{"id":29152,"date":"2025-09-08T12:15:25","date_gmt":"2025-09-08T09:15:25","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/powershell-icermiyor-icin-basit-bir-formul\/"},"modified":"2025-09-08T12:15:25","modified_gmt":"2025-09-08T09:15:25","slug":"powershell-icermiyor-icin-basit-bir-formul","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/powershell-icermiyor-icin-basit-bir-formul\/","title":{"rendered":"PowerShell: “\u0130\u00e7ermiyor” \u0130\u00e7in Basit Bir Form\u00fcl"},"content":{"rendered":"

# PowerShell’de “\u0130\u00e7ermiyor” Nas\u0131l Kontrol Edilir?<\/p>\n

PowerShell ile \u00e7al\u0131\u015f\u0131rken, bir dizinin veya dizenin belirli bir de\u011feri i\u00e7ermedi\u011fini<\/strong> kontrol etmek s\u0131k\u00e7a ihtiya\u00e7 duydu\u011fumuz bir i\u015flemdir. Bu makalede, PowerShell’de “i\u00e7ermiyor” kontrol\u00fcn\u00fc farkl\u0131 senaryolarda nas\u0131l ger\u00e7ekle\u015ftirece\u011finizi ad\u0131m ad\u0131m, yeni ba\u015flayanlardan ileri seviye kullan\u0131c\u0131lara kadar, kapsaml\u0131 bir \u015fekilde ele alaca\u011f\u0131z. Farkl\u0131 y\u00f6ntemleri kar\u015f\u0131la\u015ft\u0131rarak, performans optimizasyonuna odaklanaca\u011f\u0131z ve ger\u00e7ek d\u00fcnya \u00f6rnekleriyle konuyu peki\u015ftirece\u011fiz.<\/p>\n

\u00d6\u011frenme Yol Haritas\u0131<\/strong><\/p>\n

Bu makale, PowerShell’de “i\u00e7ermiyor” kontrol\u00fcn\u00fc \u00f6\u011frenme yolculu\u011funuzu \u00fc\u00e7 a\u015famada ele almaktad\u0131r:<\/p>\n

Yeni Ba\u015flayan:<\/strong> Temel komutlar ve basit \u00f6rneklerle ba\u015flayaca\u011f\u0131z.<\/p>\n

Orta Seviye:<\/strong> Ger\u00e7ek d\u00fcnya senaryolar\u0131n\u0131 ve optimizasyon ipu\u00e7lar\u0131n\u0131 ele alaca\u011f\u0131z.<\/p>\n

\u0130leri Seviye:<\/strong> Performans analizi ve nadir durumlarla (edge case’ler) ba\u015fa \u00e7\u0131kma stratejilerini inceleyece\u011fiz.<\/p>\n

1. Temel Kavramlar: PowerShell’de Dizi ve Dize \u0130\u015flemleri<\/strong><\/p>\n

PowerShell, diziler (arrays) ve dizeler (strings) \u00fczerinde i\u015flem yapmay\u0131 kolayla\u015ft\u0131ran g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r. -contains<\/code> operat\u00f6r\u00fc, bir dizinin belirli bir de\u011feri i\u00e7erip i\u00e7ermedi\u011fini kontrol eder. Ancak, bizim amac\u0131m\u0131z tam tersi: bir de\u011ferin i\u00e7erilmedi\u011fini<\/strong> kontrol etmek. Bunun i\u00e7in -notcontains<\/code> operat\u00f6r\u00fcn\u00fc kullanaca\u011f\u0131z. Ayr\u0131ca, dizeler \u00fczerinde i\u015flem yaparken -notmatch<\/code> operat\u00f6r\u00fcn\u00fc de kullanabiliriz. Bu operat\u00f6rler, ko\u015fullu ifadeler (if-else bloklar\u0131) i\u00e7inde kullan\u0131larak, istenen i\u015flemleri ger\u00e7ekle\u015ftirmemizi sa\u011flar.<\/p>\n

\u00d6rne\u011fin, $myArray = \"elma\", \"armut\", \"muz\"<\/code> dizisi tan\u0131mlanm\u0131\u015f olsun. $myArray -contains \"elma\"<\/code> ifadesi $true<\/code> d\u00f6nd\u00fcr\u00fcrken, $myArray -notcontains \"kiraz\"<\/code> ifadesi $true<\/code> d\u00f6nd\u00fcrecektir.<\/p>\n

