Rust’ta Closure’lar: Fn, FnMut ve FnOnce’\u0131n Derinlemesine \u0130ncelenmesi<\/p>\n
Rust programlama dilinde closure’lar, fonksiyonel programlama paradigmas\u0131n\u0131n \u00f6nemli bir par\u00e7as\u0131d\u0131r. Ancak, Rust’\u0131n sahip oldu\u011fu g\u00fc\u00e7l\u00fc tip sistemi nedeniyle, closure’lar\u0131n nas\u0131l \u00e7al\u0131\u015ft\u0131\u011f\u0131 ve farkl\u0131 t\u00fcrlerinin (Fn, FnMut, FnOnce) ne anlama geldi\u011fi olduk\u00e7a \u00f6nemlidir. Bu makalede, closure’lar\u0131n Rust’taki davran\u0131\u015flar\u0131n\u0131, \u00f6zellikle de Fn, FnMut ve FnOnce t\u00fcrlerini detayl\u0131 bir \u015fekilde ele alaca\u011f\u0131z. \u00d6ncelikle, closure’lar\u0131n ne oldu\u011funu ve neden kullan\u0131ld\u0131\u011f\u0131n\u0131 anlamakla ba\u015flayal\u0131m. Ard\u0131ndan, her bir closure t\u00fcr\u00fcn\u00fcn \u00f6zelliklerini ve aralar\u0131ndaki farklar\u0131 inceleyece\u011fiz. Son olarak, \u00f6rneklerle konuyu peki\u015ftirece\u011fiz.<\/p>\n
Closure’lar, bir fonksiyonun tan\u0131mland\u0131\u011f\u0131 ba\u011flamda (scope) de\u011fi\u015fkenlere eri\u015febilen anonim fonksiyonlard\u0131r. Di\u011fer bir deyi\u015fle, closure’lar, kendilerini \u00e7evreleyen kod blo\u011funun de\u011fi\u015fkenlerine “kapal\u0131”d\u0131r (bu y\u00fczden “closure” olarak adland\u0131r\u0131l\u0131rlar). Bu \u00f6zellik, kodun daha okunabilir ve daha \u00f6zl\u00fc olmas\u0131n\u0131 sa\u011flar. \u00d6rne\u011fin, bir dizi \u00fczerinde i\u015flem yaparken, her bir eleman i\u00e7in ayr\u0131 bir fonksiyon tan\u0131mlamak yerine, bir closure kullanarak i\u015flemi daha k\u0131sa ve temiz bir \u015fekilde ger\u00e7ekle\u015ftirebiliriz.<\/p>\n
Rust, closure’lar\u0131 \u00fc\u00e7 farkl\u0131 t\u00fcrde s\u0131n\u0131fland\u0131r\u0131r: Fn, FnMut ve FnOnce. Bu s\u0131n\u0131fland\u0131rma, closure’\u0131n \u00f6d\u00fcn\u00e7 ald\u0131\u011f\u0131 (borrowed) de\u011fi\u015fkenlerle nas\u0131l etkile\u015fimde bulundu\u011funu belirler. Bu ayr\u0131m, Rust’\u0131n sahip oldu\u011fu \u00f6d\u00fcn\u00e7 alma (borrowing) ve sahiplik (ownership) sisteminin bir sonucudur ve bellek g\u00fcvenli\u011fini sa\u011flar.<\/p>\n
Fn t\u00fcr\u00fcndeki closure’lar, \u00e7evreleyen de\u011fi\u015fkenleri yaln\u0131zca okur. Bu de\u011fi\u015fkenleri de\u011fi\u015ftirmezler. Ba\u015fka bir deyi\u015fle, closure, bu de\u011fi\u015fkenlere sadece FnMut t\u00fcr\u00fcndeki closure’lar, \u00e7evreleyen de\u011fi\u015fkenleri hem okuyabilir hem de de\u011fi\u015ftirebilirler. Bu de\u011fi\u015fkenlere FnOnce t\u00fcr\u00fcndeki closure’lar, \u00e7evreleyen de\u011fi\u015fkenleri yaln\u0131zca bir kez kullanabilirler. Bu de\u011fi\u015fkenlere sahiplik (ownership) al\u0131rlar. Bu, en az k\u0131s\u0131tl\u0131 ve en tehlikeli (potansiyel olarak) closure t\u00fcr\u00fcd\u00fcr. Genellikle de\u011fi\u015fkeni t\u00fcketen (consume eden) i\u015flemler i\u00e7in kullan\u0131l\u0131r.