as3多维数组

Question

我试图做一个多维数组，但我得到一个错误（“TypeError：错误＃1010：一个术语是未定义的，没有属性。”）。

var matriz:Array = new Array(); 
for(var p:Number = 0; p<2;p++){ 
    for(var q:Number = 0; q<2;q++){ 
     matriz[p][q] = 0; 
    } 
} 

我做错了什么？

在此先感谢！

Answer 1

您需要在matriz[p]之内创建一个数组，然后才能向其中添加数组（或其他任何数据）。

你可以实现你尝试没有这样的错误是什么：

var matriz:Array = []; 

for(var p:Number = 0; p<2; p++) 
{ 
    // Create an array at matriz[p] if undefined. 
    if(matriz[p] == undefined) matriz[p] = []; 

    for(var q:Number = 0; q<2; q++) 
    { 
     matriz[p][q] = 0; 
    } 
} 

基本上你试图做此相同：

var object:Object = {}; 
object.nonexistantProperty.value = 10; 

Answer 2

什么马蒂说是正确的。然而，我更喜欢删除if条件并将代码更改为以下内容：

var matriz:Array = []; 

for(var p:Number = 0; p<2; p++) { 
    matriz[p] = []; 
    for(var q:Number = 0; q<2; q++) { 
     matriz[p][q] = 0; 
    } 
} 

Answer 3

public class cArray 
{ 

    private var DIM1CAP:uint=0; 
    private var DIM2CAP:uint=1; 
    private var DIM3CAP:uint=2; 
    private var DIM4CAP:uint=3; 
    private var DIM5CAP:uint=4; 

    public function cArray():void 
    { 
     // avoid the noid 
    } 

    // returns empty array of args.length dimensions 
    // 1st argument is dim 1 capacity; 2nd is dim 2, etc. 
    public function getArray (... args):Array 
    { 
     var arr = new Array(); 

     if (paramsNotValid(args)) 
     { 
      return null; 
     } 

     switch (args.length) 
     { 
      case 2: 
       arr = get2DArray (args[0], args[1]); 
       break; 

      case 3: 
       arr = get3DArray (args[0], args[1], args[2]); 
       break; 

      case 4: 
       arr = get4DArray (args[0], args[1], args[2], args[3]); 
       break; 

      case 5: 
       arr = get5DArray (args[0], args[1], args[2], args[3], args[4]); 
       break; 

      default: 

       break; 
     } 



     return arr; 
    } 


    // returns empty 2d array of parameter specified capacity 
    private function get2DArray (_1stDimCapacity:uint, _2ndDimCapacity:uint):Array 
    { 
     var arr2d:Array = []; 
     var arr1d = new Array(); 

     for (var i:uint=0; i<_1stDimCapacity; i++) 
     { 
      arr1d[_2ndDimCapacity-1] = undefined; 
      arr2d.push(arr1d); 
      arr1d = new Array(); 
     } 
     return arr2d; 
    } 

    // returns empty 3d array of parameter specified capacity 
    private function get3DArray (dim1Cap:uint, 
            dim2Cap:uint, 
            dim3Cap:uint):Array 
    { 
     var arr3d = new Array(); 

     for (var i:uint=0; i<dim1Cap; i++) 
     { 
      arr3d.push (get2DArray (dim2Cap, dim3Cap)); 
     } 
     return arr3d; 
    } 

    // returns empty 4d array of parameter specified capacity 
    private function get4DArray (dim1Cap:uint, 
            dim2Cap:uint, 
            dim3Cap:uint, 
            dim4Cap:uint):Array 
    { 
     var arr4d = new Array(); 

     for (var i:uint=0; i<dim1Cap; i++) 
     { 
      arr4d.push (get3DArray (dim2Cap, dim3Cap, dim4Cap)); 
     } 
     return arr4d; 
    } 

    // returns empty 5d array of parameter specified capacity 
    private function get5DArray (dim1Cap:uint, 
            dim2Cap:uint, 
            dim3Cap:uint, 
            dim4Cap:uint, 
            dim5Cap:uint):Array 
    { 
     var arr5d = new Array(); 

     for (var i:uint=0; i<dim1Cap; i++) 
     { 
      arr5d.push (get4DArray (dim2Cap, dim3Cap, dim4Cap, dim5Cap)); 
     } 
     return arr5d; 
    } 

    ////////////////////////////////////////////////////// 
    private function paramsNotValid (args:Array):Boolean 
    { 
     if (args.length<2 || args.length>5) 
     { 
      return true; 
     } 

     for (var i:uint=0; i<args.length; i++) 
     { 
      if (! (args[i]>0)) 
      { 
       break; 
      } 
     } 

     if (i < args.length) 
     { 
      return true; 
     } 
     return false; 
    } 

} 

}

公共类CMAIN延伸的MovieClip {

var cArr:cArray = new cArray; 


    public function cMain():void 
    { 
     var arr2d:Array; 
     var arr3d:Array; 
     var chessBrd_4d:Array; 
     var arr5d:Array; 

     // capacity of 10 games; 150 moves/gm; white's mv or black's; 
     // - piece positions; move in chess notation (index 32 of 
     // - last dimension); commentary (index 33 of last dimension) 
     chessBrd_4d = cArr.getArray(10,150,2,34); 

     // adding data 
     // - 4th game, 8th move, white's move, positions of pieces 
     chessBrd_4d[3][7][0][0] = 'd8'; 
     chessBrd_4d[3][7][0][1] = 'b1'; 
     //    ... 
     // - positions of pieces up to last one 
     //    ... 
     // - last piece pos 
     chessBrd_4d[3][7][0][31] = 'captured'; 
     // - actual move in chess notation 
     chessBrd_4d[3][7][0][32] = 'nC4'; 
     // - annotation 
     chessBrd_4d[3][7][0][33] = 'blocks b pawn, ' + 
            'opens diag for c1 bishop, ' + 
            'Justin Beiber is a putz, ' + 
            'the president is liar' 

     trace ('piece 0 is on square ' + chessBrd_4d[3][7][0][0]); 
     trace ('piece 1 is on square ' + chessBrd_4d[3][7][0][1]); 
     trace (' ... ') 
     trace ('piece 31 has been ' + chessBrd_4d[3][7][0][31]); 
     trace ('move: ' + chessBrd_4d[3][7][0][32]); 
     trace (chessBrd_4d[3][7][0][33]); 
     /* 
     trace results: 
     piece 0 is on square d8 
     piece 1 is on square b1 
     ... 
     piece 31 has been captured 
     move: nC4 
     blocks b pawn, opens diag for c1 bishop, 
     Justin Beiber is a putz, the president is liar 
     */ 

     /* 
     trace (chessBrd_4d.length); = 10 
     trace (chessBrd_4d [ 2 ].length); = 150 
     trace (chessBrd_4d [ 2 ] [ 4 ].length); = 2 
     trace (chessBrd_4d [ 2 ] [ 4 ] [ 1 ].length); = 34 
     trace (chessBrd_4d [ 2 ] [ 4 ] [ 0 ] .length); = 34 
     */ 

    } 
}