Merhabalar, Dart dilinde de\u011fi\u015fken t\u00fcrlerini ve kullan\u0131m\u0131n\u0131 birinci b\u00f6l\u00fcmde detayl\u0131 bir \u015fekilde inceledik. Bu b\u00f6l\u00fcmde ise sabitler, dinamik t\u00fcrler \u00fczerinde konu\u015faca\u011f\u0131z.<\/p>\n\n\n\n
Sabit ifadeler de\u011fi\u015ftirilemeyen ve uygulama boyunca ayn\u0131 de\u011feri veya referans\u0131 ta\u015f\u0131yan de\u011fi\u015fkenlerdir. Dart programlama dilinde sabit bir ifade tan\u0131mlamak i\u00e7in iki yol mevcuttur. (final ve const)<\/p>\n\n\n\n
final<\/span>: <\/strong><\/em>Uygulama \u00e7al\u0131\u015fma s\u0131ras\u0131nda olu\u015fturulan sabit t\u00fcrd\u00fcr. Final de\u011fi\u015fkeninin de\u011feri sabit olarak do\u011frudan atanabilir, ya da s\u0131n\u0131f yap\u0131c\u0131 metodu i\u00e7erisinde de\u011feri atanmal\u0131d\u0131r. Bir s\u0131n\u0131ftan yeni bir nesne olu\u015ftururken bu sabit de\u011fer g\u00f6nderilerek de\u011fer atanabilir. Fakat bu de\u011fer atand\u0131ktan sonra de\u011fi\u015ftirilemez.<\/p>\n\n\n\n const<\/span>: <\/strong><\/em>Uygulamada derleme s\u0131ras\u0131nda olu\u015fturulan ve de\u011ferleri atanan sabit t\u00fcrlerdir. Bu de\u011fi\u015fken olu\u015fturulurken de\u011fer atamas\u0131 yap\u0131l\u0131r. Daha sonra bu de\u011fer de\u011fi\u015ftirilemez.<\/p>\n\n\n\n var<\/span>: <\/strong><\/em>Variable’\u0131n k\u0131saltmas\u0131 olarak olu\u015fturulmu\u015f bir de\u011fi\u015fken t\u00fcr\u00fcd\u00fcr. Bir de\u011fi\u015fken var olarak tan\u0131mlanm\u0131\u015f ise, ona t\u00fcr ba\u011f\u0131ms\u0131z herhangi bir de\u011fer atanabilir.(int, String, bool, custom vb.). Bu de\u011fi\u015fkenin t\u00fcr\u00fc \u00e7al\u0131\u015fma an\u0131nda veya derleme an\u0131nda belirlenir. Bu ise pek tavsiye edilen bir y\u00f6ntem de\u011fildir. Dart kaynaklar\u0131nda de\u011fi\u015fken t\u00fcr\u00fc biliniyor ise, do\u011frudan bu t\u00fcr ile tan\u0131mlanmas\u0131n\u0131n daha do\u011fru oldu\u011fu savunulmu\u015ftur.<\/p>\n\n\n\n dynamic<\/span>: <\/strong><\/em>Bir de\u011fi\u015fkenin t\u00fcr\u00fc \u00e7al\u0131\u015fma an\u0131nda de\u011fi\u015febiliyorsa veya t\u00fcr\u00fcn\u00fc bilmedi\u011fimiz bir de\u011fi\u015fken ise bu t\u00fcr kullan\u0131lmaktad\u0131r.<\/p>\n\n\n\n Merhabalar, Dart dilinde de\u011fi\u015fken t\u00fcrlerini ve kullan\u0131m\u0131n\u0131 birinci b\u00f6l\u00fcmde detayl\u0131 bir \u015fekilde inceledik. Bu b\u00f6l\u00fcmde ise sabitler, dinamik t\u00fcrler \u00fczerinde konu\u015faca\u011f\u0131z. Sabit ifadeler de\u011fi\u015ftirilemeyen ve uygulama boyunca ayn\u0131 de\u011feri veya referans\u0131 ta\u015f\u0131yan de\u011fi\u015fkenlerdir. Dart programlama dilinde sabit bir ifade tan\u0131mlamak i\u00e7in iki yol mevcuttur. (final ve const) final: Uygulama \u00e7al\u0131\u015fma s\u0131ras\u0131nda olu\u015fturulan sabit t\u00fcrd\u00fcr. Final…<\/p>\n","protected":false},"author":1,"featured_media":2180,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34],"tags":[],"post_series":[],"class_list":["post-1945","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dart","entry","has-media"],"yoast_head":"\n\/\/ Varsay\u0131lan olarak de\u011fer atamas\u0131 yap\u0131lm\u0131\u015ft\u0131r.\nfinal firstName = \"izzet\";\nfinal String lastName = \"\u00f6zt\u00fcrk\";\nfinal var lastName2 = \"\u00f6zt\u00fcrk\"; \/\/ Derleme hatas\u0131, final ile \u00f6rt\u00fcl\u00fc dinamik t\u00fcr olan var de\u011fi\u015fkeni ayn\u0131 anda kullan\u0131lamaz.\n\n\/\/ Yap\u0131c\u0131 metod i\u00e7erisinde de\u011fer atamas\u0131 yap\u0131lm\u0131\u015ft\u0131r.\nclass TestClass {\n final String name;\n TestClass(this.name);\n}<\/code><\/pre>\n\n\n\nconst number1 = 100;\nconst bool isHidden = false;\nconst var texture = \"test\"; \/\/ Derleme hatas\u0131, const ile \u00f6rt\u00fcl\u00fc dinamik t\u00fcr olan var de\u011fi\u015fkeni ayn\u0131 anda kullan\u0131lamaz.\n\nisHidden = true; \/\/ Hata, const t\u00fcr\u00fcnde de\u011fi\u015fkenlere \u00e7al\u0131\u015fma zaman\u0131nda de\u011fer atamas\u0131 yap\u0131lmaz.<\/code><\/pre>\n\n\n\nvar firstName = \"\u0130zzet\";\nvar age = 66;\nvar skills = [\"fast\", 999, false];<\/code><\/pre>\n\n\n\n\/\/ T\u00fcr String atand\u0131\ndynamic value = \"Dynamic Value\"; \n\n\/\/ T\u00fcr int oldu.\nvalue = 3; \n\n\/\/ T\u00fcr bool oldu.\nvalue = false;\n\n\/\/ T\u00fcr List oldu \nvalue = [\"change\", false, value];<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"