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nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
nescala 2013
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nescala 2013

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This is the tech talk I gave at my company (Audax Health) to share the things I learned at nescala 2013 (http://nescala.org/)

This is the tech talk I gave at my company (Audax Health) to share the things I learned at nescala 2013 (http://nescala.org/)

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  • 1. NESCALA NOTES by Hung Lin @hunglin
  • 2. nescala 20132 days event in PhiladelphiaDay 1: 17 talksSpeakers from typesafe, twitter, tumblr, ...Scala book authors: Bill Venners , Josh SuerethDay 2: unconference$50 entrance fee
  • 3. Function Patterns for the Asynchronous Webby Josh Suereth @ TypeSafe, author of Scala in Depth
  • 4. The new WebAsynchronousEvent drivenData drivenBig dataSingle page designComposition of servicesUser experiences
  • 5. Futureftr { uue / D smtm ltr / o oeie ae .. .}mp{rsl = a eut > / D smtigwt rsl / o oehn ih eut .. .}
  • 6. Monadic Flowdfrne(aa DRsl) Ftr[tl =ftr(tl..) e edrdt: beut: uueHm] uueHm(.)dfhnlRqet..:Ui ={ e adeeus(.) nt fr{ o dt < qey.. aa - ur(.) hm < rne(aa tl - edrdt) }yedwietlsce,hm) il rtHm(okt tl}
  • 7. Joinvlues Ftr[beut = a sr: uueDRsl] qey.. ur(.)vlpoet:Ftr[beut = a rjcs uueDRsl] qey.. ur(.)vldt:Ftr[DRsl,DRsl) = a aa uue(beut beut] (sr zppoet) ues i rjcsLs[uueDRsl] - Ftr[itDRsl] itFtr[beut] > uueLs[beut]
  • 8. The Essence of the Iterator PatternJeremy Gibbons and Bruno C. d. S. Oliveira @ Oxford University Computing Laboratory Monadic Map Applicative Functors Monadic Applicative Functors ...
  • 9. Cake Patternby Daniel Spiewak, Code Commit
  • 10. Not only for Dependency InjectiontatUeRpstrCmoet{ ri sreoioyopnn vlueRpstr:UeRpstr a sreoioy sreoioy casUeRpstr { ls sreoioy .. . }}tatUeSrieopnn { ri srevcCmoet ti:UeRpstrCmoet= hs sreoioyopnn > vlueSrie UeSrie a srevc: srevc casUeSrie{ ls srevc .. . }}
  • 11. Traits are modulestatUeMdl { ri sroue dflaUe(d Ln) Ue e odsri: og: sr}tatTetoue{ ri weMdl dfps(srd Ln,bd:Srn) e otueI: og oy tig}tatMSLsroueetnsUeMdl {..} ri yQUeMdl xed sroue .tatTitroueetnsTetouewt UeMdl {..} ri wteMdl xed weMdl ih sroue .vluies =nwMSLsroue a nvre e yQUeMdl wt Titroue{ ih wteMdl }
  • 12. Package is just a namespace to avoid name collision. So, instead import, use extends/with Explicit dependencies
  • 13. Interesting problem #1tatA{ ri vlfo Srn a o: tig}tatBetnsA{ ri xed vlbr=fo+"ol" a a o Wrd}casCetnsB{ ls xed vlfo="el" a o Hlo pitnbr rnl(a)} solution: use def or lazy val
  • 14. Interesting problem #2tatA{ ri ojc suf{ bet tf ojc Fo bet o ojc Br bet a ojc Bz bet a}}tatBetnsA{ ri xed ojc ma { bet or ojc Fo bet o ojc Bz bet a ojc Br bet a}} solution: use val
  • 15. abstract override tatTat { ri riA dfmto1l Ls[tig) Ls[tig e ehd(: itSrn]: itSrn] } tatTat etnsTat { ri riB xed riA oerd dfmto1l Ls[tig)=l: "riB vrie e ehd(: itSrn] + tat" } tatTat etnsTat { ri riC xed riA asrc oerd dfmto1l Ls[tig)=sprm btat vrie e ehd(: itSrn] ue.eto1l : "riC hd() + tat" } casCas { ls lsA ti:Tat = hs riA > dfso( {pitnmto1Ls(Cas") } e hw) rnl(ehd(it"lsA)) }
  • 16. Advanced Stream Processing
  • 17. Programming + Math
  • 18. Finagle
  • 19. scala.collection.approximate
  • 20. Play! 2 Framework
  • 21. Dependency management
  • 22. Day 2: Unconference typeclass unapply ScalaTest and a lot more
  • 23. precog8 people attendedgave 5 talks
  • 24. Audax @ nescala 2014 more people attend give talks (Lift, ScalaTest, ...) projects @ unconference

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