powershell functions

powershell_functions.ps1

# Function
function F {}
F


# ScriptBlock
& ({})
({}).Invoke()


# PSScriptMethod
$m = New-Module -ScriptBlock {
  $val = "Hello"
  function Say {
    $Script:val += "+"
    $val
  }
} -AsCustomObject
$m.Say() # Hello+
$m.Say() # Hello++
$m.Say() # Hello+++


# PSMethod
class foo {
  static [int]bar() { return 1 }
}
[foo]::bar()


## Delegate
([Action]{
  Write-Host 1
  Write-Output 2
}).Invoke()

([Func [int]]{ }).Invoke()
([Func [int, bool]]{ $args[0] -ge 5 }).Invoke(1000)