Answer
Consider the table ['one', 'two', 'four', 'three'] and we want to organize the last two elements.
/**
* move element one place to other in existing array
* @param {any[]} arr: array Value
* @param {number} from: index of value that need to be moved
* @param {number} to: index where need to be placed
*/
export const shiftInsert = (arr: any[], from: number, to: number) => {
const cutOut = arr.splice(from, 1)[0]; // cut the element at index 'from'
arr.splice(to, 0, cutOut); // insert it at index 'to'
};
Example
const data = ['one', 'two', 'four', 'three'];
shiftAndInsert(data, 3, 2);
console.log(data);
// output: ['one', 'two', 'three', 'four']
