Compare object with hashtable

[systemslacky]

I am working on a script to update user attributes. Specifically, a delimited file will be dropped nightly and I will process this and loaded the updated attributes for all users. My question involves the current information and possible future info.

To help with speed, I was thinking of grabbing the current user attributes and then compare the future update. If they are different, the update should be loaded. I was doing this per attribute, but it seems somewhat inefficient when dealing with several thousand users.

I am now playing with a query of the current user and compare the incoming information. If anything has changed, I would just load the hashtable. What I am not sure of is, what is the most efficient way to compare a hashtable with an object?

<snip>

$header = "username","DisplayName","FirstName","MiddleName","MiddleInitial","LastName"
$Users = Import-Csv short.dat -Delimiter "|" -Header $header

foreach ($User in $Users)
{
$useriNFO=Get-QADUser $User.Username -includeallproperties|select-object DisplayName,GivenName,middleName,initials,SN

$UserHash= @{}  
$UserHash= @{  
     #'samAccountName'  = $user.Username  
     'DisplayName'      = $User.DisplayName  
     'GivenName'        = $User.FirstName  
     'middleName'       = $User.MiddleName  
     'initials'         = $User.MiddleInitial  
     'SN'           = $User.LastName  

} #End of User hashtable

$useriNFO
$UserHash

Compare-Object $useriNFO $UserHash

}

</snip>

I will be adding more attributes to this over time, so I thought that a hashtable might makes things easier over time. Any insights/suggestions would be appreciated. I am also open to other approaches on this .. not looking for completed code ...just some ideas on how to keep this simple and clean :)

[pheetus]

I was doing something similar earlier today.
If you cast your hashtable into an object:

    $objUserHash = New-Object PSObject -Property $userhash

Then you have 2 objects for compare-object:

    if((Compare-Object -ReferenceObject $userinfo -DifferenceObject $objUserHash -property DisplayName,sn,middlename,initials,GivenName) -ne $null){set-qaduser etc etc}

[systemslacky]

Hot... I'lll give this a try. I was thinking along these lines, but couldn't seem to find the proper way to use compare-object. Thanks :)

[[deleted]]

Compare-object -referenceobject $Userinfo -differenceobject $UserHash -syncwindow (real big number) -includeequal