Question

I have this piece of code, when you look at it it would seem that the logic should run as follows:

I create 3 empty arrays, I add one value to bankSelectedData, I print out the values, obviously bankSelectedData is now 1 and bankSelectionArrayCurrent length is 0, but then I say:

bankSelectionArrayPrevious = bankSelectionArrayCurrent;

So I’m turning bankSelectionArrayPrevious into bankSelectionArrayCurrent. When I check the size of bankSelectionArrayPrevious is says ‘1’ ?? How is this possible?

var bankSelectionArrayCurrent = new Array();
var bankSelectionArrayPrevious = new Array();
var bankSelectedData = new Array();
    bankSelectedData.push("value1");

alert("bankSelectionArrayCurrent length: "+bankSelectionArrayCurrent.length);
alert("bankSelectedData length: "+bankSelectedData.length);

if(bankSelectedData.length != bankSelectionArrayCurrent.length){
    bankSelectionArrayPrevious = bankSelectionArrayCurrent;
    bankSelectionArrayCurrent.length = 0

    alert("previousSize: "+bankSelectedData.length);
    alert("currentSize: "+bankSelectionArrayCurrent.length);
}​

Thanks for any advice!

Answer 1

Where you have

alert("previousSize: "+bankSelectedData.length);

perhaps you meant:

alert("previousSize: "+bankSelectionArrayPrevious.length);