{"id":18785,"date":"2025-04-21T12:45:17","date_gmt":"2025-04-21T09:45:17","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/typescript-utility-types-faydali-tipler-ve-kullanimlari\/"},"modified":"2025-04-21T12:45:17","modified_gmt":"2025-04-21T09:45:17","slug":"typescript-utility-types-faydali-tipler-ve-kullanimlari","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/typescript-utility-types-faydali-tipler-ve-kullanimlari\/","title":{"rendered":"TypeScript Utility Types: Faydal\u0131 Tipler ve Kullan\u0131mlar\u0131"},"content":{"rendered":"<p>TypeScript Utility Types: Faydal\u0131 Tipler ve Kullan\u0131mlar\u0131<\/p>\n<p>Merhaba! Ben Fatih Soysal ve bu yaz\u0131da TypeScript&#8217;in sundu\u011fu g\u00fc\u00e7l\u00fc yard\u0131mc\u0131 tip (utility type) ara\u00e7lar\u0131ndan bahsedece\u011fim.  Bu tipler, kod yaz\u0131m\u0131n\u0131z\u0131 kolayla\u015ft\u0131rarak, daha temiz ve daha okunabilir bir kod \u00fcretmenize yard\u0131mc\u0131 olur.  \u00d6zellikle b\u00fcy\u00fck projelerde, kod kalitesini ve bak\u0131m\u0131n\u0131 iyile\u015ftirmek i\u00e7in olduk\u00e7a \u00f6nemlidirler.<\/p>\n<h2>Partial, Readonly ve Pick: Temel Yard\u0131mc\u0131 Tipler<\/h2>\n<p>TypeScript&#8217;in sundu\u011fu bir\u00e7ok yard\u0131mc\u0131 tip aras\u0131ndan en s\u0131k kullan\u0131lanlar\u0131ndan \u00fc\u00e7\u00fcn\u00fc inceleyelim: <code>Partial<\/code>, <code>Readonly<\/code> ve <code>Pick<\/code>.  \u00d6ncelikle, bu yard\u0131mc\u0131 tiplerin ne i\u015fe yarad\u0131klar\u0131n\u0131 ve nas\u0131l kullan\u0131ld\u0131klar\u0131n\u0131 \u00f6rneklerle a\u00e7\u0131klayal\u0131m. <\/p>\n<p><code>Partial<T><\/code> tipi, verilen <code>T<\/code> tipindeki t\u00fcm \u00f6zelliklerin iste\u011fe ba\u011fl\u0131 (optional) hale getirilmesini sa\u011flar.  Bu, \u00f6zellikle fonksiyonlar\u0131n parametrelerini tan\u0131mlarken veya nesnelerin k\u0131smi g\u00fcncellemelerini yaparken olduk\u00e7a faydal\u0131d\u0131r.<\/p>\n<pre><code class=\"language-typescript\">\ninterface User {\n  name: string;\n  age: number;\n  email: string;\n}\n\nconst partialUser: Partial<User> = {\n  name: 'Fatih',\n  email: 'fatih@fatihsoysal.com' \n};\n<\/code><\/pre>\n<p>G\u00f6rd\u00fc\u011f\u00fcn\u00fcz gibi, <code>partialUser<\/code> de\u011fi\u015fkeninde, <code>age<\/code> \u00f6zelli\u011fi belirtilmemi\u015f olsa da hata al\u0131nmaz. \u00c7\u00fcnk\u00fc <code>Partial<User><\/code> tipi sayesinde t\u00fcm \u00f6zellikler iste\u011fe ba\u011fl\u0131 hale gelmi\u015ftir.  Sonu\u00e7 olarak, daha esnek ve dinamik bir kod yaz\u0131m\u0131 sa\u011flar.<\/p>\n<p><code>Readonly<T><\/code> tipi ise, verilen <code>T<\/code> tipindeki t\u00fcm \u00f6zelliklerin salt okunur (read-only) hale getirilmesini sa\u011flar.  Bu, verilerin yanl\u0131\u015fl\u0131kla de\u011fi\u015ftirilmesini engellemek i\u00e7in kullan\u0131l\u0131r. \u00d6zellikle b\u00fcy\u00fck projelerde, hata ay\u0131klama s\u00fcrecinizi h\u0131zland\u0131rabilir.