DEV Community

DPC
DPC

Posted on

2 2 4 3 4

Daily JavaScript Challenge #JS-123: Transform Array by Multiplying Even Indices and Subtracting Odd Indices

Daily JavaScript Challenge: Transform Array by Multiplying Even Indices and Subtracting Odd Indices

Hey fellow developers! 👋 Welcome to today's JavaScript coding challenge. Let's keep those programming skills sharp!

The Challenge

Difficulty: Easy

Topic: Array Manipulation

Description

Create a function that takes an array of integers and transforms it according to specific rules: multiply the elements at even indices by their index number, and subtract the index number from elements at odd indices.

Ready to Begin?

https://www.dpcdev.com/

  1. Fork this challenge
  2. Write your solution
  3. Test it against the provided test cases
  4. Share your approach in the comments below!

Want to Learn More?

Check out the documentation about this topic here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map

Join the Discussion!

  • How did you approach this problem?
  • Did you find any interesting edge cases?
  • What was your biggest learning from this challenge?

Let's learn together! Drop your thoughts and questions in the comments below. 👇


This is part of our Daily JavaScript Challenge series. Follow me for daily programming challenges and let's grow together! 🚀

javascript #programming #coding #dailycodingchallenge #webdev

Gen AI apps are built with MongoDB Atlas

Gen AI apps are built with MongoDB Atlas

MongoDB Atlas is the developer-friendly database for building, scaling, and running gen AI & LLM apps—no separate vector DB needed. Enjoy native vector search, 115+ regions, and flexible document modeling. Build AI faster, all in one place.

Start Free

Top comments (0)

Scale globally with MongoDB Atlas. Try free.

Scale globally with MongoDB Atlas. Try free.

MongoDB Atlas is the global, multi-cloud database for modern apps trusted by developers and enterprises to build, scale, and run cutting-edge applications, with automated scaling, built-in security, and 125+ cloud regions.

Learn More

👋 Kindness is contagious

Explore this practical breakdown on DEV’s open platform, where developers from every background come together to push boundaries. No matter your experience, your viewpoint enriches the conversation.

Dropping a simple “thank you” or question in the comments goes a long way in supporting authors—your feedback helps ideas evolve.

At DEV, shared discovery drives progress and builds lasting bonds. If this post resonated, a quick nod of appreciation can make all the difference.

Okay