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To avoid this, add a question mark at the end of each item being accessed. This tells Javascript to use optional chaining. When using optional chaining, if the object being accessed is undefined, the entire operation short circuits and evaluates to undefined. // Safe property access with opt...
2. Write a function that takes an array of objects and a key, and returns a new array sorted based on the values of that key in ascending order. By asking this question, hiring managers analyze how well the candidate can discuss the sorting algorithm and its time complexity. It’s also...
Pure functions only depend on their arguments, thus making unit testing them much simpler. Take a look at this interview. The question was to partially apply an add function. The candidate started each step of the solution with writing unit tests! This is the best demonstration of...
The goal of this series will be to delve into the concepts and theories that make up JavaScript. The topics will come from Darcy Clarke’s awesome list of typical JSinterview questions. Hopefully, you will finish the article with more than just an answer to the question. Each article will ...
feat: added nodejs module on the topics and shared some basic question asked in interview #10267 Merged bregman-arie merged 2 commits into bregman-arie:master from arnabbis:feat/add-node-module-question May 10, 2024 +37 −0 Conversation 0 Commits 2 Checks 0 Files changed 4 ...
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There is no correct answer to the question as the use case determines which language you should use. It also depends on how proficient you are with a particular programming language. Q. What is the averagesalary of back-end developers?