2. PowerShell’de “\u0130\u00e7ermiyor” Kontrol\u00fc Nas\u0131l Yap\u0131l\u0131r? (Yeni Ba\u015flayan)<\/strong><\/p>\n

En basit yakla\u015f\u0131m, -notcontains<\/code> operat\u00f6r\u00fcn\u00fc kullanmakt\u0131r. Bu operat\u00f6r, bir dizi i\u00e7inde belirli bir \u00f6\u011fenin bulunmad\u0131\u011f\u0131n\u0131 kontrol eder.<\/p>\n

Ad\u0131m 1:<\/strong> Bir dizi tan\u0131mlay\u0131n.<\/p>\n

$meyveler = "elma", "armut", "muz"<\/code><\/pre>\n
Ad\u0131m 2:<\/strong>  -notcontains<\/code> operat\u00f6r\u00fcn\u00fc kullanarak kontrol edin.<\/p>\n
if ($meyveler -notcontains "kiraz") {\n  Write-Host "Dizi 'kiraz' i\u00e7ermiyor."\n} else {\n  Write-Host "Dizi 'kiraz' i\u00e7eriyor."\n}<\/code><\/pre>\n
Bu kod, “Dizi ‘kiraz’ i\u00e7ermiyor.” \u00e7\u0131kt\u0131s\u0131n\u0131 verecektir.  Bu basit \u00f6rnek, -notcontains<\/code> operat\u00f6r\u00fcn\u00fcn temel kullan\u0131m\u0131n\u0131 g\u00f6stermektedir.<\/p>\n
3. Ger\u00e7ek D\u00fcnya \u00d6rne\u011fi:  Kullan\u0131c\u0131 Ad\u0131 Do\u011frulama (Orta Seviye)<\/strong><\/p>\n
Bir uygulamada, kullan\u0131c\u0131 ad\u0131 kay\u0131t i\u015flemi s\u0131ras\u0131nda belirli yasakl\u0131 kelimeleri i\u00e7eren kullan\u0131c\u0131 adlar\u0131n\u0131n engellenmesi gerekebilir.  -notcontains<\/code> operat\u00f6r\u00fc burada devreye girer.<\/p>\n
$yasakliKelimeler = "admin", "root", "operator"\n$kullaniciAdi = Read-Host "Kullan\u0131c\u0131 ad\u0131n\u0131z\u0131 girin:"\n\nif ($yasakliKelimeler -notcontains $kullaniciAdi) {\n  Write-Host "Kullan\u0131c\u0131 ad\u0131 ge\u00e7erli."\n} else {\n  Write-Host "Kullan\u0131c\u0131 ad\u0131 yasakl\u0131 kelimeler i\u00e7eriyor. L\u00fctfen farkl\u0131 bir kullan\u0131c\u0131 ad\u0131 se\u00e7in."\n}<\/code><\/pre>\n
Bu kod, kullan\u0131c\u0131n\u0131n girdi\u011fi kullan\u0131c\u0131 ad\u0131n\u0131 $yasakliKelimeler<\/code> dizisiyle kar\u015f\u0131la\u015ft\u0131r\u0131r.  E\u011fer kullan\u0131c\u0131 ad\u0131 yasakl\u0131 kelimelerden birini i\u00e7eriyorsa, hata mesaj\u0131 verir.  Bu \u00f6rnek, -notcontains<\/code> operat\u00f6r\u00fcn\u00fcn ger\u00e7ek d\u00fcnya uygulamalar\u0131ndaki \u00f6nemini g\u00f6stermektedir.  Daha geli\u015fmi\u015f bir senaryoda, yasakl\u0131 kelimelerin bir dosyadan okunmas\u0131 ve daha karma\u015f\u0131k e\u015fle\u015ftirme i\u015flemleri yap\u0131labilir.<\/p>\n
4.  Dize E\u015fle\u015ftirme: -notmatch Operat\u00f6r\u00fc (Orta Seviye)<\/strong><\/p>\n
-notcontains<\/code> operat\u00f6r\u00fc, tam e\u015fle\u015fme yaparken, -notmatch<\/code> operat\u00f6r\u00fc, d\u00fczenli ifadeler (regular expressions) kullanarak daha karma\u015f\u0131k e\u015fle\u015ftirmeler yapmam\u0131z\u0131 sa\u011flar.  \u00d6rne\u011fin, bir e-posta adresinin ge\u00e7erli olup olmad\u0131\u011f\u0131n\u0131 kontrol etmek i\u00e7in -notmatch<\/code> operat\u00f6r\u00fc kullan\u0131labilir.<\/p>\n
$email = Read-Host "E-posta adresinizi girin:"\nif ($email -notmatch "\\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Z|a-z]{2,}\\b") {\n  Write-Host "Ge\u00e7ersiz e-posta adresi."\n} else {\n  Write-Host "Ge\u00e7erli e-posta adresi."\n}<\/code><\/pre>\n
