Question Function Alias

#ClosureExample.ps1 Bruce Payette
#
# Object === data + code
#
# Closure === code + data
#
#
# Function factory - returns closures that scale their argument
# by the the value of $x
#
function scale ($x)
{
$sb = {param($y) $x * $y}
$sb.GetNewClosure()
}
#
# Define a scale-by-5 scriptblock...
#
$by5 = scale 5
1..10 | foreach { & $by5 }
#
# Define an actual function
#
$function:by5 = scale 5
#
# And use it ...
by 3
#
# Fancier function - uses "advanced function" metadata...
#
function New-ScaleFunction{
  param (
    [parameter(Mandatory=$true)]
    [string]
    $functionName,
    [parameter(Mandatory=$true)]
    [int]
    $scaleFactor
  )

  # "Advanced" scriptblock
  $sb = {
    param (
    # Can read value from pipeline as well as command line...
    [parameter(ValueFromPipeline=$true,Mandatory=$true)]
    [int]
    $valueToScale
    )
    process { $valueToScale * $scaleFactor }
  }
  # Define a scale function at the global scope...
  Set-Item "function:global:$functionName" $sb.GetNewClosure()
}

New-ScaleFunction by4 4
by4 10
1..10 | by4

 #En interne la closure mémorise la variable locale $Name au sein d'un module ("caché")
function File($name)
{
$sb = {param() Get-Item $Name }
$sb.GetNewClosure()
}

#test
'Test' >'c:\temp\test.txt'

#création de la fonction qui mémorise le nom désiré
$MonFichier= File 'c:\temp\test.txt'

#On appel du code qui renvoi un objet fichier
&$MonFichier