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Orijinale ne olur?",[132,135,138,141],{"key":133,"text":134},"a","Struct'lar değer semantiğine sahip olduğundan orijinal etkilenmez",{"key":136,"text":137},"b","Struct'lar referans olduğundan orijinal de değişir.",{"key":139,"text":140},"c","İki değişken artık çökmüş aynı örneği gösterir",{"key":142,"text":143},"d","Atamanın kendisi derlenmez.","Struct'lar değer tipidir: atama değeri kopyalar, bu yüzden kopyayı değiştirmek orijinali etkilemez; aynı referansı paylaşacak bir class örneğinden farklıdır.",{"id":146,"topic":9,"difficulty":129,"body":147,"options":148,"correct_key":139,"explanation":157},"019f956d-6e19-723a-88b2-90c1c9d0bc58","Bir `class` örneği yeni bir değişkene atanıyor, sonra o yeni değişken üzerinden bir property değiştiriliyor. Orijinale ne olur?",[149,151,153,155],{"key":133,"text":150},"Orijinal etkilenmez, class'lar atamada her zaman kopyalanır.",{"key":136,"text":152},"Program atamada hemen çöker.",{"key":139,"text":154},"Orijinal de değişikliği yansıtır",{"key":142,"text":156},"Yalnızca deinitializer erken çalışır","Class'lar referans tipidir: atama, altta yatan nesneyi değil referansı kopyalar; bu yüzden iki değişkenden biriyle yapılan değişiklik diğerinde de görünür.",{"id":159,"topic":9,"difficulty":160,"body":161,"options":162,"correct_key":136,"explanation":171},"019f956d-6e19-7b3a-878b-6be3257e2c97",2,"İki `Array\u003CInt>` değer bağlaması, biri değiştirilene kadar (\"copy-on-write\") aynı depolamayı paylaşır. Gerçek kopyayı ne tetikler?",[163,165,167,169],{"key":133,"text":164},"Sadece iki array'den birinin içeriğini okumak.",{"key":136,"text":166},"Depolamaya birden fazla referans varken bunlardan birini değiştirmeye çalışmak",{"key":139,"text":168},"Herhangi bir değişiklikten önce ikinci değişkeni tanımlamak.",{"key":142,"text":170},"Array'i bir fonksiyona parametre olarak geçirmek","Copy-on-write, paylaşılan depolamanın yalnızca depolamanın referans sayısı paylaşıldığını gösterdiğinde, değiştirme anında çoğaltıldığı anlamına gelir; sade okumalar veya ekstra bağlamalar tek başına kopyayı tetiklemez.",{"id":173,"topic":9,"difficulty":129,"body":174,"options":175,"correct_key":133,"explanation":184},"019f956d-6e1a-74a2-94c7-f39ae2b537dc","Bir property'yi `var name: String?` olarak tanımlamak ne anlama gelir?",[176,178,180,182],{"key":133,"text":177},"Property ya bir String değeri tutabilir ya da yok (nil) olabilir",{"key":136,"text":179},"Property'nin her zaman boş olmayan bir String tutacağı garantidir",{"key":139,"text":181},"Property yalnızca bir kez ayarlanabilir ve bir daha değiştirilemez.",{"key":142,"text":183},"`?` property'yi otomatik olarak thread-safe yapar.","`?`, tipi `Optional\u003CString>` olarak işaretler; yani property ya sarmalanmış bir String değeri tutar ya da bir değerin yokluğunu temsil eden `nil` olur.",{"id":186,"topic":9,"difficulty":160,"body":187,"options":188,"correct_key":136,"explanation":197},"019f956d-6e1a-7c6b-92bc-f8a054765a49","`let name: String? = nil` verildiğinde `name?.uppercased()` neye eşit olur?",[189,191,193,195],{"key":133,"text":190},"Runtime çökmesi, çünkü uppercased() nil üzerinde çağrılıyor",{"key":136,"text":192},"`nil`, çünkü optional chaining alıcı nil olduğunda kısa devre yapar",{"key":139,"text":194},"Boş bir string \"\".",{"key":142,"text":196},"Chaining force-unwrap gerektirdiğinden derleme zamanı hatası.","Optional chaining, alıcı `nil` olduğunda metodu çağırmak ya da çökmek yerine güvenle durur ve tüm ifade için `nil` değerine eşitlenir.",{"id":199,"topic":9,"difficulty":129,"body":200,"options":201,"correct_key":142,"explanation":210},"019f956d-6e1b-7634-8083-828b5ff771cb","`let value = maybeName ?? \"default\"` içinde nil-coalescing operatörü `??` ne yapar?",[202,204,206,208],{"key":133,"text":203},"`maybeName`'i zorla unwrap eder ve nil ise çöker",{"key":136,"text":205},"maybeName ne olursa olsun her zaman \"default\" döner.",{"key":139,"text":207},"maybeName'i bir if-kontrolü için Bool'a çevirir.",{"key":142,"text":209},"`maybeName`'in sarmalanmış değeri varsa onu kullanır, yoksa \"default\"'a düşer","`??` bir yedek sağlar: soldaki optional bir değer tutuyorsa o kullanılır, yoksa sağdaki varsayılan ifade değerlendirilip kullanılır, hiç 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