JavaScript: Remove elements from the end of an array until the passed function returns true

JavaScript fundamental (ES6 Syntax): Exercise-242 with Solution

Write a JavaScript program to remove elements from the end of an array until the passed function returns true. Returns the remaining elements of the array.

• Loop through the array, using Array.prototype.slice() to drop the last element of the array until the value returned from func is true.
• Return the remaining elements.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
const dropRightWhile = (arr, func) => {
  while (arr.length > 0 && !func(arr[arr.length - 1])) arr = arr.slice(0, -1);
  return arr;
};

console.log(dropRightWhile([1, 2, 3, 4], n => n < 3));

Sample Output:

[1,2]

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-242-1 by w3resource (@w3resource) on CodePen.

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