How to implement Lodash's GroupBy Functionality From Scratch? | JavaScript Interview Questions

In this video we are going to implement Lodash's groupBy functionality from scratch. We are going to discuss how groupBy works, cover different cases, and test it against multiple inputs cases. This question tests the candidate on their thought process, how they approach the problem, handling of edge cases, and their problem solving skills. 00:00 Introduction 01:17 What are we building? 04:03 Basic Blueprint of GroupBy & Sanity Checks 06:20 Handling case where we have to groupby function output 10:51 Handling case where we have to groupby by traversing path 16:24 Handling Invalid Path Case 17:30 Running Test Cases 18:34 Lodash GroupBy vs Custom GroupBy Test Cases 19:36 Outro Solve Question here: https://www.devtools.tech/questions/s/implement-groupby-functionality---qid---RDj0FSzOBMyCIuZcgvJc?ref=devtools-yt-description-link https://devtools.tech/?ref=dtyt You can support our channel via: https://rzp.io/l/support-devtools-tech https://yomeshgupta.gumroad.com/l/code-devtools-support https://www.buymeacoffee.com/yomeshgupta ************************************************************** Devtools Tech is a YouTube channel which was started as a collaborative effort among like-minded engineers to provide high quality programming tutorials for free. We firmly believe in knowledge sharing and easy access to quality content for everyone. Hence, this channel is an effort to give back to the community and a step towards our belief -- "We rise by lifting others". Interview questions: https://devtools.tech/questions/all?ref=dtyt-ql Interview resources: https://devtools.tech/resources/all?ref=dtyt-rl Team Members: Yomesh Gupta Portfolio: https://yomeshgupta.com LinkedIn: https://www.linkedin.com/in/yomeshgupta/ Twitter: https://twitter.com/yomeshgupta Saloni Kathuria LinkedIn: https://www.linkedin.com/in/salonikathuria/ Twitter: https://twitter.com/saloni_kathuria Medium: https://medium.com/@kathuria.saloni2 Puneet Ahuja Portfolio: https://puneetahuja.in/ LinkedIn: https://www.linkedin.com/in/devpuneetahuja/ Twitter: https://twitter.com/punsahuja #javascript #autocomplete #reactjs #interview **************************************************************