PowerShell Advanced Functions

help about_Functions_Advanced
help about_Functions_CmdletBindingAttribute
help about_Functions_OutputTypeAttribute
help about_Functions_Advanced_Methods

高级函数的功能类似于 cmdlets，可以理解为用 PowerShell Script 实现的 cmdlets。

以这篇文章里面的脚本为例 https://www.petri.com/testing-empty-folders-with-powershell

[cmdletbinding()]

[OutputType([String])]

function Send-Greeting {
    [CmdletBinding()]
    [OutputType([String])]

    Param(
        [Parameter(Mandatory=$true)]
        [string] $Name
    )

    Process {
        write-host ("Hello " + $Name + "!")
    }
}

(Get-Command Send-Greeting).OutputType

stage	cmdlet	advanced function
create pipeline	BeginProcessing() method	Begin block
emit a object	ProcessRecord() method	Process block
finish	EndProcessing() method	End block