30-seconds-of-code/snippets/forEachRight.md

title, tags

title	tags
forEachRight	array,function,intermediate

Executes a provided function once for each array element, starting from the array's last element.

Use Array.prototype.slice(0) to clone the given array, Array.prototype.reverse() to reverse it and Array.prototype.forEach() to iterate over the reversed array.

const forEachRight = (arr, callback) =>
  arr
    .slice(0)
    .reverse()
    .forEach(callback);

forEachRight([1, 2, 3, 4], val => console.log(val)); // '4', '3', '2', '1'