Initial data commit

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

@@ -0,0 +1,27 @@
+<#
+.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
+    }
+}

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

@@ -0,0 +1,2 @@
+"C:\a\b\c\d\e","C:\a\b\e\f","C:\a\b\c\d\x" | Get-CommonPath
+C:\a\b