the$f&t&re$of Ash Furrow functional programming on$iOS

Objective-C

Objective- C

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

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

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

Objective-C

Objective- C

Objective-C

No content

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

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$is$superEeasy

old and busted

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

new hottness

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

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

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

getting started is super-fácil* *ed:$Spanish

code let’s

github.com/ashfurrow/nsspain2014 [~]

resources • Books • GitHub • ReactiveCocoa • swiftz • Stack Overflow • Tweet me

objc.io/books

github.com/artsy/eidolon

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$is$superEeasy

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

make better mistakes tomorrow

gracias @ashfurrow