2d Arrays possible?

[risen_jihad]

Does anyone know if 2d arrays are possible? I've tinkered around but from what I've been doing, I don't think it's possible. If there is a way to get this working, it would much appreciated.

 

[AceHart]

Not possible, but you can fake it if you really feel like it.

Assuming something like array[x][y], where x goes from 0 to 3 and y from 0 to 2:

  x  0  1  2  3
y   -----------
0 |  0  1  2  3
1 |  4  5  6  7
2 |  8  9 10 11

The actual value would be array[x + 4 * y].

 

[MoonSlinger]

I do not think WE supports 2D arrays but you can use the normal array to emulate a 2D array.

Assume you want an array of VariableName[A]. Just create a normal array of VariableName[ A x B ]

To use infomation, use the formula (A-1) x (MaxB) + B
where A represents first reference, B represents the second reference and MaxB is the highest value for B. (A-1) is used because WE arrays start from 1, not 0.

For example,
You wanted an array for abilities called Spells[2][5] to store the abilities used in 2 spell-books each holding 5 abilities each. You would create Spells[10]

To refer to the 2nd spell of the 1st spell-book, it would have been Spells[1][2] on a 2D array. Reference to it from a normal array would be Spells[(1-1) x 5 + 2], or Spells[2]

To refer to the 4th spell of the 2nd spell-book, it would have been Spells[2][4] on a 2D array. Reference to it from a normal array would be Spells[(2-1) x 5 + 4] or Spells[9]

Understand?

 

[AceHart]

> WE arrays start from 1, not 0.

???

Where you got that from?

 

[Tt112233]

He probably means that the general convention for any starting value in WE is 1 (One of the reason being that there is no player 0), unlike all other programming languages where it's 0.

 

[SFilip]

> there is no player 0
There is. Player(0)=Player 1 (red).

> general convention for any starting value in WE is 1
It's 0. For everything.
But the wrapper for Trigger Editor's GUI from some reason add a +1 when calling most things. For example getting the ID of player 3 actually returns 2, but the wrapper function adds 1 to it.

 

[AceHart]

> that the general convention for any starting value in WE is 1

There is no such thing.

> unlike all other programming languages where it's 0.

No, it isn't.


> add a +1 when calling most things.

Most things? What most?
Careful with such general statements that really don't hold in general.

 

[MoonSlinger]

Seems like I should not generalize.

For GUI users, when creating an array, there is no "0" value for the array, therefore I stated that "WE arrays start from 1"

For Jass, I am a total Noobie, so i do not know anything about that

Last: My first respond was late, and AceHart already given the answer, so the problem should be solve Lets not deviate too much in case the thread starter have more questions.

 

[risen_jihad]

Not possible, but you can fake it if you really feel like it.

Darn, that's what I was assuming. Anyways, thanks all for the replys

 

[AceHart]

> For GUI users, when creating an array, there is no "0" value for the array

That's the size setting I guess?

Anyway, all arrays have the same size.
And can hold the same number of entries.
And the very first usable index is 0 (the last being 8191).
GUI, JASS, ... no difference.

 

[Tt112233]

> that the general convention for any starting value in WE is 1

There is no such thing.

> unlike all other programming languages where it's 0.

No, it isn't.


> add a +1 when calling most things.

Most things? What most?
Careful with such general statements that really don't hold in general.

I am a senior computer engineer and I can say with certainty that the general convention for the starting index of arrays is 0 for almost all programming languages.