{"id":16310,"date":"2025-03-26T16:45:13","date_gmt":"2025-03-26T13:45:13","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/dizilerde-reduce-metodu-bir-seyler-yapalim\/"},"modified":"2025-03-26T16:45:13","modified_gmt":"2025-03-26T13:45:13","slug":"dizilerde-reduce-metodu-bir-seyler-yapalim","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/dizilerde-reduce-metodu-bir-seyler-yapalim\/","title":{"rendered":"Dizilerde Reduce Metodu: Bir \u015eeyler Yapal\u0131m!"},"content":{"rendered":"<p>Dizilerde Reduce Metodu: Bir \u015eeyler Yapal\u0131m!<\/p>\n<p>Merhaba arkada\u015flar, Fatih Soysal burada! Bu yaz\u0131da, JavaScript&#8217;te diziler \u00fczerinde i\u015flem yapmak i\u00e7in g\u00fc\u00e7l\u00fc bir ara\u00e7 olan <code>reduce<\/code> metodunu detayl\u0131 olarak inceleyece\u011fiz.  <code>reduce<\/code> metodu, bir diziyi tek bir de\u011fer haline indirgemek i\u00e7in kullan\u0131l\u0131r. Bu tek de\u011fer, dizi elemanlar\u0131n\u0131n i\u015flenmesi sonucu elde edilen bir toplam, ortalama, yeni bir dizi veya ba\u015fka herhangi bir yap\u0131 olabilir.  \u00d6ncelikle, <code>reduce<\/code> metodunun temel kullan\u0131m\u0131n\u0131 anlayal\u0131m, daha sonra da pratik \u00f6rneklerle konuyu peki\u015ftirelim.<\/p>\n<h2>Reduce Metodunun Temel Kullan\u0131m\u0131<\/h2>\n<p><code>reduce<\/code> metodu, iki parametre al\u0131r: bir callback fonksiyonu ve iste\u011fe ba\u011fl\u0131 bir ba\u015flang\u0131\u00e7 de\u011feri. Callback fonksiyonu, her bir dizi eleman\u0131 i\u00e7in \u00e7a\u011fr\u0131l\u0131r ve d\u00f6rt parametre al\u0131r: <\/p>\n<ul>\n<li><code>accumulator<\/code>: Sonu\u00e7 de\u011feri. Her \u00e7a\u011fr\u0131da \u00f6nceki \u00e7a\u011fr\u0131n\u0131n sonucu veya ba\u015flang\u0131\u00e7 de\u011feri olur.<\/li>\n<li><code>currentValue<\/code>: Dizi eleman\u0131n\u0131n kendisi.<\/li>\n<li><code>currentIndex<\/code>: Dizi eleman\u0131n\u0131n dizideki indexi.<\/li>\n<li><code>array<\/code>: \u0130\u015flem yap\u0131lan dizi.<\/li>\n<\/ul>\n<p>\u0130\u015fte basit bir \u00f6rnek:  Bir dizi i\u00e7indeki say\u0131lar\u0131n toplam\u0131n\u0131 bulmak i\u00e7in <code>reduce<\/code> metodunu nas\u0131l kullanabilece\u011fimizi g\u00f6relim:<\/p>\n<pre><code class=\"language-javascript\">\nconst numbers = [1, 2, 3, 4, 5];\nconst sum = numbers.reduce((accumulator, currentValue) => accumulator + currentValue, 0); \nconsole.log(sum); \/\/ \u00c7\u0131kt\u0131: 15\n<\/code><\/pre>\n<p>Bu \u00f6rnekte, <code>reduce<\/code> metodu, her bir say\u0131y\u0131 <code>accumulator<\/code> de\u011fi\u015fkenine ekler.  Ba\u015flang\u0131\u00e7 de\u011feri olarak 0 verdi\u011fimiz i\u00e7in toplama i\u015flemi 0&#8217;dan ba\u015flar. Sonu\u00e7 olarak, dizideki t\u00fcm say\u0131lar\u0131n toplam\u0131 olan 15 de\u011ferini elde ederiz.  G\u00f6r\u00fcld\u00fc\u011f\u00fc gibi olduk\u00e7a basit ve etkilidir.  \u015eimdi daha karma\u015f\u0131k \u00f6rnekleri inceleyelim.