Working with Arrays

[say]

Hi, I've some problem with arrays and hope someone here could help.

I have a dynamically generated array below:

var ar = new Array( );
ar[4] = new Array( );
ar[4][0] = new Option( "Main Disk", "0" );
ar[4][1] = new Option( "Root folder", "1" );
ar[4][2] = new Option( "Inside Root Folder", "3" );
ar[4][3] = new Option( "inside Inside Root", "4" );

For example, when I choose "Inside Root Folder", I need to loop thru the above array from the start and ends after it meets "Inside Root Folder".

My problem is, I need to first know what ar[x] will contain during dynamic (in this case, its 4). if not, I've no idea how to loop it. Anyone know a way to solve this?

Thanks in advanced.

[rushiku]

not quite sure what you're asking...

I'll assume you have something like:

for( var i = 0; i < 4; ++i )...?

change it to:

for( var i = 0; i < ar[4].length; ++i )...

to loop through the elements of the 5th element of the ar array.

[say]

Hi rushiku, thanks for the reply. Yes, this works of course, but during runtime, the array is dynamically generated by backend script and ar[] can be some other numbers. That is the problem where I need to somehow get the numeric value of ar so as I can loop thru it.

[say]

sorry if I didn't explain it well.

here is the starting of my loop

for( i=0; i<ar.length; i++ )
    {   	   
		if( ar[i][i].value == dir )
		{

This gives me an error on ar.length is null. But the reason I do that is because I don't know what the numeric value will be when the script runs as it is dynamic.

[MikeFoster]

I agree with rushiku, we don't yet have enough information about what you're doing. Is the page online?

For looping thru the entire 'ar' array, try this:

var row, col;
for (row = 0; row < ar.length; ++row) {
  for (col = 0; ar[row] && col < ar[row].length; ++col) {
    alert(ar[row][col]);
  }
}

[say]

I agree with rushiku, we don't yet have enough information about what you're doing. Is the page online?

For looping thru the entire 'ar' array, try this:

var row, col;
for (row = 0; row < ar.length; ++row) {
  for (col = 0; ar[row] && col < ar[row].length; ++col) {
    alert(ar[row][col]);
  }
}

hehe, sorry. yeah, I know, I can't agree more that I didn't explain it well. Javacript is just driving me crazy. Thanks for the help rushiku and mike. I got it work out with a little will power.