Question

I am creating a JSON array exactly as follows (bar using mathrandom).

For example purposes:

var numbers = [];
var jsonString = "";

function EveryOneSec() {
  numbers.push(Math.random());
  jsonString = JSON.stringify({'numbers': numbers});
  setTimeout(EveryOneSec, 1000);
}

When I create the JSON string it will obviously just keep getting bigger.

Is there a way that I can only have the 10 most recently added into the array?

Answer 1

Add the following code to the top of EveryOneSec

if (numbers.length == 10) {
    numbers.shift();
}

You want to use push and shift to ensure you always have the recent 10.