How to remove element using splice?

Question

I am not able to pass this test.

The result is undefined .

How do I solve the problem?

Code:

mocha.setup('bdd');
var expect = chai.expect;

function removeEnd(arr, n) {
/*
    write a program remove n element last of an array
*/
var removedItems= arr.splice(arr.length-n, n);

}

console.log(removeEnd([2, 3, 1, 8, 9, 7], 3));

describe('removeEnd', () => {
  it('Remove n elements from the endof an given array', () => {
    expect(removeEnd([2, 3, 1, 8, 9, 7], 3)).to.eql([2, 3, 1]);
  });
});

mocha.run();

Answer 1

You need to use slice() , not splice() :

function removeEnd(arr, n) {
    return arr.slice(0, arr.length - n);
}