What is Lodash? — JS Technical Interview Questions & Answers

A utility library for arrays, objects and functions.

What is Lodash?

  • Lodash (intro) is a JS topic. In plain words you use it for let total = 0 in a cart script. Don’t start with a slogan — start with that picture.
  • Smallest example: let for change, const for fixed. Type it, run it, and say what you see. If you can do that from memory, you know Lodash (intro).
  • From the example next to this theory: A utility library for arrays, objects and functions.
  • Trap: var leak / const reassign. Fix that before you talk about advanced JS.
  • Viva: what is Lodash (intro)? Then show let for change, const for fixed. Then name the trap.

Technical Interview Tip: What is Lodash (intro)? Show this: let for change, const for fixed. Trap: var leak / const reassign.

Code Examples for What is Lodash?

What is Lodash? — working example

// Topic: What is Lodash?
const nums = [1, 2, 3];
const doubled = nums.map((n) => n * 2);
console.log(doubled);
console.log(doubled.reduce((a, b) => a + b, 0));

What is Lodash?: map then reduce on [1, 2, 3]. Say both prints.

How to Explain What is Lodash? to an Interviewer

What is Lodash (intro)?

Used for let total = 0 a cart script Not just the heading

Give one small example of Lodash (intro).

let for change, const for fixed A utility library for arrays, objects and functions

What mistake do beginners make with Lodash (intro)?

var leak / const reassign Show the fix

Where do you use Lodash (intro)?

a cart script let total = 0