<\/p>\n<pre><code class=\"language-typescript\">\nconst readonlyUser: Readonly<User> = {\n  name: 'Fatih',\n  age: 30,\n  email: 'fatih@fatihsoysal.com'\n};\n\nreadonlyUser.name = 'Ali'; \/\/ Hata verecektir!\n<\/code><\/pre>\n<p>Bu \u00f6rnekte, <code>readonlyUser<\/code> de\u011fi\u015fkeninin \u00f6zelliklerini de\u011fi\u015ftirmeye \u00e7al\u0131\u015ft\u0131\u011f\u0131m\u0131zda bir hata alaca\u011f\u0131z. \u00c7\u00fcnk\u00fc <code>Readonly<User><\/code> tipi, t\u00fcm \u00f6zellikleri salt okunur olarak tan\u0131mlam\u0131\u015ft\u0131r.  Bu da veri b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc koruyarak kod g\u00fcvenli\u011fini art\u0131r\u0131r.  Ayr\u0131ca, bir nesnenin \u00f6zelliklerini de\u011fi\u015ftirmek istemedi\u011finiz durumlarda da olduk\u00e7a kullan\u0131\u015fl\u0131d\u0131r.<\/p>\n<p><code>Pick<T, K><\/code> tipi, verilen <code>T<\/code> tipinde belirtilen <code>K<\/code> \u00f6zelliklerini se\u00e7menizi sa\u011flar.  Bu, b\u00fcy\u00fck nesnelerden sadece ihtiyac\u0131n\u0131z olan \u00f6zellikleri alarak kodunuzu daha temiz ve daha okunabilir hale getirmenizi sa\u011flar.<\/p>\n<pre><code class=\"language-typescript\">\nconst pickedUser: Pick<User, 'name' | 'email'> = {\n  name: 'Fatih',\n  email: 'fatih@fatihsoysal.com'\n};\n<\/code><\/pre>\n<p>Burada, <code>pickedUser<\/code> de\u011fi\u015fkeni sadece <code>name<\/code> ve <code>email<\/code> \u00f6zelliklerini i\u00e7erir.  Di\u011fer \u00f6zellikler (\u00f6rne\u011fin, <code>age<\/code>) dahil de\u011fildir. Bu sayede, gereksiz \u00f6zelliklerle u\u011fra\u015fmadan, sadece gerekli verileri kullanabiliriz.<\/p>\n<h2>Record, Omit ve Exclude: Daha Geli\u015fmi\u015f Kullan\u0131mlar<\/h2>\n<p>\u015eimdi ise, biraz daha geli\u015fmi\u015f yard\u0131mc\u0131 tipler olan <code>Record<\/code>, <code>Omit<\/code> ve <code>Exclude<\/code>&#8216;u ele alal\u0131m.  Bu tipler, daha karma\u015f\u0131k senaryolarda kodunuzu basitle\u015ftirmenize yard\u0131mc\u0131 olur.<\/p>\n<p><code>Record<K, T><\/code> tipi, belirtilen <code>K<\/code> anahtarlar\u0131na sahip ve <code>T<\/code> tipinden de\u011ferlere sahip bir nesne olu\u015fturman\u0131z\u0131 sa\u011flar. Bu \u00f6zellikle, aray\u00fczler veya tipler olu\u015ftururken olduk\u00e7a kullan\u0131\u015fl\u0131d\u0131r.<\/p>\n<pre><code class=\"language-typescript\">\ntype StringDictionary = Record<string, string>; \/\/ String anahtarlar\u0131na ve string de\u011ferlerine sahip bir nesne\n<\/code><\/pre>\n<p><code>Omit<T, K><\/code> tipi, <code>T<\/code> tipinde belirtilen <code>K<\/code> \u00f6zelliklerini hari\u00e7 tutar.  <code>Pick<\/code>&#8216;in tam tersidir. Belirli \u00f6zellikleri kald\u0131rman\u0131z gerekti\u011finde olduk\u00e7a pratiktir.  \u00d6rne\u011fin, bir aray\u00fczden belirli bir \u00f6zelli\u011fi kald\u0131rmak istedi\u011finizde kullanabilirsiniz.<\/p>\n<pre><code class=\"language-typescript\">\ntype UserWithoutAge = Omit<User, 'age'>;\n<\/code><\/pre>\n<p>Son olarak, <code>Exclude<T, U><\/code> tipi, <code>T<\/code> tipinde ama <code>U<\/code> tipinde olmayan de\u011ferleri d\u00f6nd\u00fcr\u00fcr.  