Is it possible to have content in an array with a length of 0?

Here is the test code that I am using:

console.log('AA',slider);
console.log('AB',slider.length);

When I check the Chrome console, it shows the following results.

AA Array[53]
AB 0

I included this test code because even though there seems to be a value present, slider[5] always returns as undefined.

Here is a basic version of the initialization script. The complete code is lengthy and Slider is an object being used. This code sets up the Slider object and later on, further manipulation is done based on data retrieved via AJAX.

var slider=[];
for (var uid=1;uid<50;uid++) {
    slider[uid]=new Slider(.........);
}

var slider={};
for (var uid=1;uid<50;uid++) {
    slider[uid]=new Slider(.........);
}

This then outputs AA { 1:{m a: ...., b: ...., c: ...., g: ...., h: .... }, 2: .....

It goes through this process all the way up to number 49

Answer №1

After troubleshooting, I have identified the issue and hope that this solution will be helpful to others.

Upon reviewing the code, here is a more optimized example of initialization:

var slider=[];
setInterval(function(){
    for (var uid=1;uid<50;uid++) {
        slider[uid]=new Slider(.........);
    }
},500);
console.log('AA',slider);
console.log('AB',slider.length);

At the time the console log commands are executed, the array appears empty. However, it seems that the first line logs a reference to the object rather than its current state. Therefore, when checking the log after half a second, data appears to be present.

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