Functional Kotlin (The Course)
$25.00
Minimum price
$35.00
Suggested price

This Course is part of the following Tracks:

Course Material

  • Notes about the course
  • Project with exercises
  • icon/quiz Created with Sketch.
    Quiz 13 attempts allowed
  • Introduction to functional programming with Kotlin
  • Why do we need to use functions as objects?
  • Function types
  • Defining function types
  • Using function types
  • Named parameters
  • Type aliases
  • A function type is an interface
  • icon/quiz Created with Sketch.
    Quiz 23 attempts allowed
  • Anonymous functions
  • icon/quiz Created with Sketch.
    Quiz 33 attempts allowed
  • Lambda expressions
  • Tricky braces
  • Parameters
  • Trailing lambdas
  • Result values
  • Lambda expression examples
  • An implicit name for a single parameter
  • Closures
  • Lambda expressions vs anonymous functions
  • icon/quiz Created with Sketch.
    Quiz 43 attempts allowed
  • Exercise: Function types and literals
  • icon/quiz Created with Sketch.
    Quiz 5100 attempts allowed
  • Exercise: Observable value
  • icon/quiz Created with Sketch.
    Quiz 6100 attempts allowed
  • Function references
  • Top-level functions references
  • Method references
  • Extension function references
  • Method references and generic types
  • Bounded function references
  • Constructor references
  • Bounded object declaration references
  • Function overloading and references
  • Property references
  • icon/quiz Created with Sketch.
    Quiz 73 attempts allowed
  • Exercise: Inferred function types
  • icon/quiz Created with Sketch.
    Quiz 8100 attempts allowed
  • Exercise: Function references
  • icon/quiz Created with Sketch.
    Quiz 9100 attempts allowed
  • SAM Interface support in Kotlin
  • Support for Java SAM interfaces in Kotlin
  • Functional interfaces
  • icon/quiz Created with Sketch.
    Quiz 103 attempts allowed
  • Inline functions
  • Inline functions
  • Inline functions with functional parameters
  • Non-local return
  • Crossinline and noinline
  • Reified type parameters
  • Inline properties
  • Costs of the inline modifier
  • Using inline functions
  • icon/quiz Created with Sketch.
    Quiz 113 attempts allowed
  • Exercise: Inline functions
  • icon/quiz Created with Sketch.
    Quiz 12100 attempts allowed
  • Collection processing
  • forEach and onEach
  • filter
  • map
  • mapNotNull
  • flatMap
  • icon/quiz Created with Sketch.
    Quiz 133 attempts allowed
  • Exercise: Implement map
  • icon/quiz Created with Sketch.
    Quiz 14100 attempts allowed
  • Exercise: Optimize collection processing
  • icon/quiz Created with Sketch.
    Quiz 15100 attempts allowed
  • fold
  • fold
  • reduce
  • sum
  • icon/quiz Created with Sketch.
    Quiz 163 attempts allowed
  • withIndex and indexed variants
  • withIndex and indexed variants
  • icon/quiz Created with Sketch.
    Quiz 173 attempts allowed
  • take, takeLast, drop, dropLast and subList
  • take, takeLast, drop, dropLast and subList
  • icon/quiz Created with Sketch.
    Quiz 183 attempts allowed
  • Exercise: Adding element at position
  • icon/quiz Created with Sketch.
    Quiz 19100 attempts allowed
  • Getting elements at certain positions
  • Getting elements at certain positions
  • Finding an element
  • Counting elements
  • any, all and none
  • icon/quiz Created with Sketch.
    Quiz 203 attempts allowed
  • Exercise: Implement shop functions
  • icon/quiz Created with Sketch.
    Quiz 21100 attempts allowed
  • partition
  • partition
  • groupBy
  • icon/quiz Created with Sketch.
    Quiz 223 attempts allowed
  • Associating to a map
  • Associating to a map
  • distinct and distinctBy
  • icon/quiz Created with Sketch.
    Quiz 233 attempts allowed
  • Exercise: Prime access list
  • icon/quiz Created with Sketch.
    Quiz 24100 attempts allowed
  • Sorting: sorted, sortedBy and sortedWith
  • Sorting: sorted, sortedBy and sortedWith
  • Sorting mutable collections
  • Maximum and minimum
  • shuffled and random
  • icon/quiz Created with Sketch.
    Quiz 253 attempts allowed
  • Exercise: Top articles
  • icon/quiz Created with Sketch.
    Quiz 26100 attempts allowed
  • Exercise: Refactor collection processing
  • icon/quiz Created with Sketch.
    Quiz 27100 attempts allowed
  • zip and zipWithNext
  • zip and zipWithNext
  • Windowing
  • icon/quiz Created with Sketch.
    Quiz 283 attempts allowed
  • joinToString
  • joinToString
  • Map, Set and String processing
  • icon/quiz Created with Sketch.
    Quiz 293 attempts allowed
  • Exercise: Passing students list
  • icon/quiz Created with Sketch.
    Quiz 30100 attempts allowed
  • Exercise: Best students list
  • icon/quiz Created with Sketch.
    Quiz 31100 attempts allowed
  • Exercise: Functional Quick Sort
  • icon/quiz Created with Sketch.
    Quiz 32100 attempts allowed
  • Exercise: Powerset
  • icon/quiz Created with Sketch.
    Quiz 33100 attempts allowed
  • Exercise: All possible partitions of a set
  • icon/quiz Created with Sketch.
    Quiz 34100 attempts allowed
  • Sequences
  • What is a sequence?
  • Order is important
  • Sequences do the minimum number of operations
  • Sequences can be infinite
  • Sequences do not create collections at every processing step
  • When aren’t sequences faster?
  • What about Java streams?
  • Kotlin Sequence debugging
  • Summary
  • icon/quiz Created with Sketch.
    Quiz 353 attempts allowed
  • Exercise: Understanding sequences
  • icon/quiz Created with Sketch.
    Quiz 36100 attempts allowed
  • Type Safe DSL Builders
  • A function type with a receiver
  • Simple DSL builders
  • Using apply
  • Simple DSL-like builders
  • Multi-level DSLs
  • DslMarker
  • A more complex example
  • When should we use DSLs?
  • Summary
  • icon/quiz Created with Sketch.
    Quiz 373 attempts allowed
  • Exercise: HTML table DSL
  • icon/quiz Created with Sketch.
    Quiz 38100 attempts allowed
  • Exercise: Creating user table row
  • icon/quiz Created with Sketch.
    Quiz 39100 attempts allowed
  • Scope functions
  • let
  • Mapping a single object
  • The problem with member extension functions
  • Moving an operation to the end of processing
  • Dealing with nullability
  • also
  • takeIf and takeUnless
  • apply
  • The dangers of careless receiver overloading
  • with
  • run
  • Using scope functions
  • icon/quiz Created with Sketch.
    Quiz 403 attempts allowed
  • Exercise: Using scope functions
  • icon/quiz Created with Sketch.
    Quiz 41100 attempts allowed
  • Exercise: orThrow
  • icon/quiz Created with Sketch.
    Quiz 42100 attempts allowed
  • Context receivers
  • Extension function problems
  • Introducing context receivers
  • Use cases
  • Classes with context receivers
  • Concerns
  • Summary
  • icon/quiz Created with Sketch.
    Quiz 433 attempts allowed
  • Exercise: Logger
  • icon/quiz Created with Sketch.
    Quiz 44100 attempts allowed
  • A birds-eye view of Arrow
  • Functions and Arrow Core
  • Functions and Arrow Core
  • Memoization
  • Testing higher-order functions
  • Error Handling
  • Error Handling
  • Working with nullable types
  • Working with Result
  • Working with Either
  • Data Immutability with Arrow Optics
  • Data Immutability with Arrow Optics
  • Exercise solutions

