Multi Dimensional Arrays

[jess]

HELP ME SOMEONE PLEEEEASE!!! I need to create a multi-dimensional array...(?) - and thats all I know.... (well almost!)

[IFZen]

The thing is to build arrays of arrays.
For instance, you can define a two dimensional array like this :

var tMultiArray = new Array();
tMultiArray.push(new Array());

tMultiArray[0].push("toto");
tMultiArray[0].push("titi");

trace(tMultiArray[0][0]);
trace(tMultiArray[0][1]);

will give you that output :
toto
titi

Hope it helps,
BZen

[avatar]

I was looking for a solution on the forums and this thread was close to my problem so maybe someone could help me...

How do you "push" two arrays?

tMultiArray = new Array();
two = new Array();
two = [20, 30]

tMultiArray[0].push(two);

trace(tMultiArray[0][0]);

this doesn't work, unfortunately... what's wrong?

[senocular]

your problem is tMultiArray[0] isnt an array when you try to push something on it. you have to make it one first...

tMultiArray = new Array();
two = new Array();
two = [20, 30]

tMultiArray[0] = new Array();
tMultiArray[0].push(two);

trace(tMultiArray[0][0]); // 20, 30 

[mgb]

The most straightforward way is to make each array element an array-

tMultiArray = new Array();

tMultiArray[0] = new Array();
tMultiArray[1] = new Array();
.
.
.
tMultiArray[n] = new Array();

tMultiArray[0][0] = "a";
tMultiArray[0][1] = "b";

etc.

trace(tMultiArray[0][0]+" . "+tMultiArray[0][1]);

~mgb

[avatar]

thanx guys, got it working now...

[red penguin]

Like dees, mayn!

Array.prototype.arr_two_dee=function(x,y) {
    for (var i=0;i<x;i++) {
        this[i]=[y];
    }
};
// use
arr_test=[];
arr_test.arr_two_dee(4,4);
// a grid
for (x=0;x<=3;x++){
    for (y=0; y<=3; y++){
        arr_test[x][y]='['+x+']['+y+']';
    }
}

[PeterTang]

I having the headache on the multi-dimensional array for the past few days. Finally I got it solved after reading through the thread overhere. Thanks.

But I still have the question for the Push in the script here. What do this push do in the array? I could not understand? Can anyone tell me more about it?

Thanks in advanced.

[palabattle]

Originally Posted by jess

HELP ME SOMEONE PLEEEEASE!!! I need to create a multi-dimensional array...(?) - and thats all I know.... (well almost!)

Let's me introduce to you a good way with an example.

XML content:

<?xml version="1.0" standalone="yes"?>
<RECORDS>
  <RECORD>
    <ID>1</ID>
    <AlbumId>1</AlbumId>
    <SongId>1</SongId>
    <CommentWriter>asdasd</CommentWriter>
    <CommentReader>asdasdsddddd</CommentReader>
  <RECORD>
<RECORDS>

Actionscript 2.0

function processXMLData(success)
{
  if (success)
  {
	comments = this.firstChild.childNodes;
	for (var i = 0; i < comments.length; i++){
		albumId = comments[i].childNodes[1].childNodes; //AlbumId
		songId = comments[i].childNodes[2].childNodes; //SongId
		commentWriter = comments[i].childNodes[3].childNodes; //CommentWriter
		commentReader = comments[i].childNodes[4].childNodes; //CommentReader
		
        //Create the first array
		var tMultiArray = new Array();
        //Create the child array of fist array
		var tMultiArrayChild = new Array();		
		
        //Initial value for the child array
		tMultiArrayChild = ["AlbumId", albumId];
                //Then push the child to fist array
		tMultiArray.push(tMultiArrayChild);

        //Do it again
		tMultiArrayChild = ["SongId", songId];
		tMultiArray.push(tMultiArrayChild);
		
        //Do it again
		tMultiArrayChild = ["CommentWriter", commentWriter];
		tMultiArray.push(tMultiArrayChild);
		
        //Do it again
		tMultiArrayChild = ["CommentReader", commentReader];
		tMultiArray.push(tMultiArrayChild);
		
        //We need to collect all multiarray so then we can reuse it
		commentInfo.push(tMultiArray);		
	}

    //When all things are done, then just try to get all multiarray from commentInfo
	for (var i = 0; i < commentInfo.length; i++){
		trace(commentInfo[i][0][0] + "|" + commentInfo[i][0][1]);
		trace(commentInfo[i][1][0] + "|" + commentInfo[i][1][1]);
        trace(commentInfo[i][2][0] + "|" + commentInfo[i][2][1]);
        trace(commentInfo[i][3][0] + "|" + commentInfo[i][3][1]);
	}
  }
  else
  {
    content="Today's news is not found";
  }
}

What is the result of code above? Take a look at this.

AlbumId|1
SongId|1
CommentWriter|asdasd
CommentReader|asdasdsddddd
AlbumId|1
SongId|2
CommentWriter|qwerqwrqwrqwr
CommentReader|erqwrqrqwrqwr
AlbumId|1
SongId|3
CommentWriter|werwerwer
CommentReader|werwerwer
AlbumId|1
SongId|3
CommentWriter|awerqrqwr
CommentReader|rqwrqwrqwr
AlbumId|2
SongId|1
CommentWriter|eqwrqwrqwr
CommentReader|qwrqwrqwrqwr
AlbumId|1
SongId|1
CommentWriter|asdasdasd12
CommentReader|asdasdasd1
AlbumId|1
SongId|1
CommentWriter|241234123
CommentReader|123123213
AlbumId|1
SongId|1
CommentWriter|241234123a
CommentReader|123123213
AlbumId|1
SongId|1
CommentWriter|asdasd
CommentReader|asddddd

I hope this can help.