The document discusses the future of functional programming on iOS. It notes that functional programming concepts like closures, pure functions, immutable data and declarative code have been introduced to Apple platforms like Swift. While Swift has fallen short of fully embracing functional paradigms, the community is driving development of functional programming in Swift by sharing knowledge through books, blogs, open source projects and more. The conclusion encourages developers to learn from both the successes and failures of the past to continue advancing functional programming and building better applications.

1. the f&t&re of
functional programming
on iOS
Ash Furrow, Artsy

3. Objective-C

4. Closures
Functional patterns
Concise syntax
Native Collections
Operator overloading
Namespaces Tuples
Clear mutability syntax
Interactive playground Multiple return types
Generics
Protocols and extensions on structs
Pattern matching
Fast iteration
Optional types
Object orientation
Type inference
Read-Eval-Print-Loop (REPL)
Compile to native code

5. Closures
Functional patterns
Concise syntax
Native Collections
Operator overloading
Namespaces Tuples
Clear mutability syntax
Interactive playground Multiple return types
Generics
Protocols and extensions on structs
Pattern matching
Fast iteration
Optional types
Object orientation
Type inference
Read-Eval-Print-Loop (REPL)
Compile to native code

6. Closures
Functional patterns
Concise syntax
Native Collections
Operator overloading
Namespaces Tuples
Clear mutability syntax
Interactive playground Multiple return types
Generics
Protocols and extensions on structs
Pattern matching
Fast iteration
Optional types
Object orientation
Type inference
Read-Eval-Print-Loop (REPL)
Compile to native code

7. Objective-C

9. It will not be we make apps for the WATCH 5
and the other future iOS devices.
It will be a group of developers very much like us.
But with more of our strengths and fewer of our weaknesses.
More confident, far-seeing,
and capable of using functional paradigms.
For all of our failings, despite our limitations and fallibilities,
we developers are capable of greatness.
—Carl Sagan

10. 1. Imperative prog5amming is old and busted
2. Functional prog5amming is the new ho?@ess
3. Ge?ing starCed with f&nctional prog5amming in Swiſt is super-­‐easy

11. old
and
busted

12. ANDA MASK ;AND A with Mask
BNE ADD1
BRA NONE1
ADD1 INY ;increment our counter of 1's
NONE1 LDAA TEMP ;reload accumulator A
LSL MASK ;Shift the mask's 1 bit left
BNE LOOP1 ;If we haven't finished our loop, branch
LDAA #$01 ;load new mask into A
STAA MASK ;store the reset mask into MASK
TSX ;pull of return address and store in X
PULA ;pull off A
STAA TEMP ;store the value into temp
TXS ;push return address back onto the stack
LOOP2 LDAA TEMP ;Load A into TEMP
ANDA MASK ;logical AND MASK with A
BNE ADD2 ;add one if we need to
BRA NONE2
ADD2 INY ;increment our counter of 1's
NONE2 LDAA TEMP
LSL MASK ;shift our mask left by one
BNE LOOP2 ;loop back until we've exhausted positions

13. new
hottness

14. functional programming
• It’s been around forever
• But only in universities (ew)

15. what is functional programming?
• Treat computation as the result of functions
• Avoid mutable state and data

16. f&nctional prog5amming tells the computer
instead of
what to do
how to do it

17. getting started
is
super-easy

18. code let’s

19. github.com/ashfurrow/minsk

20. resources
• Books
• Blogs
• GitHub
• ReactiveCocoa
• LlamaKit
• Stack Overflow
• Tweet me

21. objc.io/books

22. github.com/artsy/eidolon

23. 1. Imperative prog5amming is old and busted
2. Functional prog5amming is the new ho?@ess
3. Ge?ing starCed with f&nctional prog5amming in Swiſt is super-­‐easy

24. so where now?
• Swift promised functional patterns
• Failed to deliver
• Community is picking up the slack

25. make
better mistakes
tomorrow

26. thanks
@ashfurrow