Updating information in .CSV file - ongoing report

Question

i have a script im running that gives me a report of machines currently available on the network and exports that information to a .csv file 
What im trying to accomplish is AFTER the initial run of the script if the script runs again and the machine is available i would like that cell to update with AVAILABLE as opposed to writing a whole new line item.
I hope thats a clear explanation. I'm assuming if i use the -append flag it will create new line items which im trying to stay away from as i'm sure this will come in handy when running some dynamic html reporting pages
here is my current script
Function get-mdtbuiltcomputers {
    param (
        [string[]]$computername='localhost'
    foreach($comp in $computername){
        $p=[ordered]@{
            Computername=$comp
            Status='Unavailable or not a Standard MDT Image'
            MDTImageDate=$null
        $path=Test-Path "\\$comp\c$\Windows\smsts.ini"
        $connected = Test-Connection -quiet -count 2 -delay 2 -ComputerName $comp
        if($path -and $connected){
            $file=Get-ChildItem \\$comp\c$\Windows\smsts.ini
            $p.Status='Available'
            $p.MDTImageDate=$file.CreationTime
         New-Object PsObject -Property $p
when i run it from my console i use:
get-mdtbuiltcomputers -computername xxxxxxx | export-csv c:\mdt.csv -notypeinformation
Rich Thompson

Answer 1

Hint:
if($p=$csv|?{$_.ComputerName -eq $comp}){
$reuse=$true
}else{
$p=[ordered]@{
Computername=$comp
Status='Unavailable or not a Standard MDT Image'
MDTImageDate=$null
if(-not $reuse){
# append to existing CSV
}else{
# do nothing
¯\_(ツ)_/¯