JXUGのLTだけれどもUnity+iOS+LINQの話をしようと思う！

2014/11/22(土)に開かれた
第2回 Japan Xamarin User Group Conference 東日本編
(https://atnd.org/events/57246)

のLTで発表した資料です。

※元々はSlideShareで公開していた資料です。

1. JXUGͷLT͚ͩΕͲ΋ Unity+iOS+LINQ ͷ࿩Λ͠Α͏ͱࢥ͏ʂ ࣨ੕྄ଠ 2014/11/22(౔)(ୈ2ճ(Japan(Xamarin(User(Group(Conference(౦೔ຊฤ
2. ͍͢·ͤΜ
3. Xamarin.iOSͱXamarin.Androidͷ࿩
4. ΄ͱΜͲ͠·ͤΜʂ
5. ͓લͩΕΑʁ • ໊લ":"ࣨ੕྄ଠ • ࢓ࣄ":"UnityͰήʔϜ։ൃ • Twi+er":"@RyotaMurohoshi • ౤ߘઌ":"h+p:/ /qiita.com/RyotaMurohoshi
6. UnityΫϥελ͔Βདྷ·ͨ͠ʂ
7. UnityͬͯԿʁ • ήʔϜΤϯδϯ(ࠓ೔͸) • DI&ίϯςφ͡Όͳ͍Α • C#Ͱ։ൃ(ଞ͸BooͱUnityScript) • Xamarinࣾͷ੡඼ͷத֩Ͱ͋ΔmonoΛར༻ • ͨͩ͠ݹ͍mono
8. Xamarinͷ੡඼ͷத֩Ͱ͋Δmonoɻ ͜ͷmono࢖͍ͬͯΔUnityͷ࿩Λ JXUGͰͯ͠΋ɺ͍͍Ͱ͢ΑͶʁ
9. Ͷͬʂʁ ʮͦΜͳ࿩ɺฉ͖ͨ͘ͳ͍Αʯͬͯํɺ͍͢·ͤΜɻ
10. ಥવͰ͕͢
11. LINQ࠷ߴͰ͢ΑͶʂ
12. LINQ͝ଘ஌ͳํʁ LINQ࢖͍ͬͯΔํʁ
13. XLso%༷ͷXamarinͷϖʔδͰ΋ɺ LINQͰॻ͚Δ͜ͱΛਪ͍ͯ͠Δʂ ੲ͸XamarinຊՈʹ΋ʮC#Ͱॻ͚ͯɺLINQ࢖͍͍͑ͯΑͶʂʯͬͯ͋ͬͨؾ͕͢Δʂ h"p:/ /www.xlso,.com/jp/products/xamarin/android.html7ͱ͔
14. ૝૾͍ͯͩ͘͠͞ʂ LINQ͕࢖͑ͳ͘ͳΔ͜ͱΛʂ LINQ͕ಥવΤϥʔ͸͘͜ͱΛʂ
15. ࣮͸ɽɽɽ
16. Unity+iOSͩͱ LINQɺࢮͶΔΜͰ͢ʂʂʂ
17. Xamarin.iOS΋੍͍͔ͭ͘ݶ͕͋ΔΑ͏Ͱ͕͢ ͦ͏͍͏ϨϕϧͰ͸ͳ͍Ͱ͢ɻ h"p:/ /developer.xamarin.com/guides/ios/advanced_topics/limita8ons/
18. ࠓ೔͓࿩͢͠Δͷ͸ɺLINQ%to%ObjectsͰ͢ɻ
19. ʮLINQɺࢮͶΔʯͱ͸ɺiOS࣮ػͰ͍͔ͭ͘ͷLINQϝοιου͕ɺ ৚݅࣍ୈͰ࣮ߦ࣌ΤϥʔʹͳΔ͜ͱΛݴ͍ͬͯ·͢ɻ ͪͳΈʹɺήʔϜࣗମ͸ڧ੍ऴྃ͸͞Ε·ͤΜɻ
20. Կ͕ΤϥʔʹͳΔ͔ͱ͍͍·͢ͱ
