Pipeline input

Using the Parameter attribute to set either ValueFromPipeline or ValueFromPipelineByPropertyName sets a parameter up to fill from the input pipeline.

About ValueFromPipeline

ValueFromPipeline allows the entire object to be passed into a parameter from an input pipeline. The following function implements an InputObject parameter, which accepts pipeline input by using the ValueFromPipeline property of the Parameter attribute:

function Get-InputObject {
    [CmdletBinding()]
    param (
        [Parameter(Mandatory, ValueFromPipeline)]
        $InputObject
    )

    process {
        'Input object was of type {0}' -f $InputObject.GetType().FullName
    }
}

Remember that values read from an input pipeline are only...