frankiehayward
12/5/2019 - 10:21 PM

dropRightWhile

This snippet removes elements from the right side of an array until the passed function returns true.

drop_right_while.js
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const dropRightWhile = (arr, func) => {
  while (arr.length > 0 && !func(arr[arr.length - 1])) arr = arr.slice(0, -1);
  return arr;
};

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