Interpreting Objective C

1. Interpreting Objective-C @timburks

2. ν “What’s new (nu)?” Interpreting Objective-C. © Tim Burks. March 4, 2014

3. c/λ “C over lambda.” Interpreting Objective-C. © Tim Burks. March 4, 2014

4. Usage Desire Craft Insight Interpreting Objective-C. © Tim Burks. March 4, 2014

5. Desire Interpreting Objective-C. © Tim Burks. March 4, 2014

6. Beliefs about Better Interpreting Objective-C. © Tim Burks. March 4, 2014

7. 1 In any resource-constrained environment, performance is everything. Interpreting Objective-C. © Tim Burks. March 4, 2014

8. 2 All environments of value are resource-constrained. Interpreting Objective-C. © Tim Burks. March 4, 2014

9. 3 Performance is device performance and developer performance. Interpreting Objective-C. © Tim Burks. March 4, 2014

10. 4 The number of developers required to create a system is its biggest weakness. Interpreting Objective-C. © Tim Burks. March 4, 2014

11. 5 Stability and productivity are a developer's top two priorities, in that order. Interpreting Objective-C. © Tim Burks. March 4, 2014

12. 6 • Simplicity allows speed. Speed increases opportunity. • Simplicity allows control. Control reduces risk. Interpreting Objective-C. © Tim Burks. March 4, 2014

13. 7 • The C platform has consistently offered the best run time/power/capability performance for developers. • Lisp-style languages have offered the greatest capabilities of abstraction. Interpreting Objective-C. © Tim Burks. March 4, 2014

14. Insight Interpreting Objective-C. © Tim Burks. March 4, 2014

15. Observation Objective-C solves many problems in bridging C with high level languages. • Introspectable: no glue code is needed to bind to compiled objects. • Dynamic: we can add to the Objective-C runtime at run time. Interpreting Objective-C. © Tim Burks. March 4, 2014

16. So What’s Nu? • Nu is an interpreted dialect of Lisp that parses into Objective C objects that can be evaluated to perform computations. • Nu interacts directly with the Objective-C runtime to create and use classes, methods, and objects. Interpreting Objective-C. © Tim Burks. March 4, 2014

17. Craft Interpreting Objective-C. © Tim Burks. March 4, 2014

18. Parsing Nu (puts (+ 2 2))! NuCell NuCell puts Nu_puts_operator NuCell NuCell NuCell + 2 2 Nu_add_operator NSNumber NSNumber Interpreting Objective-C. © Tim Burks. March 4, 2014

19. Evaluating Nu - (id) evaluateWithContext:(NSMutableDictionary *) context NuCell NuCell puts Nu_puts_operator NuCell NuCell NuCell + 2 2 Nu_add_operator NSNumber NSNumber Interpreting Objective-C. © Tim Burks. March 4, 2014

20. Operators (+ 2 (/ 14 7)) ! ! Objects (UIStoryboard storyboardWithName:name bundle:nil) ! ! Interpreting Objective-C. © Tim Burks. March 4, 2014

21. Interacting with the Runtime ((UIView alloc) initWithFrame:’(0 0 100 100))! ! Nu evaluation can resolve symbols by looking up classes and methods in the Objective-C runtime. Nu evaluation uses Objective-C method signatures to make method calls with appropriately-typed arguments. Interpreting Objective-C. © Tim Burks. March 4, 2014

22. Interacting with the Runtime (class MyClass is NSObject ! (- hello is ! (puts “hello"))) The Nu class operator can be used to deﬁne new classes and to add methods to existing ones. Interpreting Objective-C. © Tim Burks. March 4, 2014

23. The Nu Shell % nush! Nu Shell.! % (class MyClass is NSObject ! (- hello is (puts "hello")))! ()! % (set myobject (MyClass new))! <MyClass:7fdb6863dd10>! % (myobject hello)! hello! ()! Interpreting Objective-C. © Tim Burks. March 4, 2014

