2016 Update

Task/Palindrome-detection/PowerShell/palindrome-detection-2.psh

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+function Test-Palindrome
+{
+  <#
+    .SYNOPSIS
+        Tests if a string is a palindrome.
+    .DESCRIPTION
+        Tests if a string is a true palindrome or, optionally, an inexact palindrome.
+    .EXAMPLE
+        Test-Palindrome -Text "racecar"
+    .EXAMPLE
+        Test-Palindrome -Text '"Deliver desserts," demanded Nemesis, "emended, named, stressed, reviled."' -Inexact
+  #>
+    [CmdletBinding()]
+    [OutputType([bool])]
+    Param
+    (
+        # The string to test for palindrominity.
+        [Parameter(Mandatory=$true)]
+        [string]
+        $Text,
+
+        # When specified, detects an inexact palindrome.
+        [switch]
+        $Inexact
+    )
+
+    if ($Inexact)
+    {
+        # Strip all punctuation and spaces
+        $Text = [Regex]::Replace("$Text($7&","[^1-9a-zA-Z]","")
+    }
+
+    $Text -match "^(?'char'[a-z])+[a-z]?(?:\k'char'(?'-char'))+(?(char)(?!))$"
+}

Task/Palindrome-detection/PowerShell/palindrome-detection-3.psh

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+Test-Palindrome -Text 'radar'

Task/Palindrome-detection/PowerShell/palindrome-detection-4.psh

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+Test-Palindrome -Text "In girum imus nocte et consumimur igni."

Task/Palindrome-detection/PowerShell/palindrome-detection-5.psh

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+Test-Palindrome -Text "In girum imus nocte et consumimur igni." -Inexact