Instructors

    • Marcin Moskala is an experienced developer and Kotlin trainer. He is the founder of the Kt. Academy, Kotlin GDE, an official JetBrains partner for teaching Kotlin, and author of the books Effective Kotlin, Kotlin Coroutines, and Android Development with Kotlin.

The Leanpub 60 Day 100% Happiness Guarantee

Within 60 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.

Now, this is technically risky for us, since you'll have the book or course files either way. But we're so confident in our products and services, and in our authors and readers, that we're happy to offer a full money back guarantee for everything we sell.

You can only find out how good something is by trying it, and because of our 100% money back guarantee there's literally no risk to do so!

So, there's no reason not to click the Add to Cart button, is there?

See full terms...

Earn $8 on a $10 Purchase, and $16 on a $20 Purchase

We pay 80% royalties on purchases of $7.99 or more, and 80% royalties minus a 50 cent flat fee on purchases between $0.99 and $7.98. You earn $8 on a $10 sale, and $16 on a $20 sale. So, if we sell 5000 non-refunded copies of your book for $20, you'll earn $80,000.

(Yes, some authors have already earned much more than that on Leanpub.)

In fact, authors have earnedover $13 millionwriting, publishing and selling on Leanpub.

Learn more about writing on Leanpub

Free Updates. DRM Free.

If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).

Most Leanpub books are available in PDF (for computers) and EPUB (for phones, tablets and Kindle). The formats that a book includes are shown at the top right corner of this page.

Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.

Learn more about Leanpub's ebook formats and where to read them

Write and Publish on Leanpub

You can use Leanpub to easily write, publish and sell in-progress and completed ebooks and online courses!

Leanpub is a powerful platform for serious authors, combining a simple, elegant writing and publishing workflow with a store focused on selling in-progress ebooks.

Leanpub is a magical typewriter for authors: just write in plain text, and to publish your ebook, just click a button. (Or, if you are producing your ebook your own way, you can even upload your own PDF and/or EPUB files and then publish with one click!) It really is that easy.

Learn more about writing on Leanpub