Allows the pipeline'd "foreach" to be assigned a value other than $_

foreachas.ps1

function foreachas {

    Param(
        [char]$as,
        [ScriptBlock]$sb
        )

    PROCESS {
        Set-Variable -Name $as -Value $_
        Invoke-Command -ScriptBlock $sb
    }

}

Set-Alias fea foreachas

"A","B","C" | fea "x" {
  "1","2","3" | fea "y" {
    "Letter $x, Number $y"
  }
}