<\/p>\n \u015eimdi, yukar\u0131da bahsedilen closure t\u00fcrlerini kullanarak baz\u0131 pratik \u00f6rnekleri inceleyelim. Bu \u00f6rnekler, closure’lar\u0131n ger\u00e7ek hayatta nas\u0131l kullan\u0131ld\u0131\u011f\u0131n\u0131 ve farkl\u0131 t\u00fcrlerinin \u00f6nemini daha iyi anlaman\u0131za yard\u0131mc\u0131 olacakt\u0131r. \u00d6rne\u011fin, bir vekt\u00f6r\u00fc s\u0131ralarken, Fn t\u00fcr\u00fcn\u00fc kullanarak her bir eleman\u0131 kar\u015f\u0131la\u015ft\u0131rabilir, FnMut t\u00fcr\u00fcn\u00fc kullanarak bir eleman\u0131 de\u011fi\u015ftirebilir veya FnOnce t\u00fcr\u00fcn\u00fc kullanarak bir eleman\u0131 t\u00fcketebiliriz.<\/p>\n Daha fazla bilgi i\u00e7in Fatih Soysal’\u0131n websitesini<\/a> ziyaret edebilirsiniz. Ayr\u0131ca, Rust resmi dok\u00fcmanlar\u0131na da bakabilirsiniz: Rust Dok\u00fcmanlar\u0131<\/a><\/p>\n Umar\u0131m bu makale, Rust’taki closure’lar ve Fn, FnMut ve FnOnce t\u00fcrleri hakk\u0131nda daha iyi bir anlay\u0131\u015f kazand\u0131rm\u0131\u015ft\u0131r. Herhangi bir sorunuz veya yorumunuz varsa, l\u00fctfen ileti\u015fime ge\u00e7mekten \u00e7ekinmeyin.<\/p>\n #Etiketler: Rust, Closure, Fn, FnMut, FnOnce, Fonksiyonel Programlama, Kapan\u0131\u015flar, \u00d6d\u00fcn\u00e7 Alma, Sahiplik, Bellek G\u00fcvenli\u011fi, Programlama, Yaz\u0131l\u0131m Geli\u015ftirme<\/p>\n","protected":false},"excerpt":{"rendered":"Rust’ta Closure’lar: Fn, FnMut ve FnOnce’\u0131n Derinlemesine \u0130ncelenmesi Rust programlama dilinde closure’lar, fonksiyonel programlama paradigmas\u0131n\u0131n \u00f6nemli bir par\u00e7as\u0131d\u0131r.…","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-14621","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\n&T<\/code> (referans) \u015feklinde eri\u015fir. Bu, en k\u0131s\u0131tl\u0131 closure t\u00fcr\u00fcd\u00fcr ve en g\u00fcvenli \u015fekilde kullan\u0131l\u0131r.<\/p>\n\nlet x = 5;\nlet closure = |y| x + y; \/\/ x'i de\u011fi\u015ftirmiyor, sadece okuyor.\n<\/code><\/pre>\nFnMut: De\u011fi\u015ftirilebilir Closure’lar<\/h3>\n
&mut T<\/code> (de\u011fi\u015ftirilebilir referans) \u015feklinde eri\u015firler. Fn t\u00fcr\u00fcnden daha az k\u0131s\u0131tl\u0131d\u0131r, ancak yine de bellek g\u00fcvenli\u011fini sa\u011flar.<\/p>\n\nlet mut x = 5;\nlet mut closure = |y| x += y; \/\/ x'i de\u011fi\u015ftiriyor.\n<\/code><\/pre>\nFnOnce: Tek Kullan\u0131ml\u0131k Closure’lar<\/h3>\n
\nlet x = 5;\nlet closure = move |y| x + y; \/\/ x'in sahipli\u011fini al\u0131yor.\n<\/code><\/pre>\n\u00d6rnekler ve Uygulamalar<\/h2>\n