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What is immutability in JavaScript and why is it important?

Asked on Wednesday, Jul 30, 2025

Immutability in JavaScript refers to the concept where data structures cannot be altered after they are created. This is important for ensuring predictable code behavior, especially in functional prog…

What is functional programming in JavaScript?

Asked on Tuesday, Jul 29, 2025

Functional programming in JavaScript is a programming paradigm that treats computation as the evaluation of mathematical functions and avoids changing state or mutable data. It emphasizes the use of p…

What are pure functions in JavaScript?

Asked on Monday, Jul 28, 2025

Pure functions in JavaScript are functions that, given the same input, will always return the same output and do not produce any side effects. They are predictable and easier to test. function add(a, …

What is the difference between shallow copy and deep copy in JavaScript?

Asked on Sunday, Jul 27, 2025

In JavaScript, a shallow copy duplicates the top-level properties of an object, while a deep copy duplicates all nested objects, creating independent copies. Here's how you can create each type of cop…