21. Unity+iOSͰɺΤϥʔʹͳΔՄೳੑ͕͋ΔLINQϝιου AverageɹMaxɹMinɹSum FirstOrDefaultɹLastɹLastOrDefaultɹSingleɹSingleOrDefault ToDic9onaryɹToLookup JoinɹGroupJoin OrderByɹOrderByDescendingɹThenByɹThenByDescending ※!͜ΕΒͷϝιου࢖ͬͨΒඞͣམͪΔΘ͚Ͱ͸ͳͯ͘৚݅࣍ୈͰམͪΔ͜ͱ΋͋Δ
22. ݁ߏΤϥʔʹͳΔʂ ͔͠΋৚͕݅݁ߏෳࡶʂྫ͑͹͋ΔΦʔόʔϩʔυͰ͔ͭ஋ܕͱ͔
23. ৄ͘͠͸ɺͪ͜Βʂ Unity+iOSͰΤϥʔʹͳΔLINQͷ·ͱΊ h"p:/ /qiita.com/RyotaMurohoshi/items/6602e50d9e08b487f47
24. ͭΒ͍ʂ
25. Unity+iOSͰ΋LINQ͕࢖͍͍ͨʂ LINQېࢭͱ͔ͭΒ͗͢·͢ɽɽɽ C#Ͱॻ͘ͷʹɺLINQ࢖Θͳ͍ͷ͸΋͍ͬͨͳ͍
26. ࡞ͬͪΌ͍·͠ΐ͏ʂ
27. Unity+iOSͰ΋OKͳɺ LINQޓ׵ϥΠϒϥϦΛʂ
28. XamarinͰ͸(࠷৽ͷmono/monoͷϦϙδτϦͷํ)ɺ मਖ਼͞Ε͍ͯͯLINQམͪͳ͍Β͍͠ʂ
29. monoͷΫϥεϥΠϒϥϦ͸ MITϥΠηϯε
30. Ͱ͸࠷৽monoͷEnumerableͱ͔ؔ࿈Ϋϥε ίϐϖͯͪ͠ΐͬͱमਖ਼͢Ε͹͍͍ͷͰ͸!ʁ
31. ͬͦ͘͞΍ͬͯΈ·ͨ͠ʂ
32. ίϐϖͨ͠ίʔυͰɺ·ͣSumΛࢼ͠·͢ [Test] public void TestAverage () { string[] strings = new []{"Java", "Groovy", "C#", "F#"}; Assert.That (strings.Sum (it => it.Length), Is.EqualTo (14)); }
33. མͪͣʹ੒ޭʂ΍ͬͨʂ
34. ͜ͷௐࢠͰ࣍͸ToDic&nary [Test] public void TestToDictionay () { int[] nums = new []{0, 1, 2, 3, 4}; Dictionary<int, int> dict = nums.ToDictionary (it => it); }
35. ͋Εɺམͪͨɽɽɽ
36. ͭΒ͍
37. ࠷৽monoԿ͕มߋ͞Ε͍ͯΔͷ͔ʁ ԼهίϛοτͰΨοπΓมΘͬͨΑ͏Ͱ͢ʂ h"ps:/ /github.com/mono/mono/commit/071f495d6a4ce4951e2b2c9069586bd5bcde5>b ࢀߟ:h#p:/ /neue.cc/2014/07/01_474.html
