var myStringArray = ["1","2","3","4","5","6","7","8","9","10"];

1
2
3

4
5
6

7
8
9

10
1
2

3
4
5

var myStringArray = ["1","2","3","4","5","6","7","8","9","10"];
var arrayLength = myStringArray.length;
for (var i = 0; i < arrayLength; i++) {
    if (i<(6)) {
       console.log(myStringArray[i]);
    }
}

function loopArray(arr, step=3) {
    let i = 0;
    return function inner() {
        for (let j = 0; j < step; j++) {
            console.log(arr[i]);
            i = (i + 1) % arr.length;
        }
    };
 }

const func = loopArray(["1","2","3","4","5","6","7","8","9","10"], 3);
func();
func();
func();
func();
func();

var get3items = (function () {

    var index = 0;
    var myStringArray = ["1","2","3","4","5","6","7","8","9","10"];
    var len = myStringArray.length

    return function () {
       for(var count = 0; count < 3; count += 1)
       {
           console.log(myStringArray[index]);

           if(index == (len - 1))
           {
                    index = 0;
           } else {
                    index += 1;
           }
       }
    }
})();

get3items (); // first call

console.log()
get3items (); // second call

console.log()
get3items (); // third call

console.log()
get3items (); // fourth call

console.log()
get3items (); // fifth call

/*
 1
 2
 3

 4
 5
 6

 7
 8
 9

 10
 1
 2

 3
 4
 5
*/

function* get3() {
  var myStringArray = ["1","2","3","4","5","6","7","8","9","10"];
  var index = 0;
  while (true) {
    yield [0, 1, 2].map(i => myStringArray[(index + i) % myStringArray.length])
    index = (index + 3) % myStringArray.length;
  }
}

var getter = get3();
console.log(getter.next().value); // ["1","2","3"]
console.log(getter.next().value); // ["4","5","6"]
console.log(getter.next().value); // ["7","8","9"]
// etc.

function* cycle(arr) {
    let i=0;
    while (true) {
        yield arr[i++];
        i %= arr.length;
    }
}
function* chunksOf(n, iterable) {
    let chunk = [];
    for (const x of iterable) {
        chunk.push(x)
        if (chunk.length >= n) {
            yield chunk;
            chunk = [];
        }
    }
    if (chunk.length > 0)
        yield chunk;
}
function toFunction(iterator) {
    return () => iterator.next().value;
}
var myStringArray = ["1","2","3","4","5","6","7","8","9","10"];

const f = toFunction(chunksOf(3, cycle(myStringArray)));
console.log(f());
console.log(f());
console.log(f());
// …

var myStringArray = ["1","2","3","4","5","6","7","8","9","10"];
var arrayLength = myStringArray.length;
var arrayPointer = 0;
for (var i = 0; i < 3; i++) {
    console.log(myStringArray[arrayPointer++]);
    arrayPointer %= arrayLength; // same as: arrayPointer = arrayPointer % arrayLength;
}

function* employeeNames(){
    var empList =  ["1","2","3","4","5","6","7","8","9","10"];

    for(var i =0; i<=empList.length; i++){
        yield empList[i];
    }
}

var emp;
emp = employeeNames();