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I am having trouble declaring and using a 2 dimensional array in javascript using unity 3.3

var x2: int[,]; no error but then errors later  
var x2:int[5,5]; //error excpecting semicolon at the end.

x2[4][4]=0;  

Debug.Log(x2[4][4]); //error BCE0109: Array 'self.x2' is rank '2', not rank '1'.and
                       type int does not support slicing.

So many errors? I'm following examples other people have posted about the multidimensional arrays in javascript in 3.2

Any ideas? thanks Dan

Answer 1

0

Javascript 2d arrays are tricky. I ended up looking up C# 2d arrays and then moved the syntax to javascript and it worked. Here's what I found worked:

var myArray : int[,] = new int[5,5];
myArray[0,1] = 42;
for(var X : int = 0; X < myArray.Length(0); X++)
    for(var Y: int = 0; Y < myArray.Length(1); Y++)
    {
        myArray[X,Y] = X+Y;
        Debug.Log(myArray[X,Y]);
    }

That should be all the information you need to work with and loop through 2d arrays.

answered Aug 02 '11 at 08:11 PM

SilverTabby
1.9k ● 3 ● 6 ● 18

Yep. That works. They should update the docs under arrays with your suggestions about how to use them.

Aug 03 '11 at 06:35 PM dansav

Fascinating that the "length" is a kind of a function across the dimensions!! Would never have guessed, and it's totally undocumented of course. Cheers.

Jun 02 '12 at 02:30 PM Fattie

The length calls in unityscript gives me... BCE0077: It is not possible to invoke an expression of type 'int'. What's up with that?

Mar 11 at 06:32 PM Jason.King

It should get GetLength, not Length.

Mar 11 at 08:48 PM Eric5h5

Thanks Eric5h5! GetLength compiles. But where is that documented? Even after knowing the proper semantics, I'm having trouble finding a definitive entry within language docs. I assume there may be other functionality attached to multidimensional arrays. Where can I find the complete set available to unityscript?

Mar 11 at 10:13 PM Jason.King

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