#12 - Pure vs Impure Functions in Tamil - (தமிழில்) | Modern JavaScript in Tamil

Learn about fundamental concepts of pure and impure functions in programming with practical examples in Tamil. We will learn about Variable hoisting using var, let, const and function hoisting using function declaration and function express with clear examples.


⭐ Pure Functions:
Pure functions are the building blocks of functional programming. A pure function always produces the same output given the same input and has no side effects. This predictability makes pure functions easier to test and debug. They don't rely on or modify any state outside their scope, ensuring that their behavior is consistent and reliable. We'll explore several examples of pure functions and discuss their benefits, such as improved code readability, easier maintenance, and better scalability.

⭐ Impure Functions:
On the other hand, impure functions can produce different outputs given the same inputs or may have side effects such as modifying a global variable, interacting with external systems (like databases or APIs), or performing I/O operations. While impure functions are often necessary for real-world applications, they can introduce complexity and unpredictability into your code. We'll look at common scenarios where impure functions are used and discuss strategies for managing their side effects to maintain code quality.

Comparison and Best Practices:
We'll also compare pure and impure functions in various contexts and provide tips on how to leverage the strengths of both. Understanding when to use pure functions and how to handle impure functions properly can greatly enhance your coding skills and lead to more robust software development practices.

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⏱ Time Stamps
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00:00 - Intro
06:54 - Pure functions example #1
09:57 - Another Pure function example
11:26 - ImPure Function
16:43 - What to learn next?
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#PureVsImpure #javascript #javascriptintamil