Array bug?

Classic Servoy
1

Hi all,

If I fill an array in this way:

	for(var i=1;i<=7;i++)
		_myArray[i] = i;

And I check the “.length”,I obtain 8 but the elements are 7!

if,instead,I create the array with the code:

var _myArray = new Array(1,2,3,4,5,6,7)

Then the “.length” returns the right number(7).

Maybe something wrong with the array index that start from 1 and end with 7? Or I’m forgotten something?
Here a sample:
[attachment=0]test_array_length.servoy[/attachment]

2

You are right. The problem is the index. JavaScript Arrays always start at index 0.
E.g.:

var myArray = [1,2,3,4];  // myArray.length is 4, indexes range from 0 to 3.
myArray[8] = 8;          // myArray.length is now 9, myArray[4]..myArray[7] are undefined

Regards

3

Thanks for your answer Birgit! :)

So because this is a JavaScript’s behavior ,we have to take it as it is,right?

I’m using other count logic (a simple “for in”), I’m asking it just for knowledge

4

Array behaviour is different in almost every language. An interesting link showing this is:

Regards