Bu kod, d\u00fczenli ifade kullanarak e-posta adresinin ge\u00e7erlilik kontrol\u00fcn\u00fc yapar.  -notmatch<\/code> operat\u00f6r\u00fc, e-posta adresi d\u00fczenli ifadeyle e\u015fle\u015fmiyorsa $true<\/code> d\u00f6nd\u00fcr\u00fcr.  Bu \u00f6rnek, daha karma\u015f\u0131k e\u015fle\u015ftirme gereksinimleri i\u00e7in -notmatch<\/code> operat\u00f6r\u00fcn\u00fcn nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 g\u00f6stermektedir.<\/p>\n
5. Performans Optimizasyonu: B\u00fcy\u00fck Diziler \u0130\u00e7in Stratejiler (\u0130leri Seviye)<\/strong><\/p>\n
B\u00fcy\u00fck dizilerle \u00e7al\u0131\u015f\u0131rken, -notcontains<\/code> operat\u00f6r\u00fcn\u00fcn performans\u0131 d\u00fc\u015febilir.  Bu durumda, daha verimli y\u00f6ntemler kullanmak \u00f6nemlidir.  \u00d6rne\u011fin, -notin<\/code> operat\u00f6r\u00fc, -notcontains<\/code> operat\u00f6r\u00fcne g\u00f6re daha h\u0131zl\u0131 olabilir.  Ayr\u0131ca, \u00f6nceden indekslenmi\u015f veri yap\u0131lar\u0131 kullanarak arama i\u015flemlerini h\u0131zland\u0131rabilirsiniz.  Hash tablolar\u0131 veya HashSet objeleri, h\u0131zl\u0131 arama i\u015flemleri i\u00e7in idealdir.<\/p>\n
$buyukDizi = 1..1000000 # 1 milyondan fazla elemanl\u0131 dizi\n$aranacakDeger = 500000\n\n# -notcontains kullan\u0131m\u0131 (yava\u015f olabilir)\n$baslangicZamani = Get-Date\nif ($buyukDizi -notcontains $aranacakDeger) {Write-Host "De\u011fer yok"}\n$bitisZamani = Get-Date\nWrite-Host ("-notcontains s\u00fcresi: $($bitisZamani - $baslangicZamani)")\n\n# HashSet kullan\u0131m\u0131 (daha h\u0131zl\u0131)\n$hashSet = [System.Collections.Generic.HashSet[int]]::new($buyukDizi)\n$baslangicZamani = Get-Date\nif (-not $hashSet.Contains($aranacakDeger)) {Write-Host "De\u011fer yok"}\n$bitisZamani = Get-Date\nWrite-Host ("HashSet s\u00fcresi: $($bitisZamani - $baslangicZamani)")<\/code><\/pre>\n
Bu \u00f6rnek, b\u00fcy\u00fck bir dizi i\u00e7inde bir de\u011ferin olup olmad\u0131\u011f\u0131n\u0131 kontrol etmek i\u00e7in -notcontains<\/code> ve HashSet<\/code> kullan\u0131m\u0131n\u0131 kar\u015f\u0131la\u015ft\u0131r\u0131r.  Genellikle HashSet<\/code> kullan\u0131m\u0131 daha h\u0131zl\u0131 olacakt\u0131r.<\/p>\n
6. Edge Case’ler ve Hata Y\u00f6netimi (\u0130leri Seviye)<\/strong><\/p>\n
-notcontains<\/code> ve -notmatch<\/code> operat\u00f6rlerini kullan\u0131rken, baz\u0131 nadir durumlarla kar\u015f\u0131la\u015fabiliriz.  \u00d6rne\u011fin, bo\u015f dizilerle \u00e7al\u0131\u015f\u0131rken veya null de\u011ferlerle kar\u015f\u0131la\u015f\u0131ld\u0131\u011f\u0131nda, beklenmedik sonu\u00e7lar alabiliriz.  Bu durumlar\u0131 \u00f6nlemek i\u00e7in, kodumuzu hata y\u00f6netimi mekanizmalar\u0131yla donatmal\u0131y\u0131z.  try-catch<\/code> bloklar\u0131 kullanarak olas\u0131 hatalar\u0131 yakalayabilir ve uygun \u015fekilde tepki verebiliriz.<\/p>\n
try {\n  $bosDizi = @()\n  if ($bosDizi -notcontains "bir\u015fey") {Write-Host "Bo\u015f dizi"}\n}\ncatch {\n  Write-Error "Hata olu\u015ftu: $_"\n}<\/code><\/pre>\n
