How would you manually code the Array.prototype methods like flat, map, reduce, and concat in JavaScript?

Very hard Difficulty

Very-hard questions are the ultimate test of your expertise and preparation. They demand not just knowledge, but creativity and strategic thinking, often addressing unique or highly technical aspects of your field.

Javascript question

JavaScript questions test your proficiency with this versatile programming language. Demonstrate your understanding of language fundamentals, asynchronous programming, frameworks, and how you build dynamic web applications.

Here's a Hint

Demonstrate understanding of both the functionality and implementation details of each method, focusing on handling edge cases properly.