Available from Gumroad
There's nothing natural about Functional Programming.
It's awkward, it feels funny, there's something not right about it ... and then one day you start to see the world differently and you can't remember what was so difficult.
This hand-on, fast-moving kickstart will provide you with a new set of skills that you can add to - not replace - your current favorite programming techniques.
Updated for Xcode 12 and Swift 5.3 and tested on Apple Silicon.
Chapter 1: Magic
The Trick
A Card
The Mutating Card
The Non-Mutating Card
Changing a Card
Destroy and Restore a Card
The Deck
Performing the Trick
Road Map
Credits, Bio, and Version History
Chapter 2: Functions aren't special
Pure Functions
Trick Deck
A Simple Label
A Simple Button
Mutating State
Displaying Cards
Mutable Middle
One for Fun
Chapter 3: Higher-Order Functions
Lines
Making Functions
Closures
Making Closures
Consuming Closures
Generics
Call as Function
Custom Operators
Flexible Trick
Chapter 4: Arrays
Filter
Sorted
Map
CompactMap
FlatMap
Reduce
Zip
Playing with a Full Deck
Chapter 5: Map
The Magic of Map
One at a Time
Zero or One
Optionals
Result
Writer
The Map Pattern
The Magic of Map Revealed
Chapter 6: FlatMap
The Magic of FlatMap
Writer
Shiny Trunk
Result
Optionals
The shape of map and flatMap
Just
Monoids
Chapter 7: Apply
The Magic of Apply
Arrays
The Interchange Law
Currying
Optionals
Between Functor and Monad
Result
Validated
Chapter 8: Deeper Magic
String Function
Reader
The Reader Monad
Parsers
State
The State Monad
So...
Training from Dim Sum Thinking
