w3resource

JavaScript: Create a function that gets the argument at index n. If n is negative, the nth argument from the end is returned

JavaScript fundamental (ES6 Syntax): Exercise-92 with Solution

Write a JavaScript program to create a function that gets the argument at index n. If n is negative, the nth argument from the end is returned.

  • Use Array.prototype.slice() to get the desired argument at index n.
  • If n is negative, the nth argument from the end is returned.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
const nthArg = n => (...args) => args.slice(n)[0];
const third = nthArg(2);
third(1, 2, 3); // 3
third(1, 2); // undefined
const last = nthArg(-1);
console.log(last(1, 2, 3, 4, 5));

Sample Output:

5

Flowchart:

flowchart: Create a function that gets the argument at index n

Live Demo:

See the Pen javascript-basic-exercise-92-1 by w3resource (@w3resource) on CodePen.


Improve this sample solution and post your code through Disqus

Previous: Write a JavaScript program that will return true if the provided predicate function returns false for all elements in a collection, false otherwise.
Next: Write a JavaScript program to remove an event listener from an element.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Follow us on Facebook and Twitter for latest update.