Family Day update

Task/Find-common-directory-path/PowerShell/find-common-directory-path-1.psh

@@ -1,26 +1,27 @@
-# Find Common Directory Path
-# Input is an array of strings holding the paths
-function Get-CommonDirectoryPath($paths){
-
-   # Convert each path into array of tokens (i.e. convert array into jagged array)
-   for($i=0; $i -lt $paths.Count; $i++) {
-      $paths[$i] =  ($paths[$i].TrimStart('/').Split('/'))
-   }
-	
-   # Loop through tokens	
-   $c = -1
-   $found = $false
-   do {		# Do Until loop used to handle paths with different number of directories
-      $t = $paths[0][++$c]
-      for($r = 1; $r -lt $paths.Count; $r++) {
-         if ($t -ne $paths[$r][$c]) { $found=$true; break }
-      }
-   } until ($found)
-
-   # Return the answer
-   for($i=0; $i -lt $c; $i++) {$s += "/"+$paths[0][$i]}
-   return $s
+<#
+.Synopsis
+    Finds the deepest common directory path of files passed through the pipeline.
+.Parameter File
+    PowerShell file object.
+#>
+function Get-CommonPath {
+[CmdletBinding()]
+    param (
+        [Parameter(Mandatory=$true, ValueFromPipeline=$true)]
+        [System.IO.FileInfo] $File
+    )
+    process {
+        # Get the current file's path list
+        $PathList =  $File.FullName -split "\$([IO.Path]::DirectorySeparatorChar)"
+        # Get the most common path list
+        if ($CommonPathList) {
+            $CommonPathList = (Compare-Object -ReferenceObject $CommonPathList -DifferenceObject $PathList -IncludeEqual `
+                -ExcludeDifferent -SyncWindow 0).InputObject
+        } else {
+            $CommonPathList = $PathList
+        }
+    }
+    end {
+        $CommonPathList -join [IO.Path]::DirectorySeparatorChar
+    }
 }
-
-# Main Entry Point
-"The common directory path is " + (Get-CommonDirectoryPath ("/home/user1/tmp/coverage/test", "/home/user1/tmp/covert/operator", "/home/user1/tmp/coven/members"))

Task/Find-common-directory-path/PowerShell/find-common-directory-path-2.psh

@@ -1 +1,2 @@
-The common directory path is /home/user1/tmp
+"C:\a\b\c\d\e","C:\a\b\e\f","C:\a\b\c\d\x" | Get-CommonPath
+C:\a\b