JavaScript: Filter out the specified values from a specified array

JavaScript fundamental (ES6 Syntax): Exercise-8 with Solution

Write a JavaScript program to filter out the specified values from a specified array. Return the original array without the filtered values.

  • Use Array.prototype.filter() and Array.prototype.includes() to pull out the values that are not needed.
  • Set Array.prototype.length to mutate the passed in an array by resetting its length to 0.
  • Use Array.prototype.push() to re-populate it with only the pulled values.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
 const pull = (arr, ...args) => {
  let argState = Array.isArray(args[0]) ? args[0] : args;
  let pulled = arr.filter((v, i) => !argState.includes(v));
  arr.length = 0;
  pulled.forEach(v => arr.push(v));
  return pulled;
let arra1 = ['a', 'b', 'c', 'a', 'b', 'c'];
console.log(pull(arra1, 'a', 'c'));
let arra2 =  ['a', 'b', 'c', 'a', 'b', 'c'];
console.log(pull(arra2, 'b'));

Sample Output:


Pictorial Presentation:

JavaScript Fundamental: Filter out the specified values from a specified array


flowchart: Filter out the specified values from a specifed array

Live Demo:

See the Pen javascript-basic-exercise-1-8 by w3resource (@w3resource) on CodePen.

Improve this sample solution and post your code through Disqus

Previous: Write a JavaScript program to converts a specified number to an array of digits.
Next: Write a JavaScript program to combine the numbers of a given array into an array containing all combinations.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.

JavaScript: Tips of the Day

How to remove a specific item from an array?

Find the index of the array element you want to remove using indexOf, and then remove that index with splice.

The splice() method changes the contents of an array by removing existing elements and/or adding new elements.

const array = [2, 5, 9];


const index = array.indexOf(5);
if (index > -1) {
  array.splice(index, 1);

// array = [2, 9]

The second parameter of splice is the number of elements to remove. Note that splice modifies the array in place and returns a new array containing the elements that have been removed.

For the reason of completeness, here are functions. The first function removes only a single occurrence (i.e. removing the first match of 5 from [2,5,9,1,5,8,5]), while the second function removes all occurrences:

function removeItemOnce(arr, value) {
  var index = arr.indexOf(value);
  if (index > -1) {
    arr.splice(index, 1);
  return arr;

function removeItemAll(arr, value) {
  var i = 0;
  while (i < arr.length) {
    if (arr[i] === value) {
      arr.splice(i, 1);
    } else {
  return arr;
console.log(removeItemOnce([2,5,9,1,5,8,5], 5))
console.log(removeItemAll([2,5,9,1,5,8,5], 5))

Ref: https://bit.ly/2N9nKRp