{"id":8767,"date":"2025-01-06T07:00:16","date_gmt":"2025-01-06T04:00:16","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/typescript-ts1020-hatasi-indeks-imzasi-parametrelerinde-baslangic-degeri\/"},"modified":"2025-01-06T07:00:16","modified_gmt":"2025-01-06T04:00:16","slug":"typescript-ts1020-hatasi-indeks-imzasi-parametrelerinde-baslangic-degeri","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/typescript-ts1020-hatasi-indeks-imzasi-parametrelerinde-baslangic-degeri\/","title":{"rendered":"TypeScript TS1020 Hatas\u0131: \u0130ndeks \u0130mzas\u0131 Parametrelerinde Ba\u015flang\u0131\u00e7 De\u011feri"},"content":{"rendered":"<p><body><\/p>\n<p>TypeScript TS1020 Hatas\u0131: \u0130ndeks \u0130mzas\u0131 Parametrelerinde Ba\u015flang\u0131\u00e7 De\u011feri<\/p>\n<p>TypeScript geli\u015ftirme s\u00fcrecinizde s\u0131kl\u0131kla kar\u015f\u0131la\u015fabilece\u011finiz hatalardan biri olan TS1020 hatas\u0131, &#8220;\u0130ndeks imzas\u0131 parametresi bir ba\u015flat\u0131c\u0131ya sahip olamaz&#8221; anlam\u0131na gelir.  Bu hata, genellikle nesnelerin dinamik \u00f6zelliklerini tan\u0131mlamak i\u00e7in kulland\u0131\u011f\u0131m\u0131z indeks imzalar\u0131nda yanl\u0131\u015f bir kullan\u0131m sonucu ortaya \u00e7\u0131kar.  \u00d6ncelikle, indeks imzalar\u0131n\u0131n ne oldu\u011funu ve nas\u0131l kullan\u0131ld\u0131\u011f\u0131n\u0131 anlamak, hatan\u0131n nedenini bulmak i\u00e7in kritik \u00f6neme sahiptir.<\/p>\n<h2>\u0130ndeks \u0130mzalara Giri\u015f<\/h2>\n<p>TypeScript, g\u00fc\u00e7l\u00fc tip g\u00fcvenli\u011fi sa\u011flarken,  bazen \u00f6nceden belirlenmi\u015f t\u00fcm \u00f6zelliklere sahip olmayan nesneler ile \u00e7al\u0131\u015fmay\u0131 gerektirebilir. \u0130\u015fte bu noktada indeks imzalar\u0131 devreye girer.  Bir indeks imzas\u0131, nesnenin bilinmeyen \u00f6zelliklerine eri\u015fim ve atama i\u015flemlerini g\u00fcvenli bir \u015fekilde ger\u00e7ekle\u015ftirmenizi sa\u011flar.  \u00d6rne\u011fin, bir oyunun karakter \u00f6zelliklerini saklayan bir nesne d\u00fc\u015f\u00fcnelim. Bu nesne, her karakter i\u00e7in farkl\u0131 \u00f6zellikler i\u00e7erebilir. \u0130ndeks imzalar\u0131 sayesinde, bu dinamik \u00f6zelliklere eri\u015febiliriz.<\/p>\n<pre><code class=\"language-typescript\">\ninterface Oyuncu {\n  [key: string]: any; \/\/ \u0130ndeks imzas\u0131\n  isim: string;\n}\n\nlet oyuncu1: Oyuncu = {\n  isim: \"Ahmet\",\n  can: 100,\n  g\u00fc\u00e7: 50\n};\n<\/code><\/pre>\n<p>Yukar\u0131daki \u00f6rnekte, <code>[key: string]: any<\/code> sat\u0131r\u0131 bir indeks imzas\u0131d\u0131r.  Bu,  <code>oyuncu1<\/code> nesnesinin,  <code>isim<\/code> ve <code>can<\/code> gibi \u00f6nceden tan\u0131mlanm\u0131\u015f \u00f6zelliklerine ek olarak,  string t\u00fcr\u00fcnde key&#8217;lere sahip ba\u015fka \u00f6zellikler de i\u00e7erebilece\u011fini belirtir.  <code>any<\/code> tipi ise bu \u00f6zelliklerin herhangi bir t\u00fcrde olabilece\u011fini ifade eder.  Ancak,  daha iyi tip g\u00fcvenli\u011fi i\u00e7in,  burada daha spesifik bir t\u00fcr belirtmek daha sa\u011fl\u0131kl\u0131 olacakt\u0131r. \u00d6rne\u011fin,  <code>number<\/code> veya <code>string<\/code> gibi.<\/p>\n<h2>TS1020 Hatas\u0131n\u0131n Nedenleri ve \u00c7\u00f6z\u00fcmleri<\/h2>\n<p>TS1020 hatas\u0131, indeks imzas\u0131 parametresine bir ba\u015flang\u0131\u00e7 de\u011feri atamas\u0131 yap\u0131ld\u0131\u011f\u0131nda olu\u015fur.  