Join arrays in PowerShell similar to concatenating DataFrame columns - powershell

Question

Is there a way to join arrays in PowerShell similar to concatenating DataFrame columns in Python Pandas with concat or in R with cbind rather than iterating through every item?
Below is a reproducible example that binds four arrays together as four columns in a PowerShell object. How would I get rid of the for loop and get the same results?
$LogicalProcessors = (Get-WmiObject –class Win32_processor
-Property NumberOfLogicalProcessors).NumberOfLogicalProcessors;
function myTop([String]$SortCol='CPU', [Int32]$top=30) {
$NameArray = get-counter '\Process(*)\ID Process' -EA SilentlyContinue |
Select -Expand CounterSamples | Select InstanceName, CookedValue
$CpuArray = get-counter '\Process(*)\% Processor Time' -EA SilentlyContinue |
Select -Expand CounterSamples | Select CookedValue
$MemArray = get-counter '\Process(*)\Working Set - Private' -EA SilentlyContinue |
Select -Expand CounterSamples | Select CookedValue
$TopTable = For ($i=0; $i -lt $NameArray.Length; $i++) {
if ($NameArray[$i].InstanceName -eq '_total') {continue}
if ($NameArray[$i].InstanceName -eq 'memory compression') {continue}
if ($NameArray[$i].InstanceName -eq 'idle') {
$CPU = ($CpuArray[$i].CookedValue) / $LogicalProcessors;
} else {
$CPU = $CpuArray[$i].CookedValue;
}
[PSCustomObject]#{
Name = $NameArray[$i].InstanceName;
ID = $NameArray[$i].CookedValue;
CPU = $CPU;
Memory = $MemArray[$i].CookedValue;
}
}
$TopTable | sort -des $SortCol | select -f $top |`
select Name, ID,`
#{Name='CPU'; Expression = {("{0:N1}%" -f $_.CPU) } },`
#{Name='Memory'; Expression = {("{0:N0} K" -f ($_.Memory /1kb) )} }
}
myTop -SortCol Memory -top 30 | ft -a

Answer 1

I think PowerShell doesn't provide a way to combine columns. In this case, it can correspond by Group-Object.
function myTop([string]$SortCol = "CPU", [int]$Top = 30)
{
$LogicalProcessors = (Get-WmiObject Win32_processor NumberOfLogicalProcessors).NumberOfLogicalProcessors
Get-Counter '\Process(*)\ID Process','\Process(*)\% Processor Time','\Process(*)\Working Set - Private' -ea SilentlyContinue |
foreach CounterSamples |
where InstanceName -notin "_total","memory compression" |
group { $_.Path.Split("\\")[3] } |
foreach {
[pscustomobject]#{
Name = $_.Group[0].InstanceName
ID = $_.Group[0].CookedValue
CPU = if($_.Name -eq "idle") { $_.Group[1].CookedValue / $LogicalProcessors } else { $_.Group[1].CookedValue }
Memory = $_.Group[2].CookedValue / 1KB
}
} |
sort -des $SortCol |
select -f $Top #(
"Name","ID"
#{ n = "CPU"; e = { ("{0:N1}%" -f $_.CPU) } }
#{ n = "Memory"; e = { ("{0:N0} K" -f $_.Memory) } }
)
}
myTop -SortCol Memory -top 10 | ft -a