Tipleri filtrelemek i\u00e7in kullan\u0131l\u0131r ve genellikle birle\u015ftirme (union) tipleriyle birlikte kullan\u0131l\u0131r.<\/p>\n<pre><code class=\"language-typescript\">\ntype NumberOrString = number | string;\ntype OnlyNumbers = Exclude<NumberOrString, string>; \/\/ Sadece number tipindeki de\u011ferleri i\u00e7erir.\n<\/code><\/pre>\n<p>Bu \u00f6rnekte, <code>OnlyNumbers<\/code> tipi sadece <code>number<\/code> tipindeki de\u011ferleri i\u00e7erir, \u00e7\u00fcnk\u00fc <code>string<\/code> tipi <code>Exclude<\/code> ile hari\u00e7 tutulmu\u015ftur. Bu yard\u0131mc\u0131 tipler, karma\u015f\u0131k tipler \u00fczerinde i\u015flem yaparken \u00e7ok b\u00fcy\u00fck kolayl\u0131k sa\u011flar.<\/p>\n<h2>Sonu\u00e7<\/h2>\n<p>TypeScript&#8217;in yard\u0131mc\u0131 tipleri, kodunuzu daha g\u00fcvenli, temiz ve okunabilir hale getiren g\u00fc\u00e7l\u00fc ara\u00e7lard\u0131r.  Bu tiplerin do\u011fru ve etkili bir \u015fekilde kullan\u0131m\u0131, b\u00fcy\u00fck projelerde kod kalitesini \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131rabilir.  Umar\u0131m bu makale, TypeScript&#8217;in sundu\u011fu bu harika ara\u00e7lar\u0131 anlaman\u0131za yard\u0131mc\u0131 olmu\u015ftur. Daha fazla bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> adresini ziyaret edebilirsiniz.  Ayr\u0131ca, daha derinlemesine bilgi i\u00e7in a\u015fa\u011f\u0131daki kaynaklara da g\u00f6z atabilirsiniz:<\/p>\n<ul>\n<li><a href=\"https:\/\/www.typescriptlang.org\/docs\/handbook\/utility-types.html\">TypeScript Utility Types Resmi Dok\u00fcmantasyon<\/a><\/li>\n<li><a href=\"https:\/\/dev.to\/vunguyeen\/typescript-utility-types-useful-types-59l1\">TypeScript Utility Types: Useful Types (\u0130ngilizce)<\/a><\/li>\n<\/ul>\n<p><b>Not:<\/b> Bu makalede anlat\u0131lanlar, TypeScript&#8217;in sundu\u011fu yard\u0131mc\u0131 tiplerin sadece bir k\u0131sm\u0131n\u0131 kapsamaktad\u0131r.  Daha fazla yard\u0131mc\u0131 tip ve bunlar\u0131n kullan\u0131m\u0131 hakk\u0131nda bilgi edinmek i\u00e7in resmi TypeScript dok\u00fcmantasyonuna g\u00f6z atman\u0131z\u0131 \u00f6neririm.<\/p>\n<p>#Etiketler: TypeScript, Utility Types, Partial, Readonly, Pick, Record, Omit, Exclude, TypeScript Tipleri,  Programlama, Kod Kalitesi,  Yaz\u0131l\u0131m Geli\u015ftirme, Fatih Soysal,  fatihsoysal.com<\/p>\n","protected":false},"excerpt":{"rendered":"TypeScript Utility Types: Faydal\u0131 Tipler ve Kullan\u0131mlar\u0131 Merhaba! Ben Fatih Soysal ve bu yaz\u0131da TypeScript&#8217;in sundu\u011fu g\u00fc\u00e7l\u00fc yard\u0131mc\u0131&hellip;","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-18785","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>TypeScript Utility Types: Faydal\u0131 Tipler ve Kullan\u0131mlar\u0131<\/title>\n<meta name=\"description\" content=\"Merhaba! 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Ben Fatih Soysal ve bu yaz\u0131da TypeScript'in sundu\u011fu g\u00fc\u00e7l\u00fc yard\u0131mc\u0131 tip (utility type) ara\u00e7lar\u0131ndan bahsedece\u011fim. 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