Javascript array reading

Question

Im very much a javscript beginner and have gone through books and online forums such as this one but can't figure this out.

I have an array that is

var n=[1,1,1,1,5,5,5,5];

What the elements/numbers are are the number of times a ball wil bounce. so at n[0] to n[3] the ball will bounce once, and n[4] to n[7] it will bounce 5 times.

I want to write this logic, but am not sure how...

I started with

var x = n[];
n = 0;
while (x < 3, x++) {
    n = n[0];
    n[]++;
}
for (x = 3) {
    x++;
    n = 1;
    n[]++;
}
while (x > 3) {
    n = 5;
}

But I Know that this is incorrect. I am not sure how to proceed with this, could someone pelase help me?

Thank you!

could you add comments to the code so we can see your logic? — J Max
– J Max, Commented Jun 20, 2012 at 15:25
Maybe you should read again about the syntax of for and of while? — linepogl
– linepogl, Commented Jun 20, 2012 at 15:27

Mahmoud Gamal · Accepted Answer · 2012-06-20 15:44:30Z

2

It should be this way:

var x = [];
for(var i = 0; i < 8; i++)
   x[i] = i <= 3 ? 1 : 5;

Or, you can break it down the way you wrote to:

var x = [];
var i = 0;
while (i < 3) {
    x[i++] = 1;
}
for (i = 4; i < 8; i++)
    x[i] = 5;

You should read more about loop statements in javascript, and for the first way it is called ternary operator or conditional operator.

edited Jun 20, 2012 at 15:44

answered Jun 20, 2012 at 15:26

Mahmoud Gamal

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user1469702 Over a year ago

Thank you! (I've never responded or used stackoverflow so I'm now sure if I'm responding/replying correctly in a way thaty ou'll see this)

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