In Scala: Functional Programming

: In Scala, functions are first-class citizens. You can pass them as arguments to other functions (like map , filter , or flatmap ) or return them as values.

: Think of this as "switch statements on steroids." It allows you to deconstruct data structures like Case Classes or Options with type safety. Functional Programming in Scala

Functional Programming (FP) in Scala isn't just about using a different syntax—it’s about changing how you think about problems. By treating programs as a series of mathematical transformations rather than a sequence of changes to a shared state, you can write code that is more reliable, easier to test, and naturally thread-safe. 1. The Core Pillars of Scala FP : In Scala, functions are first-class citizens

: This means you can replace a function call with its resulting value without changing the program's behavior. This makes reasoning about complex code much simpler. 2. Powerful Scala Features for FP Functional Programming (FP) in Scala isn't just about

: A function is "pure" if it always returns the same output for the same input and has no side effects (like printing to a console or updating a database).

def buyCoffee(cc: CreditCard): Coffee = val cup = new Coffee() cc.charge(cup.price) // Side effect: hits the bank API immediately cup Use code with caution. Copied to clipboard Learning Functional Programming with Scala | by Ryan Susana

: Say goodbye to NullPointerException . The Option[T] container forces you to explicitly handle cases where a value might be missing ( Some(value) or None ). 3. Practical Example: From Impure to Pure