Get-InterarrivalTime.ps1
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function Get-InterarrivalTime { [CmdletBinding()] Param( [Parameter(Mandatory,ValueFromPipeline)] [ValidateNotNullOrEmpty()] [array] $InputObject , [Parameter(Mandatory)] [ValidateNotNullOrEmpty()] [string] $Property , [Parameter()] [ValidateSet('Ticks', 'TotalSecond', 'Minutes', 'Hours', 'Days')] [string] $Unit = 'Ticks' ) Begin { Write-Debug ('[{0}] Entering begin block' -f $MyInvocation.MyCommand) $PreviousArrival = $null } Process { Write-Debug ('[{0}] Entering process block' -f $MyInvocation.MyCommand) $InputObject | ForEach-Object { Write-Debug ('[{0}] Processing value' -f $MyInvocation.MyCommand) if ($PreviousArrival) { Write-Debug ('[{0}] Calculating interarrival time' -f $MyInvocation.MyCommand) Add-Member -InputObject $_ -MemberType NoteProperty -Name "Interarrival$Unit" -Value (New-TimeSpan -Start $PreviousArrival.$Property -End $_.$Property | Select-Object -ExpandProperty $Unit) -PassThru } $PreviousArrival = $_ } } } New-Alias -Name giat -Value Get-InterarrivalTime -Force |