getting the .length of a global array

[Bloody_Lemming]

I'm trying to retrieve the length of a global array (one i constructed in Docunebnt JavaScriots).

event.value = gTable.length;

It returns a value of 0. I've tried it with a loval array, and it works just fine. I'm able to access objects in the array, but for some reason I can't get it's length...

[Bernd Alheit]

Try this:

Execute

gTable.length;

in the Javascript console.

What does you get?

[Bloody_Lemming · Accepted solution]

I get 0.

There are 4 entries in the array. I'm using the same method for creating my array as I did before, which JS handles like a standard object, or so I've read. It's an associative array with names indexes. Might this be the issue?

var gTable = new Array;
gTable[' '] = ' -- -- -- ';
gTable['Item 1'] = 'Item 1--1H--25--3';
gTable['Item 2'] = 'Item 2--2H--17--4';
gTable['Item 3'] = 'Item 3--1H--9--7';

[Bernd Alheit]

You can get the number of entries with:

Object.keys(gTable).length;

[try67]

That won't work in earlier versions of Acrobat or Reader, though.

[Bloody_Lemming]

That worked. Not teribly concerne with older versions. I will have to add that check, I suppose, just in case...

[try67]

Or just use the code I provided, which works in all circumstances...

[try67]

How did you declare this array? How are you accessing values within it?

[Bloody_Lemming]

I've posted above how I construct the array.

I'm using 'gTable[event.changeEx].split('--')[0]' to access the valuse in the array.

[try67]

OK, that's what I suspected... This is not an array. It's a literal object. Arrays don't have names for the items in them, and literal objects don't have a "length" property. If you want count how many items are in your object you can do it like this:

var counter = 0; for (var i in gTable) counter++; app.alert("Number of items in gTable: " + counter);

[Bloody_Lemming]

This is working, so I'm trying to confirm the entries. Not sure why it's not working...

// get the number of entries in the table
var itemNum = 0;
for (var i in gTable) itemNum++;

// list the items in the table
var i = 0;
while (i <= itemNum) {
console.println(gTable[i].split("--")[0])
i ++;
}

[try67]

Because the items in the literal object have to be accessed by name (or an iterator), not a number. This is NOT AN ARRAY!

[Bloody_Lemming]

Crap, right... Can't have it both ways...