The code in this function rotates an array by a certain amount every time it is called. It starts at position 0, and increments the index by 1 for each call. It then uses the reduction operator to modify the target array to reflect the new position of the index.
function circularArrayRotation(a, k, queries) {
//Enter your code here
return queries.map(value => a.reduce((target, item, index) => {
let focus = (index + k) % a.length;
target[focus] = item;
return target;
}, [])[value]);
}