24. Usage Interpreting Objective-C. © Tim Burks. March 4, 2014

25. Generate a plist ! (set me (dict name:"Tim Burks"! company:"Radtastical Inc."! address:(dict street:"220 South California Avenue, Suite 250"! city:"Palo Alto"! state:"CA"! zip:"94306")! projects:(array (dict name:"Silicon Valley iOS Developers' Meetup"! url:"http://meetup.com/sviphone")! (dict name:"Renaissance"! url:"http://renaissance.io")! (dict name:"Open Radar"! url:"http://openradar.io")! (dict name:"Nu"! url:"http://programming.nu"))))! ! ((me XMLPropertyListRepresentation) writeToFile:"tim.plist" atomically:NO)! Interpreting Objective-C. © Tim Burks. March 4, 2014

26. <?xml version="1.0" encoding="UTF-8"?>! <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">! <plist version="1.0">! <dict>! ! <key>address</key>! ! <dict>! ! ! <key>city</key>! ! ! <string>Palo Alto</string>! ! ! <key>state</key>! ! ! <string>CA</string>! ! ! <key>street</key>! ! ! <string>220 South California Avenue, Suite 250</string>! ! ! <key>zip</key>! ! ! <string>94306</string>! ! </dict>! ! <key>company</key>! ! <string>Radtastical Inc.</string>! ! <key>name</key>! ! <string>Tim Burks</string>! ! <key>projects</key>! ! <array>! ! ! <dict>! ! ! ! <key>name</key>! ! ! ! <string>Silicon Valley iOS Developers' Meetup</string>! ! ! ! <key>url</key>! ! ! ! <string>http://meetup.com/sviphone</string>! ! ! </dict>! ! ! <dict>! ! ! ! <key>name</key>! ! ! ! <string>Renaissance</string>! ! ! ! <key>url</key>! ! ! ! <string>http://renaissance.io</string>! ! ! </dict>! ! ! <dict>! ! ! ! <key>name</key>! ! ! ! <string>Open Radar</string>! ! ! ! <key>url</key>! ! ! ! <string>http://openradar.io</string>! ! ! </dict>! ! ! <dict>! ! ! ! <key>name</key>! ! ! ! <string>Nu</string>! ! ! ! <key>url</key>! ! ! ! <string>http://programming.nu</string>! ! ! </dict>! ! </array>! </dict>! </plist>! Interpreting Objective-C. © Tim Burks. March 4, 2014

27. Call a Remote API ;;! ;; test google geocoding API ! ;; API is limited to 2500 requests/(ip-address*day)! ;;! ! (load "RadHTTP")! (load "RadJSON")! ! (set street "1675 Owens Street")! (set city "San Francisco")! (set state "CA")! ! (set parameters (dict sensor:"false"! address:(+ street " "! city ", "! state " "! )))! (set query (parameters urlQueryString))! (set path (+ "http://maps.googleapis.com/maps/api/geocode/json?" query))! (set string (NSString stringWithContentsOfURL:(NSURL URLWithString:path)))! (set geocoding (string JSONValue))! ! (puts (geocoding description)) Interpreting Objective-C. © Tim Burks. March 4, 2014

28. {! results = ! (! …! ! geometry = {! location = {! lat = "37.76800009999999";! lng = "-122.3934754";! };! "location_type" = ROOFTOP;! viewport = {! northeast = {! lat = "37.76934908029149";! lng = "-122.3921264197085";! };! southwest = {! lat = "37.7666511197085";! lng = "-122.3948243802915";! };! };! };! types = (! "street_address"! );! }! );! status = OK;! }! Interpreting Objective-C. © Tim Burks. March 4, 2014

29. Write Unit Tests ;; test_array.nu! ;; tests for Nu array extensions.! ;;! ;; Copyright (c) 2007 Tim Burks, Radtastical Inc.! ! (class TestArray is NuTestCase! ! (- testCreate is! (set a (NSMutableArray arrayWithList:'(1 2)))! (a << "three")! (assert_equal 3 (a count))! (assert_equal 2 (a 1))! (assert_equal "three" (a 2)))! ! (- testEach is! (set i 0)! (set a (array 0 1 2))! (a each:! (do (x)! (assert_equal i x)! (set i (+ i 1))))! ;; iteration with break! (set a (array 0 1 2 3 4 5 6))! (set sum 0)! (a each:! (do (x)! Interpreting Objective-C. © Tim Burks. March 4, 2014

