Question

i have a javascript array like this:

 array = [
  {"Command": "SetDuration","QuestionId": "2","NewDuration": "1"},
  {"Command": "SetDuration","QuestionId": "2","NewDuration": "1"},
  {"Command": "SetDuration","QuestionId": "7","NewDuration": "7"},
  {"Command": "SetDuration","QuestionId": "6","NewDuration": "7"}
 ]

my task is loop through it 1 time in a minute, starting at incremented index each time, so that after 3 minutes i would start from array[4]
How to accomplish this?
Thanks!

Answer 1

The magic of closures:

function createDwindlingLooper(arr) {
    var n = 0;
    return function() {
        for (var i = n; i < arr.length; i++) {
            console.log(i); // do real stuff here
        }
        n += 1; 
    }
}

var looper = createDwindlingLooper(array);

You can meet your timer requirement with this:

setInterval(createDwindlingLooper(array), 1000 * 60);

The value of n will be incremented by one each time looper is executed, achieving the desired effect:

var looper = createDwindlingLooper(array);
looper(); // 0, 1, 2, 3
looper(); // 1, 2, 3
looper(); // 2, 3
looper(); // 3
looper(); //