Hi,

I was trying to do a folding algorithm in D and just got stuck on how to approach the problem - I must be missing something (math).

Given the following:

   2   1  - Both folds are from Left to Right - 1 is the fist fold
   V   V
 1 | 2 | 3
 --------- - 3 Bottom to Up
 4 | 5 | 6

result

 6 | 5 | 4
-----------
 1 | 2 | 3

If folds cover one another so that there is no crossover like in the first fold above then a multidimensional stack could be used.

There were some interesting solutions for squares like:
https://groups.google.com/forum/#!msg/comp.lang.ruby/lf4Zd9fvuYY/tjT2q65mcFAJ


But nothing like the above.
It isn't homework.

Cheers,
Rookie

On 03/18/2013 02:20 PM, rookie wrote:
> Hi,
>
> I was trying to do a folding algorithm in D and just got stuck on how to
> approach the problem - I must be missing something (math).
>
> Given the following:
>
>   2   1 - Both folds are from Left to Right - 1 is the fist fold
>   V   V
> 1 | 2 | 3
> --------- - 3 Bottom to Up
> 4 | 5 | 6
>
> result
>
> 6 | 5 | 4
> -----------
> 1 | 2 | 3

I have absolulety no idea what this is about but I am brave enough to offer a correction. :) According to my nil understanding the result should be the following:

6 | 4 | 5
-----------
3 | 1 | 2

Ali

On Monday, 18 March 2013 at 22:31:20 UTC, Ali Çehreli wrote:
> On 03/18/2013 02:20 PM, rookie wrote:
> > Hi,
> >
> > I was trying to do a folding algorithm in D and just got
> stuck on how to
> > approach the problem - I must be missing something (math).
> >
> > Given the following:
> >
> >   2   1 - Both folds are from Left to Right - 1 is the fist
> fold
> >   V   V
> > 1 | 2 | 3
> > --------- - 3 Bottom to Up
> > 4 | 5 | 6
> >
> > result
> >
> > 6 | 5 | 4
> > -----------
> > 1 | 2 | 3
>
> I have absolulety no idea what this is about but I am brave enough to offer a correction. :) According to my nil understanding the result should be the following:
>
> 6 | 4 | 5
> -----------
> 3 | 1 | 2
>
> Ali


Ali,

It about trying to get help with a problem that froze my brain.

Your diagram is:
Right X 1 Up, Left X 1 Up, Bottom Y 1 Up - Which is different from what I presented.

Look at the above fold as:
Left X 2 UP, Left X 1 Up, Bottom Y 1 Up - Where the numbers are physical location in an open sheet.

Try folding the paper according to the diagram above the first fold is 2nd from the left - 1 can't be in the middle for the above sequence, generally it's folding and counting from the top to bottom.

If all fold's from the left are within the sheet I don't have a problem but once something goes beyond the sheet like in the fist fold i'm stunned.

Cheers,
Rookie

rookie:

> There were some interesting solutions for squares like:
> https://groups.google.com/forum/#!msg/comp.lang.ruby/lf4Zd9fvuYY/tjT2q65mcFAJ

The Ruby code by Luke Blanshard converted to D:
http://codepad.org/gtWDdRoJ

Ruby is very flexible, and its multi-precision integers help avoid some bugs, but I often prefer the coding precision D offers.

Bye,
bearophile

On Tuesday, 19 March 2013 at 00:36:20 UTC, bearophile wrote:
> rookie:
>
>> There were some interesting solutions for squares like:
>> https://groups.google.com/forum/#!msg/comp.lang.ruby/lf4Zd9fvuYY/tjT2q65mcFAJ
>
> The Ruby code by Luke Blanshard converted to D:
> http://codepad.org/gtWDdRoJ
>
> Ruby is very flexible, and its multi-precision integers help avoid some bugs, but I often prefer the coding precision D offers.
>
> Bye,
> bearophile

Hi bearophile,

Thanks for the sample.

Someone gave me a direction to try out (once I've read the material) and I'll be writing it later.

Rookie

On Tuesday, 19 March 2013 at 00:36:20 UTC, bearophile wrote:
> rookie:
>
>> There were some interesting solutions for squares like:
>> https://groups.google.com/forum/#!msg/comp.lang.ruby/lf4Zd9fvuYY/tjT2q65mcFAJ
>
> The Ruby code by Luke Blanshard converted to D:
> http://codepad.org/gtWDdRoJ
>
> Ruby is very flexible, and its multi-precision integers help avoid some bugs, but I often prefer the coding precision D offers.
>
> Bye,
> bearophile

Hi bearophile,

Thanks for the sample.

Someone gave me a direction to try out (once I've read the
material) and I'll be writing it later.

Rookie