Bu \u00f6rnek, bo\u015f bir diziyle \u00e7al\u0131\u015f\u0131rken olas\u0131 hatalar\u0131 yakalamak i\u00e7in try-catch<\/code> blo\u011funu g\u00f6stermektedir.<\/p>\n
7.  PowerShell’de “\u0130\u00e7ermiyor” Kontrol\u00fc \u0130\u00e7in En \u0130yi Uygulamalar<\/strong><\/p>\n
* Veri Tiplerine Dikkat Edin:<\/strong>  -notcontains<\/code> operat\u00f6r\u00fc, veri tiplerine duyarl\u0131d\u0131r.  String ve integer de\u011ferleri kar\u015f\u0131la\u015ft\u0131r\u0131rken dikkatli olun.
\n* Performans Optimizasyonu:<\/strong> B\u00fcy\u00fck diziler i\u00e7in -notin<\/code> operat\u00f6r\u00fc veya HashSet<\/code> gibi verimli veri yap\u0131lar\u0131 kullan\u0131n.
\n* Hata Y\u00f6netimi:<\/strong>  try-catch<\/code> bloklar\u0131 kullanarak olas\u0131 hatalar\u0131 yakalay\u0131n.
\n* Okunabilir Kod:<\/strong> Kodunuzu a\u00e7\u0131k ve anla\u015f\u0131l\u0131r tutun.  Yorumlar ekleyerek kodun i\u015flevini a\u00e7\u0131klay\u0131n.<\/p>\n
Sonu\u00e7<\/strong><\/p>\n
PowerShell’de “i\u00e7ermiyor” kontrol\u00fc, -notcontains<\/code> ve -notmatch<\/code> operat\u00f6rleri kullan\u0131larak kolayca ger\u00e7ekle\u015ftirilebilir.  Ancak, performans ve hata y\u00f6netimi gibi konulara dikkat edilmelidir.  Bu makalede ele al\u0131nan y\u00f6ntemler ve \u00f6rnekler, farkl\u0131 senaryolarda “i\u00e7ermiyor” kontrol\u00fcn\u00fc nas\u0131l uygulayaca\u011f\u0131n\u0131z\u0131 anlaman\u0131za yard\u0131mc\u0131 olacakt\u0131r.  Daha fazla bilgi ve ileri d\u00fczey PowerShell teknikleri i\u00e7in [fatihsoysal.com](https:\/\/fatihsoysal.com) adresini ziyaret edebilirsiniz.<\/p>\n
S\u0131k\u00e7a Sorulan Sorular:<\/strong><\/p>\n
1. -notcontains<\/code> ve -notin<\/code> aras\u0131ndaki fark nedir?<\/strong>  -notcontains<\/code> diziler i\u00e7in kullan\u0131l\u0131rken, -notin<\/code> koleksiyonlar i\u00e7in daha genel bir yakla\u015f\u0131m sunar.  Performans a\u00e7\u0131s\u0131ndan bazen farklar olabilir.<\/p>\n
2. D\u00fczenli ifadeler kullanman\u0131n avantajlar\u0131 nelerdir?<\/strong> D\u00fczenli ifadeler, karma\u015f\u0131k e\u015fle\u015ftirme i\u015flemleri i\u00e7in g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r.  Daha esnek ve g\u00fc\u00e7l\u00fc e\u015fle\u015ftirme imkan\u0131 sa\u011flar.<\/p>\n
3. B\u00fcy\u00fck bir dosyadan veri okuyup “i\u00e7ermiyor” kontrol\u00fc nas\u0131l yap\u0131l\u0131r?<\/strong>  Get-Content<\/code> cmdlet’i ile dosyay\u0131 okuyup, verileri bir diziye atayarak -notcontains<\/code> veya -notin<\/code> operat\u00f6rlerini kullanabilirsiniz.<\/p>\n
4. -notcontains<\/code> operat\u00f6r\u00fc null de\u011ferlerle nas\u0131l \u00e7al\u0131\u015f\u0131r?<\/strong>  -notcontains<\/code> operat\u00f6r\u00fc null de\u011ferler i\u00e7in $false<\/code> d\u00f6nd\u00fcr\u00fcr.  Bu durumu ele almak i\u00e7in null kontrol\u00fc eklemeniz gerekebilir.<\/p>\n
5. Performans optimizasyonu i\u00e7in ba\u015fka hangi y\u00f6ntemler kullan\u0131labilir?<\/strong>  Paralel i\u015flem, \u00f6nbellekleme ve indeksleme gibi y\u00f6ntemler performans\u0131 art\u0131rabilir.<\/p>\n