<\/p>\n<h2>Daha Karma\u015f\u0131k \u00d6rnekler<\/h2>\n<p><code>reduce<\/code> metodu, sadece toplama i\u015flemi i\u00e7in de\u011fil, bir\u00e7ok farkl\u0131 i\u015flem i\u00e7in kullan\u0131labilir. \u00d6rne\u011fin, bir dizi i\u00e7indeki nesneleri tek bir nesneye birle\u015ftirmek i\u00e7in de kullan\u0131labilir.  A\u015fa\u011f\u0131daki \u00f6rnekte, her bir nesnenin \u00f6zelliklerini birle\u015ftirerek yeni bir nesne olu\u015ftural\u0131m:<\/p>\n<pre><code class=\"language-javascript\">\nconst people = [\n  { name: 'Ahmet', age: 30 },\n  { name: 'Mehmet', age: 25 },\n  { name: 'Ay\u015fe', age: 35 }\n];\n\nconst combined = people.reduce((acc, person) => ({\n  ...acc, \n  [person.name]: person.age \n}), {});\n\nconsole.log(combined); \/\/ \u00c7\u0131kt\u0131: { Ahmet: 30, Mehmet: 25, Ay\u015fe: 35 }\n<\/code><\/pre>\n<p>Bu \u00f6rnekte, <code>reduce<\/code> metodu, her bir ki\u015finin ad\u0131n\u0131 ve ya\u015f\u0131n\u0131 birle\u015ftirip tek bir nesnede topluyor.  Burada, spread operat\u00f6r\u00fc (&#8230;) mevcut nesneyi kopyalamak ve yeni \u00f6zellik eklemek i\u00e7in kullan\u0131l\u0131yor.  Sonu\u00e7 olarak, her ki\u015finin ad\u0131 key, ya\u015f\u0131 ise value olarak yeni bir nesne elde ediyoruz.<\/p>\n<p>Ba\u015fka bir \u00f6rnek olarak, bir dizi i\u00e7indeki stringleri birle\u015ftirerek tek bir string olu\u015fturmay\u0131 ele alal\u0131m.  Bu durum, bir formda girilen verileri tek bir stringde birle\u015ftirmek i\u00e7in olduk\u00e7a faydal\u0131d\u0131r.<\/p>\n<pre><code class=\"language-javascript\">\nconst strings = ['Merhaba', ' ', 'd\u00fcnya', '!'];\nconst combinedString = strings.reduce((acc, str) => acc + str, '');\nconsole.log(combinedString); \/\/ \u00c7\u0131kt\u0131: Merhaba d\u00fcnya!\n<\/code><\/pre>\n<p>Bu \u00f6rnekte, <code>reduce<\/code> metodu, dizideki her bir stringi birle\u015ftirerek tek bir string olu\u015fturuyor.  Bo\u015f string (&#8220;&#8221;) ba\u015flang\u0131\u00e7 de\u011feri kullanarak,  stringleri birle\u015ftirmeye ba\u015fl\u0131yoruz.<\/p>\n<h2>Sonu\u00e7<\/h2>\n<p><code>reduce<\/code> metodu, JavaScript dizilerinde g\u00fc\u00e7l\u00fc ve esnek bir i\u015flevsellik sunar.  Bu makalede,  temel kullan\u0131m\u0131ndan daha karma\u015f\u0131k senaryolara kadar bir\u00e7ok \u00f6rne\u011fi inceledik.  Umar\u0131m bu bilgiler,  <code>reduce<\/code> metodunu daha iyi anlaman\u0131za ve projelerinizde kullanman\u0131za yard\u0131mc\u0131 olmu\u015ftur.  Daha fazla bilgi i\u00e7in  <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> sitesini ziyaret edebilirsiniz.  Ayr\u0131ca, konu hakk\u0131nda daha fazla kaynak i\u00e7in  <a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/JavaScript\/Reference\/Global_Objects\/Array\/reduce\">MDN Web Docs<\/a>  belgesine bakabilirsiniz.<\/p>\n<p><strong>#Etiketler:<\/strong> JavaScript, Reduce, Diziler, Array, Programlama, Web Geli\u015ftirme, Fatih Soysal,  reduce metodu, javascript reduce \u00f6rnekleri<\/p>\n","protected":false},"excerpt":{"rendered":"Dizilerde Reduce Metodu: Bir \u015eeyler Yapal\u0131m! Merhaba arkada\u015flar, Fatih Soysal burada! Bu yaz\u0131da, JavaScript&#8217;te diziler \u00fczerinde i\u015flem yapmak&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-16310","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>Dizilerde Reduce Metodu: Bir \u015eeyler Yapal\u0131m!