Jump to content
Sign in to follow this  

Towards approximating a 'yield' statement

Recommended Posts


Not the most useful thing as it is not feature complete, but a fun experiment nonetheless.

Edit: What does it do? Well, it attempts to approximate the yield statement found in other languages, i.e. Ruby and C#. The purpose of the yield statement is to give control to a specified function from within the called function's body. Some security limitations - as well as my own intelligence limitations - make this example more of a conceptual example than fully functional. But oh well.

Why did I place it here? Perhaps some poor soul will find themselves trapped under mounds of maintenance code, much of which relies on repetitious looping and iterating. Perhaps it will spark a better implementation. Who knows. That's the beauty of these forum thingys.

#include <WinAPI.au3>

Func Iterator( $loop, $yield )  
    Local $errorFlag = 0
    For $i in $loop
        if ( IsObj( $i ) ) Then
            $command = StringFormat( "%s ( $item )", $yield )
            ConsoleWrite( $command & @CRLF ) 
            Call( $yield, $i )
            If @error <> 0 then $errorFlag = @error
            $command = StringFormat( $yield, $i )           
            ConsoleWrite( $command & @CRLF ) 
            Execute( $command )
            If @error <> 0 then $errorFlag = @error
    SetError( $errorFlag )

#region Example Functions
; The following are example functions that will be called by the Iterator function

Func ShowMeFromArray( $msg )
; Helo Werldz
    MsgBox(0, "ShowMeFromArray", $msg )

Func TwoToThePowerOf( $exponent )
; Display two to the power of a supplied exponent
    MsgBox(0, "TwoToThePowerOf", 2 ^ $exponent  )

Func ShowMeFromCollection( $item )  
; Some kind of window-releated activity is simulated here
; Because of AutoIts restrictions against window-operations
; proceeding from Call'ed, Execute'd statements - we'll use 
; the WinAPI include to achieve the desired result.
    MsgBox(0, "ShowMeFromCollection", "Press 'OK' to maximize " & $item.LocationName  ) 
    _WinAPI_ShowWindow( $item.HWND, @SW_MAXIMIZE )
    MsgBox(0, "ShowMeFromCollection", "Press 'OK' to minimize " & $item.LocationName  ) 
    _WinAPI_ShowWindow( $item.HWND, @SW_MINIMIZE )
    SetError( 1 )


Dim $test = StringSplit( "1,2,3", "," )
Iterator( $test, 'ShowMeFromArray( "%s" )' )
Iterator( $test, 'TwoToThePowerOf( "%s" )' )
ConsoleWrite( @error & @CRLF)

$oShell = ObjCreate("shell.application")
Iterator( $oShellWindows, "ShowMeFromCollection" )
ConsoleWrite( @error & @CRLF)
Edited by zfisherdrums
  • Like 1

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this  


Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.