WintellectPowerShell

4.0.1.1

Code/Merge-HashTables.ps1

                                
function Merge-HashTables

{

    # I hate suppressing this warning, but I created this cmdlet long before the 

    # script analyzer came out. If someone has this in a script, changing the

    # cmdlet name will break them.

    [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseSingularNouns", "", Scope="Function")]

    param ($htold=$null, $htnew=$null)

<#

.SYNOPSIS

Merges two has tables based on their keys.

.DESCRIPTION

Thanks jon Z!

.LINK

http://stackoverflow.com/questions/8800375/merging-hashtables-in-powershell-how

#>

    $keys = $htold.getenumerator() | foreach-object {$_.key}

    $keys | foreach-object {

        $key = $_

        if ($htnew.containskey($key))

        {

            $htold.remove($key)

        }

    }

    $htnew = $htold + $htnew

    return $htnew

}

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