2D array in JS.

@RetroFiestaNov 25.2006

How do you create and access a 2D Array in Javascript?

Thanks,
Jason.

to post a comment

@so_is_thisNov 25.2006 — #

[CODE]
 var myArray = new Array(
 new Array(0, 1, 2),
 new Array(1, 2, 3)
 );
 alert(myArray[0][2]); // displays 2
 alert(myArray[1][2]); // displays 3[/CODE]

@RetroFiestaauthorNov 25.2006 — #Thank you.

Jason.

@KorNov 25.2006 — #Or you may use more friendly notation in [URL=http://www.json.org]JSON[/URL] :

<i>
 </i>var myArray=[
 [0,1,2],
 [1,2,3]
 ]

@so_is_thisNov 25.2006 — #Thank you.

Jason.[/QUOTE]
You're welcome.

Salud!

@PeterKieuDec 04.2007 — #Hi man!

I use my function to define an 2d array. Take a look:

function KArray2D(NumOfRows,NumOfCols)

{

var k=new Array(NumOfRows);

for (i = 0; i < k . length; ++ i)

k [i] = new Array (NumOfCols);

 return k; 
  }

Usage:

hiYou = new KArray2D(3,3); //3x3 array, or arbitrary

hiYou[0][0] = "Peter";

hiYou[0][1] = "Kieu";

hiYou[0][2] = "says";

hiYou[1][0] = "How";

hiYou[1][1] = "are";

hiYou[1][2] = "you";

hiYou[2][0] = "?";

hiYou[2][1] = "O";

hiYou[2][2] = "K";

Test: create file "test2D-array.htm" which has following content:

<html>

<body>

<script type="text/javascript">

function KArray2D(row,col)

{

var k=new Array(row);

for (i = 0; i < k . length; ++ i)

k [i] = new Array (col);

 return k; 
  }
  hiYou = new KArray2D(3,3); //3x3 array, or arbitrary
  hiYou[0][0] = "Peter ";
  hiYou[0][1] = "Kieu ";
  hiYou[0][2] = "says:";
  hiYou[1][0] = "How ";
  hiYou[1][1] = "are ";
  hiYou[1][2] = "you ";
  hiYou[2][0] = "?";
  hiYou[2][1] = "O";
  hiYou[2][2] = "K";
  document.write("Using 2d-array in JavaScript by Peter Kieu<br/>");
  document.write(hiYou[1][0]+hiYou[1][1]+hiYou[1][2]+hiYou[2][0]);

</script>

</body>

</html>

Run in IE or FireFox, I get:

Using 2d-array in JavaScript by Peter Kieu

How are you ?

@RetroFiestaauthorDec 05.2007 — #That is brilliant. Thank you.

It's always nice to see a practical ( working ) example of some code.

Jason.

@PeterKieuDec 05.2007 — #If you need more space in array, here is 3D array. 4/5/6D any-D array comes from same idea depends on JavaScript engine in IE/FireFox/Opera/Safari...

function KArray3D(row,col,high)

{

var k=new Array(row);

for (i = 0; i < k . length; ++ i)

{

k [i] = new Array (col);

for (j = 0; j < k[i] . length; ++ j)

k [i][j] = new Array (high);

}

return k;

}

Tested same as above 2D.

Have a good job!

2D array in JS.

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