TypeScript, indeks imzalar\u0131n\u0131n dinamik olarak tan\u0131mland\u0131\u011f\u0131n\u0131 ve \u00f6nceden belirlenmi\u015f bir de\u011fere sahip olmamas\u0131 gerekti\u011fini bilir.  Bu nedenle,  a\u015fa\u011f\u0131daki gibi bir kullan\u0131m hataya yol a\u00e7ar:<\/p>\n<pre><code class=\"language-typescript\">\ninterface YanlisKullan\u0131m {\n  [key: string] = \"default\"; \/\/ TS1020 hatas\u0131 burada olu\u015fur\n}\n<\/code><\/pre>\n<p>Bu hatay\u0131 gidermek i\u00e7in,  indeks imzas\u0131na ba\u015flang\u0131\u00e7 de\u011feri atamas\u0131n\u0131 kald\u0131rman\u0131z gerekir.  E\u011fer varsay\u0131lan bir de\u011fer kullanman\u0131z gerekiyorsa, bunu nesne olu\u015fturma a\u015famas\u0131nda yapabilirsiniz:<\/p>\n<pre><code class=\"language-typescript\">\ninterface DogruKullan\u0131m {\n  [key: string]: string;\n}\n\nlet nesne: DogruKullan\u0131m = {\n  \"anahtar1\": \"de\u011fer1\",\n  \"anahtar2\": \"de\u011fer2\"\n};\n\n\/\/Varsay\u0131lan de\u011fer ekleme\nnesne[\"anahtar3\"] = \"de\u011fer3\"; \/\/burada varsay\u0131lan de\u011fer atamas\u0131 yap\u0131yoruz.\n<\/code><\/pre>\n<p>Alternatif olarak, opsiyonel \u00f6zellikler kullanarak varsay\u0131lan de\u011ferleri tan\u0131mlayabilirsiniz.  Bu,  daha temiz ve okunabilir bir kod yap\u0131s\u0131 sa\u011flar. Bu \u015fekilde varsay\u0131lan de\u011ferler tan\u0131mlayarak indeks imzas\u0131na ihtiya\u00e7 duymadan da \u00e7\u00f6z\u00fcm \u00fcretebilirsiniz.  Ancak, ger\u00e7ekten dinamik \u00f6zelliklere ihtiya\u00e7 duyuyorsan\u0131z indeks imzas\u0131 kullan\u0131m\u0131 daha uygun olacakt\u0131r.<\/p>\n<h2>\u00d6zet<\/h2>\n<p>TypeScript&#8217;te TS1020 hatas\u0131, indeks imzas\u0131 parametrelerine ba\u015flang\u0131\u00e7 de\u011feri atamas\u0131 yap\u0131ld\u0131\u011f\u0131nda olu\u015fur.  Bu hatay\u0131 \u00f6nlemek i\u00e7in, indeks imzalar\u0131na ba\u015flang\u0131\u00e7 de\u011feri atamas\u0131n\u0131 kald\u0131rarak veya alternatif \u00e7\u00f6z\u00fcmler kullanarak sorunu \u00e7\u00f6zebilirsiniz.  Do\u011fru indeks imzas\u0131 kullan\u0131m\u0131,  g\u00fcvenli ve esnek bir \u015fekilde dinamik \u00f6zelliklere sahip nesneler olu\u015fturman\u0131za olanak tan\u0131r.  Daha fazla bilgi i\u00e7in <a href=\"https:\/\/dev.to\/ahmad_tibibi\/ts1020-an-index-signature-parameter-cannot-have-an-initializer-2oad\">bu makaleye<\/a>  bakabilirsiniz.  Ayr\u0131ca,  TypeScript ile ilgili daha fazla bilgi i\u00e7in kendi web sitemi <a href=\"https:\/\/fatihsoysal.com\">Fatih Soysal<\/a> ziyaret edebilirsiniz.<\/p>\n<p>#Etiketler: TypeScript, TS1020, \u0130ndeks \u0130mzas\u0131, Ba\u015flang\u0131\u00e7 De\u011feri, Hata \u00c7\u00f6z\u00fcm\u00fc, Programlama, JavaScript, Geli\u015ftirme<\/p>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"TypeScript TS1020 Hatas\u0131: \u0130ndeks \u0130mzas\u0131 Parametrelerinde Ba\u015flang\u0131\u00e7 De\u011feri TypeScript geli\u015ftirme s\u00fcrecinizde s\u0131kl\u0131kla kar\u015f\u0131la\u015fabilece\u011finiz hatalardan biri olan TS1020 hatas\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-8767","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 TS1020 Hatas\u0131: \u0130ndeks \u0130mzas\u0131 Parametrelerinde Ba\u015flang\u0131\u00e7 De\u011feri<\/title>\n<meta name=\"description\" content=\"TypeScript geli\u015ftirme