Yazar: Fatih Soysal<\/p>\n","protected":false},"excerpt":{"rendered":"# PowerShell’de “\u0130\u00e7ermiyor” Nas\u0131l Kontrol Edilir? PowerShell ile \u00e7al\u0131\u015f\u0131rken, bir dizinin veya dizenin belirli bir de\u011feri i\u00e7ermedi\u011fini kontrol…","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":[1319],"tags":[],"class_list":{"0":"post-29152","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-powershell","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\nPowerShell: "\u0130\u00e7ermiyor" \u0130\u00e7in Basit Bir Form\u00fcl<\/title>\n<meta name=\"description\" content=\"Hi\u00e7bir etiketi bulunamad\u0131.\" \/>\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\/powershell-icermiyor-icin-basit-bir-formul\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PowerShell: "\u0130\u00e7ermiyor" \u0130\u00e7in Basit Bir Form\u00fcl\" \/>\n<meta property=\"og:description\" content=\"Hi\u00e7bir etiketi bulunamad\u0131.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/powershell-icermiyor-icin-basit-bir-formul\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-09-08T09:15:25+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=\"6 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/powershell-icermiyor-icin-basit-bir-formul\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/powershell-icermiyor-icin-basit-bir-formul\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"PowerShell: “\u0130\u00e7ermiyor” \u0130\u00e7in Basit Bir Form\u00fcl\",\"datePublished\":\"2025-09-08T09:15:25+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/powershell-icermiyor-icin-basit-bir-formul\/\"},\"wordCount\":1036,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"articleSection\":[\"PowerShell\"],\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/powershell-icermiyor-icin-basit-bir-formul\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/powershell-icermiyor-icin-basit-bir-formul\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/powershell-icermiyor-icin-basit-bir-formul\/\",\"name\":\"PowerShell: \\\"\u0130\u00e7ermiyor\\\" \u0130\u00e7in Basit Bir Form\u00fcl\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-09-08T09:15:25+00:00\",\"description\":\"Hi\u00e7bir etiketi bulunamad\u0131.\",\"breadcrumb\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/powershell-icermiyor-icin-basit-bir-formul\/#breadcrumb\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/powershell-icermiyor-icin-basit-bir-formul\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/powershell-icermiyor-icin-basit-bir-formul\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Anasayfa\",\"item\":\"https:\/\/fatihsoysal.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"PowerShell: “\u0130\u00e7ermiyor” \u0130\u00e7in Basit Bir Form\u00fcl\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/\",\"name\":\"Fatihsoysal.com\",\"description\":\"Blog - 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