2016 Update

Task/Search-a-list/PowerShell/search-a-list-2.psh

@@ -0,0 +1,57 @@
+function Find-Needle
+{
+    [CmdletBinding()]
+    [OutputType([int])]
+    Param
+    (
+        [Parameter(Mandatory=$true, Position=0)]
+        [string]
+        $Needle,
+
+        [Parameter(Mandatory=$true, Position=1)]
+        [string[]]
+        $Haystack,
+
+        [switch]
+        $LastIndex
+    )
+
+    if ($LastIndex)
+    {
+        $index = [Array]::LastIndexOf($Haystack,$Needle)
+
+        if ($index -eq -1)
+        {
+            Write-Verbose "Needle not found in Haystack"
+            return $index
+        }
+
+        if ((($Haystack | Group-Object | Where-Object Count -GT 1).Group).IndexOf($Needle) -ne -1)
+        {
+            Write-Verbose "Last needle found in Haystack at index $index"
+        }
+        else
+        {
+            Write-Verbose "Needle found in Haystack at index $index  (No duplicates were found)"
+        }
+
+        return $index
+    }
+    else
+    {
+        $index = [Array]::IndexOf($Haystack,$Needle)
+
+        if ($index -eq -1)
+        {
+            Write-Verbose "Needle not found in Haystack"
+        }
+        else
+        {
+            Write-Verbose "Needle found in Haystack at index $index"
+        }
+
+        return $index
+    }
+}
+
+$haystack = @("word", "phrase", "preface", "title", "house", "line", "chapter", "page", "book", "house")

Task/Search-a-list/PowerShell/search-a-list-3.psh

@@ -0,0 +1 @@
+Find-Needle "house" $haystack

Task/Search-a-list/PowerShell/search-a-list-4.psh

@@ -0,0 +1 @@
+Find-Needle "house" $haystack -Verbose

Task/Search-a-list/PowerShell/search-a-list-5.psh

@@ -0,0 +1 @@
+Find-Needle "house" $haystack -LastIndex -Verbose

Task/Search-a-list/PowerShell/search-a-list-6.psh

@@ -0,0 +1 @@
+Find-Needle "title" $haystack -LastIndex -Verbose

Task/Search-a-list/PowerShell/search-a-list-7.psh

@@ -0,0 +1 @@
+Find-Needle "something" $haystack -Verbose