Adopting Functional

Keynote for the CUFP conference 2012 in Copenhagen by Kresten Krab Thorup.

Transcript

1. Adopting Functional Kresten Krab Thorup CTO, Trifork @drkrab
2. An “Object Head” in Erlang Land Kresten Krab Thorup CTO, Trifork @drkrab
3. identity properties mutable state specialize/ generalize whole/part
6. Java gets boring after a while...
7. Anthropology Class
8. Group Dynamics The discouraging truth about
9. Constant Innovation
10. The 10% rule
11. Teach It! To really learn something:
12. Why did objects succeed?
13. Ole-Johan Dahl & Kristen Nygaard
14. “...each Smalltalk object is a recursion on the entire possibilities of the computer. Thus its semantics are a bit like having thousands and thousands of computers all hooked together by a very fast network.” Alan Kay, HOPL 1993
15. Objects are interpreters
16. (“booh!”, ...) -> object -> (result, ...)
17. object.method(args, ...) vs. method(object, args, ...)
18. set.size() vs. size(set)
19. set.intersect(anotherSet) set.includes?(element) vs. intersect(set, anotherSet) includes?(set, element)
20. Conceptual modeling
21. Thinking Tools
22. Connect the solution to the problem
23. T ☠ THREADS & LOCKS AHEAD SINCE JAVA 1996
24. $!  $ % * method method method method data
25.  *# (%# * ()* % * &(%(# ) +(  ""+)*(*) $!  $ % * method method method method data  /%+4, ,( *!" $/ !$ % +"* &(%(##$ &(%"# *4) (%+&) % +$*%$) ** -%(! %$  &(*+"( !$ % *1#&"* 2%  *%($* &(%(##$ #!) *) +$*%$ (%+&) .&"*  (%+& (*( *$ *) %#&%$$*)  %$"/ -/ *% $ % *4) * * / %#$$ %* )** $ ,%( $  )$" +$* $ % * %# (""/ ) (*( *$ * )+# % *) &(*) $ % * )  !$ % )")+ %,(  )& +$*%$" ( * $ &"/  +""" #%+"( (%" !&
     *%($* *(#$%"%/ ,() (%# "$+ *% "  $)* % % *%($* &(%(##$ ) *% %#$ )**  *1$  "," +$* $ # $ *% , * "$+ )+&&% $  * )*(+*+( ** )(,) *%) +$*%$)  +$*%$) ( ") % *) * )*(+*+( ( *) "# %!"  #*%)  *# (%# * ()* % * &(%(# ) +(  ""+)*(*) $!  $ % * method method method method data  /%+4, ,( *!" $/ !$ % +"* &(%(##$ &(%"# (%+&) % +$*%$) ** -%(! %$  &(*+"( !$ % *1#&"  *%($* &(%(##$ #!) *) +$*%$ (%+&) .&" *1$  "," +$* $ # $  * )*(+*+( ** )(,) *% ") % *) * )*(+*+( ( *) "  *# (%# * ()* % * &(% $!  $ % * method method method method data  /%+4, ,( *!" $/ !$ %  (%+&) % +$*%$) ** -%(! %$  &  *%($* &(%(##$ #! (%+& (*( *$ *) %#&%$$*)  / %#$$ %* )** $ , (""/ ) (*( *$ * )+# % *) & %,(  )& +$*%$" ( * $
26. Function + Data State Containment Process + Message
27. Function + Data State Containment Process + Message
28. Software as Infrastructure
29. Enter: Erlang
30. Not a functional concurrent programming language Erlang is...
31. System for Reliable Computing Erlang is...
32. FP Language “OS for code” Erlang is...
33. Your favorite OS BEAM Emulator Your Erlang Program OTP Framework BEAM BIFs
34. Java Virtual Machine Your favorite OS ERJANG Your Erlang Program OTP Framework BEAM JVM BIFs
35. “...each Smalltalk object is a recursion on the entire possibilities of the computer. Thus its semantics are a bit like having thousands and thousands of computers all hooked together by a very fast network.”
36. “...each Erlang process is a recursion on the entire possibilities of the computer. Thus its semantics are a bit like having thousands and thousands of computers all hooked together by a very fast network.”
37. Except in Erlang, each “computer” is programmed with FP
38. Interactive Coordination Messaging + processes Want to understand! Concurrency Parallelism Functional Computation Utilize hardware Want to NOT understand
41. Post-Mainstream
42. “The Right Tool for the Job” Post-Mainstream Tech Mesh Conference London, December 2012
43. Interactive Systems
44. Thanks @drkrab