Kt. Academy

Introduction to functional programming with Kotlin

Why do we need to use functions as objects?

Anonymous functions

Lambda expressions

Exercise: Function types and literals

Exercise: Observable value

Function references

Exercise: Inferred function types

Exercise: Function references

SAM Interface support in Kotlin

Inline functions

Exercise: Inline functions

Collection processing

Exercise: Implement map

Exercise: Optimize collection processing

withIndex and indexed variants

take, takeLast, drop, dropLast and subList

Exercise: Adding element at position

Getting elements at certain positions

Exercise: Implement shop functions

Associating to a map

Exercise: Prime access list

Sorting: sorted, sortedBy and sortedWith

Exercise: Top articles

Exercise: Refactor collection processing

zip and zipWithNext

Exercise: Passing students list

Exercise: Best students list

Exercise: Functional Quick Sort

Exercise: Powerset

Exercise: All possible partitions of a set

Exercise: Understanding sequences

Type Safe DSL Builders

Exercise: HTML table DSL

Exercise: Creating user table row

Scope functions

Exercise: Using scope functions

Exercise: orThrow

Context receivers

Exercise: Logger

A birds-eye view of Arrow

Functions and Arrow Core

Data Immutability with Arrow Optics