PowerShell Pipeline Programming Style sample

PipelineExecutionStyles.ps1

function PipelineExecuteOnEndProcessingStyle
{
    param
    (
        [parameter(Position = 0, Mandatory = 1, ValueFrompipeline = 1, ValueFromPipelineByPropertyName = 1)]
        [string]$hostaddress
    )
    begin{ $hostaddresses = @() }
    process
    {
        # まとめる
        foreach ($h in $hostaddress){ $hostaddresses += $h } 
    }
    end
    {
        # まとめてとばす
        Execute;
    }
}


function PipelineExecuteOnEveryProcesseingStyle
{
    param
    (
        [parameter(Position = 0, Mandatory = 1, ValueFrompipeline = 1, ValueFromPipelineByPropertyName = 1)]
        [string]$hostaddress
    )
    begin{ $hostaddresses = @() }
    process
    {
        # 毎回の入力でとばす
        foreach ($h in $hostaddress) {$hostaddresses += $h; Execute; }
    }
}

function Execute
{
    # なんか処理
}