38. 904$addi(ons$and$201$dele(ons. githubʹඈΜͰΈ͍ͯͩ͘͞ɺਅ྘ʂͼͬ͘Γ͢Δ΄Ͳ྘ʂ Sumͱ͔Averageͱ͔͕मਖ਼͞Ε͍ͯ·͢ h"ps:/ /github.com/mono/mono/commit/071f495d6a4ce4951e2b2c9069586bd5bcde5>b
39. ίʔυͷॏෳɺॏෳʂॏෳʂʂʂ σϦήʔτΛར༻͠ίʔυͷڞ௨Խ͍ͯͨ͠෦෼Λɺ͕ͬͭΓίʔυॏෳ͍ͤͯͨ͞ʂ
40. DRY?%େ੾Ͱ͢ΑͶʂ ͚ͲɺAPIఏڙଆ͸ίʔυͷحྷ͞΋େࣄ͚ͩΕͲɺ APIར༻ଆ͕ਖ਼͘͠حྷʹ࢖͑Δ͜ͱ͕େ੾ʂ
41. ԼهͷίϛοτϝοηʔδΛݟΔͱɺ AOTίϯύΠϧ؀ڥԼͰϥϜμࣜͷਪ࿦͕ ͏·͍͘ͳ͔͍͜ͱ͕͋ΔΈ͍ͨ h"ps:/ /github.com/mono/mono/commit/071f495d6a4ce4951e2b2c9069586bd5bcde5>b
42. ϥϯλΠϜଆ΍ίϯύΠϥଆͰ΋ δΣωϦΫε+ϥϜμࣜ+஋ܕؔ࿈͕मਖ਼͞Ε͍ͯΔͬΆ͍ʁ ࠷৽Xamarin.iOSͰ͸ਖ਼͘͠ਪ࿦Ͱ͖ΔδΣωϦΫε+ϥϜμ͕ࣜ UnityͷํͰ͸Ͱ͖ͳ͍ʁ
43. ࠷৽monoͦͷ··ίϐϖ͡ΌͩΊͰɺཁमਖ਼ʂ δΣωϦΫε+σϦήʔτͳՕॴΛపఈతʹ࡟আʂ
44. ݪҼʹͳ͍ͬͯΔFunc%on.Iden%tyͱ͔PredicateOf.Alwaysͱ͔ static class Function<T> { public static readonly Func<T, T> Identity = (t) => t; } static class PredicateOf<T> { public static readonly Func<T, bool> Always = (t) => true; } h"ps:/ /github.com/Unity3Technologies/mono/blob/unity34.5/mcs/class/System.Core/System.Linq/ Enumerable.cs ΑΓ
45. LINQͷϝιουʹ͸ɺෳ਺Φʔόʔϩʔυ͕͋Δ΋ͷ͕͍͔ͭ͘ nums.FirstOrDefault (); nums.FirstOrDefault (predicate: it => it > 3); nums.ToDictionary (keySelector: it => it); nums.ToDictionary (keySelector: it => it, elementSelector: it => it.toString ()); σϦήʔτ͕Ҿ਺ʹ௥Ճ͞Ε͍ͯΔ΋ͷ͕ଟ͍