s\u00fcrecinizde s\u0131kl\u0131kla kar\u015f\u0131la\u015fabilece\u011finiz hatalardan biri olan TS1020 hatas\u0131, &quot;\u0130ndeks imzas\u0131 parametresi bir ba\u015flat\u0131c\u0131ya sahip olamaz&quot; anlam\u0131na gelir. Bu hata, genellikle nesnelerin dinamik \u00f6zelliklerini tan\u0131mlamak i\u00e7in kulland\u0131\u011f\u0131m\u0131z indeks imzalar\u0131nda yanl\u0131\u015f bir kullan\u0131m sonucu ortaya \u00e7\u0131kar. \u00d6ncelikle, indeks imzalar\u0131n\u0131n ne oldu\u011funu ve nas\u0131l kullan\u0131ld\u0131\u011f\u0131n\u0131 anlamak, hatan\u0131n nedenini bulmak i\u00e7in kritik \u00f6neme sahiptir.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/typescript-ts1020-hatasi-indeks-imzasi-parametrelerinde-baslangic-degeri\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"TypeScript TS1020 Hatas\u0131: \u0130ndeks \u0130mzas\u0131 Parametrelerinde Ba\u015flang\u0131\u00e7 De\u011feri\" \/>\n<meta property=\"og:description\" content=\"TypeScript geli\u015ftirme s\u00fcrecinizde s\u0131kl\u0131kla kar\u015f\u0131la\u015fabilece\u011finiz hatalardan biri olan TS1020 hatas\u0131, &quot;\u0130ndeks imzas\u0131 parametresi bir ba\u015flat\u0131c\u0131ya sahip olamaz&quot; anlam\u0131na gelir. Bu hata, genellikle nesnelerin dinamik \u00f6zelliklerini tan\u0131mlamak i\u00e7in kulland\u0131\u011f\u0131m\u0131z indeks imzalar\u0131nda yanl\u0131\u015f bir kullan\u0131m sonucu ortaya \u00e7\u0131kar. \u00d6ncelikle, indeks imzalar\u0131n\u0131n ne oldu\u011funu ve nas\u0131l kullan\u0131ld\u0131\u011f\u0131n\u0131 anlamak, hatan\u0131n nedenini bulmak i\u00e7in kritik \u00f6neme sahiptir.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/typescript-ts1020-hatasi-indeks-imzasi-parametrelerinde-baslangic-degeri\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-01-06T04:00:16+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/typescript-ts1020-hatasi-indeks-imzasi-parametrelerinde-baslangic-degeri\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/typescript-ts1020-hatasi-indeks-imzasi-parametrelerinde-baslangic-degeri\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"TypeScript TS1020 Hatas\u0131: \u0130ndeks \u0130mzas\u0131 Parametrelerinde Ba\u015flang\u0131\u00e7 De\u011feri\",\"datePublished\":\"2025-01-06T04:00:16+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/typescript-ts1020-hatasi-indeks-imzasi-parametrelerinde-baslangic-degeri\/\"},\"wordCount\":505,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/typescript-ts1020-hatasi-indeks-imzasi-parametrelerinde-baslangic-degeri\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/typescript-ts1020-hatasi-indeks-imzasi-parametrelerinde-baslangic-degeri\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/typescript-ts1020-hatasi-indeks-imzasi-parametrelerinde-baslangic-degeri\/\",\"name\":\"TypeScript TS1020 Hatas\u0131: \u0130ndeks \u0130mzas\u0131 Parametrelerinde Ba\u015flang\u0131\u00e7 De\u011feri\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-01-06T04:00:16+00:00\",\"description\":\"TypeScript geli\u015ftirme s\u00fcrecinizde s\u0131kl\u0131kla kar\u015f\u0131la\u015fabilece\u011finiz hatalardan biri olan TS1020 hatas\u0131, \\\"\u0130ndeks imzas\u0131 parametresi bir ba\u015flat\u0131c\u0131ya sahip olamaz\\\" anlam\u0131na gelir. 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