PowerShell: How can I add a result to array or Collection after a pipeline command?-CodePudding

Good day, I´m relativly new to PowerShell, I come from C# and need to know something special.

How can I add the output of a pipeline into an existing array?

I do something like that example:

$FirstCollection = New-Object System.Collections.ArrayList
foreach ($item in $OtherCollection) {
    if ($item -ne "blabla") {
        $result | 
        Where-Object { ($_.ID -Match 1) } |
        Group-Object -Property id, LevelDisplayName, LogName -NoElement | 
        Sort-Object -Property count -Descending |
        **This output must going into the $FirstCollection**
    }

    if ($item -ne "bliblablubb") {
        $result | 
        Where-Object { ($_.ID -Match 1) } |
        Group-Object -Property id, LevelDisplayName, LogName -NoElement | 
        Sort-Object -Property count -Descending |
        **This output must going into the $FirstCollection as well**
    }
}

How the cow should I add the last output into an array. The array can also be a simple $array = @()

I need this, because after the foreach i have to output the array entries into a file. After the last pipe I get a Count, a value and a string and i need all outcomes line by line among themselves.

If do output directly after the pipline with Out-File... I´m getting something like this:

Count Name                                                               
----- ----                                                               
   69 123, someText, someMoreText
Count Name                                                               
----- ----                                                               
   50 456, someText, someMoreText
Count Name                                                               
----- ----                                                               
   25 789, someText, someMoreText

But I need:

   Count Name                                                               
    ----- ----    
     69 123, someText, someMoreText 
     50 456, someText, someMoreText
     25 789, someText, someMoreText

Can anybody help me to get this crap working, please?

Thanks a lot!!

CodePudding user response：

To add to an ArrayList in PowerShell, you do not pipe. Rather you use the ArrayList.Add() function or simply = (just like in C#).

$FirstCollection = New-Object System.Collections.ArrayList
foreach ($item in $OtherCollection) {
    if ($item -ne "blabla") {
        $FirstCollection  = $result | 
            Where-Object { ($_.ID -Match 1) } |
            Group-Object -Property id, LevelDisplayName, LogName -NoElement | 
            Sort-Object -Property count -Descending
    }

    if ($item -ne "bliblablubb") {
        $FirstCollection  = $result | 
            Where-Object { ($_.ID -Match 1) } |
            Group-Object -Property id, LevelDisplayName, LogName -NoElement | 
            Sort-Object -Property count -Descending
    }
}

I believe this also works with $FirstCollection = @().