ExChange columns with rows in powershell - powershell

Question

after a couple of hours I need a help with PS script.
I have an array where :
computername Folder Size
PC1 A 123
PC1 B 18
PC1 C 356
PC2 A 589
PC2 B 58
PC2 C 59
PC2 D 89
I need somehow exchange the columns with rows where result will be as following:
Folder_A Folder_B Folder_C Folder_D
PC1 123 18 356
PC2 589 58 59 89
Can you help me with that ?

Answer 1

If we assume $array does contain your array of objects with the properties specified in your columns, you can do the following:
$output = $array | Group-Object computername | Foreach-Object {
$hash = [ordered]#{Computer=$_.Name}
$_.Group | Foreach-Object {
$hash.Add(('Folder_'+$_.Folder),$_.Size)
}
[pscustomobject]$hash
}
}
$output | Format-List
$output will contain an array of objects. Since those objects will likely have different properties, you may have display issues in your console. For example, PC1 will not have Folder_D and since it is the first item in the array, the default output for all remaining objects will be missing Folder_D. This is why I added the Format-List command, which should be used for display purposes only and not for further processing.
Regarding missing columns in the output, you have a couple of options. One, you can sort your objects to where the one with the most properties is first in the list. Two, you can use additional logic to predetermine your full list of properties and then apply those properties to all objects. See below for predetermining the folder list:
$Folders = $array.Folder | Select -Unique
$output = $array | Group-Object computername | Foreach-Object {
$hash = [ordered]#{Computer=$_.Name}
foreach ($Folder in $Folders) {
$hash.Add(('Folder_'+$Folder),$null)
}
$_.Group | Foreach-Object {
$hash.$('Folder_'+$_.Folder) = $_.Size
}
[pscustomobject]$hash
}
$output | Format-Table