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Swift weekly 2018/09/04
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Johnlin
September 04, 2018
Programming
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Swift weekly 2018/09/04
Johnlin
September 04, 2018
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Transcript
Swift पใ 2018/09/04 John Lin @johnlinvc
From the core • Swift 5: Start your engines
Swift 5: Start your engines • Release date: Late 2018
• ඪ: ABI stability (again) ɼแؚ generic, API resilience, memory ownership model • ။Լ૬༰ 4
Evolution • [SE-0220] count(where:) • [SE-0224] Support 'less than' operator
in compilation conditions • [SE-0225] isEven, isOdd, isMultiple • [SE-0226] Package Manager Target Based Dependency Resolution
[SE-0220] count(where:) • ཁዎᒬᏐ [1,2,3,4,5,6,7] ཫ໘༗ଟগۮᏐ䏆ʁ [1,2,3,4,5,6,7].filter { $0 %
2 == 0 }.count • Ṝᒬతሜ๏ଖመ䋯తൺֱຫɼfilter ။ઌ䋯Ұ࣍ ᅲɼ count ။࠶䋯Ұ࣍
[SE-0220] count(where:) [1,2,3,4,5,6,7].reduce(0) { $0 + ($1 % 2 ==
0 ? 1 : 0) } • Ṝᒬతሜ๏䋯తൺֱշɼୠੋ䔟㣛ੋࡏ၏ॄኄɻ
[SE-0220] count(where:) var count = 0 for n in [1,2,3,4,5,6,7]
{ count += n % 2 == 0 ? 1 : 0 } • reduce Ұᒬշɼෆաɻ
[SE-0220] count(where:) [1,2,3,4,5,6,7].count{$0 % 2 == 0} • ৽⃧ Sequence#countɼ䋯ىိ
reduce Ұᒬշɼ ෆաൺֱ໌֬ɻ
[SE-0224] Support 'less than' operator in compilation conditions #if swift(>=5.0)
print("this is 5.0") #endif • ݱࡏՄҎ༻্໘తํ๏ိᏗ Swift ൛ຊ • ෆաೳ༻ >=ɼཁখԙೳ༻ ! ိᒾҰෆੋ >= #if !swift(>=5.0) print("this is not 5.0") #endif
[SE-0224] Support 'less than' operator in compilation conditions #if swift(<5.0)
print("this is not 5.0") #endif • ೭ޙՄҎ༻ < ိᏗ Swift ൛ຊ
[SE-0225] isEven, isOdd, isMultiple • ᧷ಘ㑌࣍ཁሜ n % 2 ==
0 䆩ʁ • େՈ᧷ಘ -3 % 2 ੋଟগ䏆ʁ
[SE-0225] isEven, isOdd, isMultiple • ༗ਓఏҊཁՃ n.isEven, n.isOdd, n.isMultiple(of:) •
࠷ޙ༗ n.isMultiple(of:) ௨աɼ။Ճ౸ Swift 5 ཫɻ • ֩৺ᅶୂ᧷ಘ isEven Ṝछ؆ᄸతେՈࣗݾሜबɻ رೳޠݴతද໘ੵେখ߇੍ɻ
[SE-0226] Package Manager Target Based Dependency Resolution • Ұݸ Package
ཫ໘ৗৗ༗ଟෆಉ target, 㑌ݸ target ༗֤ࣗత dependencyɻݱࡏ༻ྃҰݸ Package ब။ॴ༗త dependency ਐိɼ೭ ޙ။༗༻౸త targetɻ
ྛ [SE-0226] Package Manager Target Based Dependency Resolution ߳া ᘈᘈ
ᘆࢠ थ
ྛ [SE-0226] Package Manager Target Based Dependency Resolution ߳া ᘈᘈ
ᘆࢠ थ
Community • 㟬ঋڃ iOS beta ྃ䆩ʁ • 㟬ใ໊ iplayground ྃ䆩ʁ
iOS 12 beta upgrade •
iPlayground • https://iplayground.io 10/20()-21(ʣ • ݱਖ਼ᄧථɼ㐸ߘதɻ