PowerShell Toolbox

Toolbox.ps1

<#
.SUMMARY
Restart a list of computers using shutdown.exe.
#>
function Invoke-ComputerRestart {
	[CmdletBinding()]
	param (
	  # List of computers to shutdown
	  [Parameter(ValueFromPipeline = $true)]
	  [string[]]$Computer,
	  # How many seconds to sleep between calls. If 0, calls are made in parallel.
	  [Parameter()]
	  [int] $SleepSeconds = 0
	)

	if ($SleepSeconds -eq 0) {
		Invoke-Command -Computer $Computer -ScriptBlock {
			shutdown /r /t 0
		}
	}
	
	foreach ($comp in $Computer) {
		Invoke-Command -Computer $comp -ScriptBlock {
			shutdown /r /t 0
		}
	}
}

<#
.SUMMARY
Writes a list of items filtering by uniqueness. Does it continuously, can be used for optimizing output on long lists.
#> 
function Show-UniqueItems {
    [CmdletBinding()]
    param (
    	# The list of items to print.
        [Parameter(ValueFromPipeline = $true)]
        [ValidateNotNullOrEmpty()]
        [object]$InputObject
    )

    begin {
        $seenItems = @{}
    }

    process {
        foreach ($item in $InputObject) {
            if (-not $seenItems.ContainsKey($item)) {
                Write-Host $item
                $seenItems[$item] = $true
            }

            Write-Output $item
        }
    }
}