LINQ、Select連弾ってやります？

2015/04/11のJXUG第4回で発表した資料です

1. LINQɺSelect࿈஄ͬͯ΍Γ·͢ʁ ʲreferencesourceʳ ࣨ੕྄ଠ 2015/04/11(౔))ୈ4ճ)Japan)Xamarin)User)Group)Conference
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3. Xamarin.iOSͱXamarin.Androidͷ࿩
4. ͠·ͤΜʂ
5. ͓લͩΕΑʁ • ໊લ":"ࣨ੕྄ଠ • ࢓ࣄ":"UnityͰήʔϜ։ൃ • Twi+er":"@RyotaMurohoshi • ౤ߘઌ":"h+p:/ /qiita.com/RyotaMurohoshi
6. UnityΫϥελ͔Βདྷ·ͨ͠ʂ
7. ʮUnityͩͱLINQ͕݁ߏམͪͯਏ͍Αʂʯ ͍ͬͯ͏LTΛҎલͨ͠ऀͰ͢ɻ JXUGͷษڧձͰɺ͜Μͳ࿩Λ͍͍ͤͯͨͩͯ͋͞Γ͕ͱ͏͍͟͝·͢ɻ
8. ͱ͍͏͜ͱͰࠓ೔΋ Xamarin.iOS΋Xamarin.Android ͷ࿩͸͠·ͤΜɻ
9. ͯ͞ɺLINQ࠷ߴͰ͢ΑͶ
10. લ΋͓࿩͍͍ͤͯͨͩͨ͞௨Γ Unityͩͱ݁ߏLINQ͕མͪ·ͨ͠ ݪҼ͸AOTίϯύΠϥؔ࿈ͷΤϥʔɻԿ͕ਏ͍ͬͯiOS͚ͩམͪΔ
11. ͭΒ͍
12. ͳͷͰ࡞Γ·ͨ͠ɻ ʮUniLinqʯͱ͍͏ɺUnityͰ΋࢖͑Δ LINQޓ׵ϥΠϒϥϦ(β)
13. UniLinq͸mono/monoͷLINQͷίʔυ Λϕʔεʹ͍͔ͭ͘खΛՃ͑࡞Γ·ͨ͠ UnityͷUnity&Technologies/monoͷLINQͷίʔυͱൺ΂ AOTίϯύΠϧؔ࿈Τϥʔରࡦ͕͔ͳΓ͞Ε͍ͯ·ͨ͠
14. ͯ͞ɺ͜͜·ͰલৼΓͰ͢
15. ͋Δ೔ɺࣄ͕݅ى͖·ͨ͠
16. ʮ͋ΕɺmonoͷϦϙδτϦʹ LINQ%to%Objectsͷίʔυ͕ͳ͍ʯ h"ps:/ /github.com/mono/mono/blob/master/mcs/class/System.Core/System.Linq/Enumerable.cs
17. ͳɺΜͩͱɽɽɽɽ
18. ຊ೔ͷλΠτϧ
19. LINQɺSelect࿈஄ͬͯ΍Γ·͢ʁ ʲreferencesourceʳ
20. referencesource
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22. referencesource
23. ͦ͏Ͱ͢ͶɻLINQͷίʔυ΋ɺ referencesourceʹஔ͖׵ΘͬͨΜͰ͢Ͷ issue͸ίνϥ%h'ps:/ /github.com/mono/mono/pull/1477ɹ
24. referencesource h"ps:/ /github.com/Microso2/referencesource h"p:/ /www.mono+project.com/docs/about+mono/dotnet+integra8on/
25. referencesourceͷLINQͷίʔυɺ ͱͯ΋ݟ͍ͯͯ໘ന͍Ͱ͢ɻྫ͑͹ɺWhereͱSelectͷ࿈஄
26. ಡΈͣΒ͘ͳ͍Ͱ͔͢ʁ List<A> aList = LoadList (); IEnumerable<D> dList = aList .Select (a => CovetCtoD( CovetBtoC( ConvertAtoB( a ) ) ) );
27. ๻͸ͬͪ͜ͷํ͕޷͖Ͱ͢ɻ࿈஄ʂ List<A> aList = LoadList (); IEnumerable<D> dList = aList .Select (a => CovetAtoB(a)) .Select (b => CovetBtoC(b)) .Select (c => CovetCtoD(c));
28. ͜͏΋ॻ͚·͢Ͷɺ࿈஄ʂ List<A> aList = LoadList (); IEnumerable<D> dList = aList .Select (CovetAtoB) .Select (CovetBtoC) .Select (CovetCtoD);
29. ΦʔόʔϔουؾʹͳΓ·͢ʁ referencesource൛Ͱ͸ରࡦ͞Ε͍ͯ·͢ʂ
30. Whereͱ͔SelectΛޮ཰Α͘΍ΔͨΊʹ EnumerableΫϥε಺ʹ಺෦Ϋϥε܈͕ఆٛ͞Ε͍ͯΔ • WhereSelectEnumerableIterator • WhereSelectArrayIterator • WhereSelectListIterator ͳͲ
31. Έͳ͞ΜͳΒɺଟ෼ίʔυݟͨํ͕ૣ͍Ͱ͢ h"ps:/ /github.com/Microso2/referencesource/blob/master/System.Core/System/Linq/Enumerable.cs ɹ ͋ͱɺneue͞Μ͕ͱͬͯ΋Θ͔Γ΍͘͢·ͱΊΒΕ͍ͯ·͢ h"p:/ /www.slideshare.net/neuecc/an3internal3of3linq3to3objects329200657
32. ͓໿ଋ Xamarin͍͍ͳ͊ʙ Unityʹ΋ૣ͘དྷͳ͍͔ͳ͊ʙ
33. ·ͱΊ • monoͷίʔυɺreferencesourceΛΨϯΨϯ׆༻͍ͯ͠·͢Ͷ • referencesourceͷLINQͷίʔυ໘ന͍Ͱ͢Α • Where΍Selectͷ࿈஄ɺಡΈ΍͚͢Ε͹΍͍͍ͬͯͱࢥ͍·͢
34. ऄ଍ Unityʹ৽ొ৔ͨ͠IL2CPPͰɺUniLinq͍Βͳ͍ࢠʁ