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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