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

title, tags

title	tags
takeRightWhile	array,intermediate

Removes elements from the end of an array until the passed function returns true. Returns the removed elements.

• Loop through the array, using Array.prototype.reduceRight() and accumulating elements while func returns falsy values.

const takeRightWhile = (arr, func) =>
  arr.reduceRight((acc, el) => (func(el) ? acc : [el, ...acc]), []);

takeRightWhile([1, 2, 3, 4], n => n < 3); // [3, 4]