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Noviceatthis

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Noviceatthis

Hello all

sorry for asking such a bogstandard question, but I've been struggling with this since I started learning this language

Func max($x, $y)
If $x > $y Then
Return $x
Else
Return $y
EndIf
EndFunc

in the script above, why the use of the parameters after the the max function, would the below script not just do the same??

Func max()
If $x > $y Then
Return $x
Else
Return $y
EndIf
EndFunc

again, sorry for the basic level of the question, suppose it reflects my understanding :P

P. S. It's not just this script I have a problem with, it's the use of parameters in general

Edited by Noviceatthis

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nitekram

Your first example allows you to use the script FUNCTION many times, with different values.

The second one will run, and unless the two variables are global and are changed outside the function - it will return the same results, each time.

Edited by nitekram

All by me:

"Sometimes you have to go back to where you started, to get to where you want to go." 

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From my dad

"Do not worry about yesterday, as the only thing that you can control is tomorrow."

 

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PhoenixXL

Check if this example helps you out

Global $x = 10, $y = 2

Func max_g()
If $x > $y Then Return $x
Return $y
EndFunc   ;==>max_g

Func max_l($x, $y) ;<<<<<<<< The $x and $y are the local paramteres not the global one
If $x > $y Then Return $x
Return $y
EndFunc   ;==>max_l

MsgBox( 0, @ScriptName, max_g()) ; Returns $x(global)
MsgBox( 0, @ScriptName, max_l(2, 20))  ;Returns $y (local - 2nd parameter)

$x = 5 ;change the value of global vars
$y = 5
MsgBox( 0, @ScriptName, max_g()) ;Returns $y(global)


My code:

PredictText: Predict Text of an Edit Control Like Scite. Remote Gmail: Execute your Scripts through Gmail. StringRegExp:Share and learn RegExp.

Run As System: A command line wrapper around PSEXEC.exe to execute your apps scripts as System (LSA). Database: An easier approach for _SQ_LITE beginners.

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Noviceatthis

thanks nitekram and PhoenixXL, I just seem to have a mental block when it comes to this topic, I will get my head round it :P

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Noviceatthis

got it now, thanks again :)

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nitekram

Glad you got a hold of it. I have found it hard to make a function with variables reusable, but once you learn how to really take advantage of this, it will help make for quick work out of your projects.

One more thing about parameters and calling functions with them. DEFAULT values. In fact you can have a default value for every parameter you have in your function. All defaults must be last in your list of variables in your function calls. So in the case you are looking at, say $y had a value of 3.14159 (Pi) and wanted to use that value most of the time - then you could call it like below.

; borrowed code ;)

Global $x = 10, $y = 2

Func max_g()
If $x > $y Then Return $x
Return $y
EndFunc ;==>max_g

Func max_l($x, $y = 3.14159) ;<<<<<<<< The $x and $y are the local paramteres not the global one, $y has a default 3.14159
If $x > $y Then Return $x
Return $y
EndFunc ;==>max_l

MsgBox( 0, @ScriptName, max_g()) ; Returns $x(global)
MsgBox( 0, @ScriptName, max_l(2, 20)) ;Returns $y (local - 2nd parameter)
MsgBox( 0, @ScriptName, max_l(0)) ;Returns $y (local - 2nd parameter), but you only called it with one parameter
$x = 5 ;change the value of global vars
$y = 5
MsgBox( 0, @ScriptName, max_g()) ;Returns $y(global)
Edited by nitekram

All by me:

"Sometimes you have to go back to where you started, to get to where you want to go." 

"Everybody catches up with everyone, eventually" 

"As you teach others, you are really teaching yourself."

From my dad

"Do not worry about yesterday, as the only thing that you can control is tomorrow."

 

WindowsError.gif

WIKI | Tabs; | Arrays; | Strings | Wiki Arrays | How to ask a Question | Forum Search | FAQ | Tutorials | Original FAQ | ONLINE HELP | UDF's Wiki | AutoIt PDF

AutoIt Snippets | Multple Guis | Interrupting a running function | Another Send

StringRegExp | StringRegExp Help | RegEXTester | REG TUTOR | Reg TUTOT 2

AutoItSetOption | Macros | AutoIt Snippets | Wrapper | Autoit  Docs

SCITE | SciteJump | BB | MyTopics | Programming | UDFs | AutoIt 123 | UDFs Form | UDF

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ControlHover.UDF

GDI_Plus

Draw_On_Screen

GDI Basics

GDI_More_Basics

GDI Rotate

GDI Graph

GDI  CheckExistingItems

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Replace $ghGDIPDll with $__g_hGDIPDll

DLL 101?

Array via Object

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GDI Examples UEZ

GDI Basic Clock

GDI Detection

Ternary operator

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guinness

Everyone is aware that _Max & _Min are in the standard includes? I would have just looked at them for learning purposes.


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Updated: 22/04/2018

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nitekram

Yes, I was just using OP example.


All by me:

"Sometimes you have to go back to where you started, to get to where you want to go." 

"Everybody catches up with everyone, eventually" 

"As you teach others, you are really teaching yourself."

From my dad

"Do not worry about yesterday, as the only thing that you can control is tomorrow."

 

WindowsError.gif

WIKI | Tabs; | Arrays; | Strings | Wiki Arrays | How to ask a Question | Forum Search | FAQ | Tutorials | Original FAQ | ONLINE HELP | UDF's Wiki | AutoIt PDF

AutoIt Snippets | Multple Guis | Interrupting a running function | Another Send

StringRegExp | StringRegExp Help | RegEXTester | REG TUTOR | Reg TUTOT 2

AutoItSetOption | Macros | AutoIt Snippets | Wrapper | Autoit  Docs

SCITE | SciteJump | BB | MyTopics | Programming | UDFs | AutoIt 123 | UDFs Form | UDF

Learning to script | Tutorials | Documentation | IE.AU3 | Games? | FreeSoftware | Path_Online | Core Language

Programming Tips

Excel Changes

ControlHover.UDF

GDI_Plus

Draw_On_Screen

GDI Basics

GDI_More_Basics

GDI Rotate

GDI Graph

GDI  CheckExistingItems

GDI Trajectory

Replace $ghGDIPDll with $__g_hGDIPDll

DLL 101?

Array via Object

GDI Swimlane

GDI Plus French 101 Site

GDI Examples UEZ

GDI Basic Clock

GDI Detection

Ternary operator

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