Scala Reactive Programming

Advantages of flatMap

We can get the following benefits from the Scala flatMap() function:

• It avoids if...else blocks
• No nested for loops
• No callback hell
• We can write simple, elegant, readable, and neat code

The flatMap() function is defined, as shown here in all Scala Container classes:

final def flatMap[B](f: (A) ⇒ C[B]): C[B] 

Here, C is a Scala container class like List, Option, Try, Future, and so on.

The flatMap() function takes a function f as an argument. The function f is defined as f: A => C[B], meaning it takes element A as input, processes it, and outputs it as C[B].

Here, A and B are of the same type or may be different types. The following diagram shows how the Scala flatMap() function works internally:

Let us explore the ...