30. [hebephrenia:~/nu] tim% nutest test/test_array.nu! ! TestArray: running! --- testCreate! --- testEach! --- testEachInReverse! --- testEachWithIndex! --- testIndexing! --- testSortUsingBlock! --- testSortedArrayUsingBlock! --- testSortedArrayUsingSelector! TestArray: completed 8 tests/32 assertions/0 failures/0 errors! ! 2014-03-03 19:52:41.147 nush[10592:d07] All: completed 8 tests/32 assertions/0 failures/0 errors! ! 2014-03-03 19:52:41.148 nush[10592:d07] SUCCESS (0 failures, 0 errors) Interpreting Objective-C. © Tim Burks. March 4, 2014

31. Build iOS apps <dict> <key>action</key> <string>push sessions/2014/day/1</string> <key>image</key> <dict> <key>filename</key> <string>2014_bill_budge.jpg</string> <key>mask</key> <string>circle</string> <key>position</key> <string>left</string> </dict> <key>markdown</key> <string>Wednesday, January 29, 2014n# Inspiration</string> </dict> Interpreting Objective-C. © Tim Burks. March 4, 2014

34. (get "/radarid:"! (set radarnumber (radarid longLongValue))! (authenticate)! (set mongo (RadMongoDB new))! (mongo connect)! (set radar (mongo findOne:(dict number:radarnumber) inCollection:"openradar.radars"))! (if (and (radarid longLongValue) radar)! (then (set comments (mongo findArray:(dict $query:(dict radar_id:(radar _id:))! $orderby:(dict created:1))! inCollection:"openradar.comments"))! (htmlpage (+ "Radar " (radar number:))! (topbar)! (&div class:"row"! (&div class:"large-12 small-12 columns"! (panel-for-radar radar)))! (&div class:"row"! (&div class:"large-12 small-12 columns"! (&div class:"row"! (&div class:"large-2 medium-2 small-12 large-push-10 medium-push-10 columns" style:"text-align:right"! (if (eq (radar user:) screen_name)! (then (&a class:"button" href:(+ "/radars/edit/" (radar _id:)) "Edit"))! (else nil))! (field "Number" (radar number:))! (field "Originator" (mask-username (radar user:)))! (field "Date Originated" (radar originated:))! (field "Status" (radar status:))! (field "Resolved" (radar resolved:))! (field "Product" (radar product:))! (field "Product Version" (radar product_version:))! (field "Classification" (radar classification:))! (field "Reproducible" (radar reproducible:)))! (&div class:"large-10 large-pull-2 medium-10 medium-pull-2 small-12 columns" style:"padding:0 30px;"! (&p style:"white-space: pre-wrap; word-wrap: break-word; font-family:Courier, monospace; font-size:80%"! (if ((set description (radar description:)) length)! (then (escape (radar description:)))! (else (&em "No description provided."))))))! (&div class:"row"! (&div class:"large-10 medium-10 small-12 columns"! (&div class:"comments"! (comments map:! (do (comment)! (if (comment parent_id:)! (then "") ;; skip replies! (else (box-for-comment comment YES screen_name))))))))! (if screen_name! (then (&input id:"newcomment" type:"button" class:"button tiny" value:"Post a comment"))! (else (&p (&a href:"/signin" "Sign in") " to post comments and radars.")))! (&div style:"display:none;" id:"radar" (radar _id:))! (&br)! (&script type:"text/javascript" charset:"utf-8"! "if(jQuery("#error").text() == "") jQuery("#error").hide();")))))! (else nil)))! Interpreting Objective-C. © Tim Burks. March 4, 2014

39. MYNetwork objective-git UIKit Pantomime CocoaYAML NSURLRequest OTRKit MailCore SpriteKit SocketRocket NSKeyedArchiver google-api-objectivec-client PDFKit SSKeychain FMDB NSJSONSerialization CorePlot SSZipArchive PostgreSQL NSXPCConnection NSPropertyListSerialization PocketSVG AFNetworking MongoDB NSRegularExpression NSXMLDocument RestKit Xapian NSFileHandle MySQL NSSet PorterStemmer NSValue levelDB NSProcessInfo Simple-KML redis NSNumber SQLite NSDictionary libevent NSArray OpenGL libxml2 NSString NSURLSession AppKit Usage Desire Batteries Nuclear Power Included Craft http://programming.nu Insight Interpreting Objective-C. © Tim Burks. March 4, 2014

Interpreting Objective C

Interpreting Objective C

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