation is most disturbing than
explaining.
When you will realy need a tree like a abstract data structure, you will
understand it very well.


----- Original Message -----
From: "Ken Perry" <whistler@xxxxxxxxxxxxx>
To: <programmingblind@xxxxxxxxxxxxx>
Sent: Wednesday, October 20, 2010 7:46 PM
Subject: RE: trees?


> You know how I did it in my software engineering class before I did the
> file
> and outline?  I wrote an asm black white tree and followed it in a
> debugger.
> Hmm is that a little nuts?
>
> Ken
>
> -----Original Message-----
> From: programmingblind-bounce@xxxxxxxxxxxxx
> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Sina Bahram
> Sent: Wednesday, October 20, 2010 11:42 AM
> To: programmingblind@xxxxxxxxxxxxx
> Subject: RE: trees?
>
> I think that you should sit down with either her or someone  else who
> fully
> understands the concept, and concentrate on
> understanding how trees work, rather than being hung up on the
> representation.
>
> I'll volunteer to offer some info over skype or phone, and there should be
> some good websites on this, but concepts like this need
> to be explained in person/voice, not just by reading about them, although
> you can get a lot that way too.
>
> Take care,
> Sina
>
> -----Original Message-----
> From: programmingblind-bounce@xxxxxxxxxxxxx
> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Alex Hall
> Sent: Wednesday, October 20, 2010 10:33 AM
> To: programmingblind
> Subject: trees?
>
> Hi all,
> We are doing trees in an algorithms class I am taking. The assignment
> coming
> up is the "n queens" problem, where you have an n by n
> board and must place n queens on the board such that no two queens share
> the
> same row, column, or diagonal line. To "help" explain
> this, the professor is using a tree on the board. I am completely
> confused!
> She says I do not need to think of it in terms of trees,
> yet the only way she explains it is in tree terms, so I am not sure what
> she
> is talking about. Of course I know about trees, but
> when she tries to explain how the code we are looking at relates to the
> tree
> in terms of what the code is supposed to do, I haven't
> a clue as to what she is trying to say. Does anyone have any thoughts on
> how
> to represent trees, whether in braille or speech, or a
> good notation/substitute for a tree? TIA.
>
> --
> Have a great day,
> Alex (msg sent from GMail website)
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