46. σϦήʔτΛҾ਺ʹͱΔΦʔόʔϩʔυ σϦήʔτΛҾ਺ʹऔΒͳ͍Φʔόʔϩʔυ ͜ΕΒΛFunc%on.Iden%ty΍PredicateOf.AlwaysͰɺ ͍͍ײ͡ʹίʔυΛڞ௨Խ͍ͯ͠Δϝιου͕͋Δ ࠷৽mono͸ifσΟϨΫςΟϒͰPredicateOf.Always࢖Θͳ͍Α͏ʹ͍ͯ͠Δ ͚ΕͲίϐϖ͚ͨͩ͠Ͱ͸ifσΟϨΫςΟϒ͕ޮ͍͍ͯͳ͍
47. δΣωϦΫε+σϦήʔτͰ ͍͍ײ͡ʹίʔυΛڞ௨Խ͍ͯ͠ΔՕॴΛ పఈతʹॏෳɺॏෳʂɺॏෳʂʂʂ
48. DRY?%େ੾Ͱ͢ΑͶʂ ͚ͲɺAPIఏڙଆ͸ίʔυͷحྷ͞΋େࣄ͚ͩΕͲɺ APIར༻ଆ͕ਖ਼͘͠حྷʹ࢖͑Δ͜ͱ͕େ੾ʂ
49. ͜Μͳײ͡Ͱؤுͬͯ࡞Γ·͢ʂ δΣωϦΫε+ϥϜμࣜͳ෦෼Λແ͘͠·͢ ͦͯ֬͠ೝ͠·͢ʂ
50. ςετ͢Δͷ΋Ұۤ࿑ʂ • Unityͷ։ൃ؀ڥͩͱམͪͳ͍ɺγϛϡϨʔλͰ΋མͪͳ͍ • ςετ͸iOSͷ࣮ػͰ΍Βͳ͍ͱ͍͚ͳ͍ • NUnitΛiOSͷ࣮ػͰ૸ΒͤͨΒɺNUnit͕AOTؔ࿈ͷΤϥʔ
51. AOTؔ࿈ͷΤϥʔ͕͓͖ͳ͍͔ௐ΂ΔͨΊʹ ςετ͠Α͏ͱ͍ͯ͠Δͷʹɺ ςετϑϨʔϜϫʔΫࣗମ͕AOTؔ࿈Τϥʔͬͯʂ
52. ͭΒ͍ʂʂʂ
53. NUnitLiteΛ࢖ͬͯɺ iOS࣮ػͰςετΛ͍ͯ͠ΔྫΛൃݟʂ ੒ޭʂ (Xamarin.iOS΋NUnitLiteϕʔεΒ͍͠)
54. OrderByܥɺThenByܥ΋ରॲʂ ͜ΕΒͷରॲ͸ผΞϓϩʔν
55. ࡞͍ͬͯΔLINQޓ׵ϥΠϒϥϦʹ͍ͭͯ • ϥΠηϯεͱ͔ɺREADMEͱ͔ɺ͍Ζ͍Ζ੔͍͑ͯ·͢ • Unity+iOS+LINQɺ͜ͷϝιουམͪͨͱ͔৘ใԼ͍͞ʂ • ͦͷ಺githubͰެ։͠·͢ʂ • Ͳ͏΍ͬͯमਖ਼͔ͨ͠΋READMEʹॻ͍ͱ͖·͢ɻ(Qiitaʹ΋) • ͋ͱͰΞυόΠε͍ͩ͘͞ʂ
56. ·ͱΊ(1) • JXUGͰUnityͷ࿩ͯ͠ɺ͍͢·ͤΜͰͨ͠ʂ • LINQɺΈͳ͞Μ࢖͍·͢ΑͶ? • Unity+iOSͩͱ͜Μͳײ͡ͰɺLINQམͪ·͢ • ࠷৽mono͸͍Ζ͍Ζमਖ਼͞Ε͍ͯΔ • Unity+iOSͰ΋མͪͳ͍LINQޓ׵ϥΠϒϥϦ࡞੒த
57. ·ͱΊ(2) • ੲͷmono/monoͷLINQͷํʹ͸໰୊͕͋ͬͨ • ͚Ͳࠓ͸मਖ਼͞Ε͍ͯΔ • ͕͢͞Xamarin༷ࣾ • ͕͢͞monoίϛϡχςΟͷํʑ
58. One$more$thing
59. UnityͰ࢖͍ͬͯΔݹ͍monoͷLINQɺ ࣮૷ʹ͍͔ͭ͘ϛε͕͋ΔΈ͍ͨͰ͢ ྫ͑͹Exceptϝιου new []{1, 1, 2}.Except(new []{2});
60. ΍ͬͺΓC#Ͱॻ͘Ҏ্ LINQΛ࢖͍͍ͨɺUnityͰ΋ʂ
61. ͔ͩΒؤுͬͯ࡞ͬͯɺ ෍ڭ͍ͨ͠ͱࢥ͍·͢ʂ
62. ͋Γ͕ͱ͏͍͟͝·ͨ͠ @RyotaMurohoshi