<\/title>\n<meta name=\"description\" content=\"Merhaba arkada\u015flar, Fatih Soysal burada! Bu yaz\u0131da, JavaScript&#039;te diziler \u00fczerinde i\u015flem yapmak i\u00e7in g\u00fc\u00e7l\u00fc bir ara\u00e7 olan reduce metodunu detayl\u0131 olarak inceleyece\u011fiz. reduce metodu, bir diziyi tek bir de\u011fer haline indirgemek i\u00e7in kullan\u0131l\u0131r. Bu tek de\u011fer, dizi elemanlar\u0131n\u0131n i\u015flenmesi sonucu elde edilen bir toplam, ortalama, yeni bir dizi veya ba\u015fka herhangi bir yap\u0131 olabilir. \u00d6ncelikle, reduce metodunun temel kullan\u0131m\u0131n\u0131 anlayal\u0131m, daha sonra da pratik \u00f6rneklerle konuyu peki\u015ftirelim.\" \/>\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\/dizilerde-reduce-metodu-bir-seyler-yapalim\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dizilerde Reduce Metodu: Bir \u015eeyler Yapal\u0131m!\" \/>\n<meta property=\"og:description\" content=\"Merhaba arkada\u015flar, Fatih Soysal burada! Bu yaz\u0131da, JavaScript&#039;te diziler \u00fczerinde i\u015flem yapmak i\u00e7in g\u00fc\u00e7l\u00fc bir ara\u00e7 olan reduce metodunu detayl\u0131 olarak inceleyece\u011fiz. reduce metodu, bir diziyi tek bir de\u011fer haline indirgemek i\u00e7in kullan\u0131l\u0131r. Bu tek de\u011fer, dizi elemanlar\u0131n\u0131n i\u015flenmesi sonucu elde edilen bir toplam, ortalama, yeni bir dizi veya ba\u015fka herhangi bir yap\u0131 olabilir. \u00d6ncelikle, reduce metodunun temel kullan\u0131m\u0131n\u0131 anlayal\u0131m, daha sonra da pratik \u00f6rneklerle konuyu peki\u015ftirelim.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/dizilerde-reduce-metodu-bir-seyler-yapalim\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-03-26T13:45:13+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\/dizilerde-reduce-metodu-bir-seyler-yapalim\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/dizilerde-reduce-metodu-bir-seyler-yapalim\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"Dizilerde Reduce Metodu: Bir \u015eeyler Yapal\u0131m!\",\"datePublished\":\"2025-03-26T13:45:13+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/dizilerde-reduce-metodu-bir-seyler-yapalim\/\"},\"wordCount\":506,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/dizilerde-reduce-metodu-bir-seyler-yapalim\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/dizilerde-reduce-metodu-bir-seyler-yapalim\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/dizilerde-reduce-metodu-bir-seyler-yapalim\/\",\"name\":\"Dizilerde Reduce Metodu: Bir \u015eeyler Yapal\u0131m!\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-03-26T13:45:13+00:00\",\"description\":\"Merhaba arkada\u015flar, Fatih Soysal burada! 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