Functions vs Methods

Monkey Forums/Monkey Programming/Functions vs Methods

vicente

(Posted 2012) [#1]

So, I'll start a few newbie questions from now on.. first: Whats the difference between Functions and Methods?

slenkar

(Posted 2012) [#2]

methods are part of a class, functions are global

methods can be overridden by other classes that extend the original class

vicente

(Posted 2012) [#3]

I'm trying to call the method "update" of class Player from OnUpdate, but i got the following error when i run (it builds w/o error):

Monkey Runtimer Error : TypeError: Cannot call method 'm_update' of null


Global player:Player

...

Method OnUpdate:Int()	
	player.update()	
	Return 0
End

...

Class Player

	Method update:Void()


	End
	
	Method render:Void()

	End

End

If I change Method update:void() to Function update:void() it works, but i can't access class variables.

What could be wrong?

c.k.	(Posted 2012) [#4]

Try something like

[monkeycode]
Global player:Player = New Player
[/monkeycode]

You could also put it in your OnCreate method.

[monkeycode]
Global player:Player

Method OnCreate:VOID()
player = New Player
End Method
[/monkeycode]

Probably.

vicente

(Posted 2012) [#5]

I already have player = New Player on "onCreate" method

Origaming

(Posted 2012) [#6]

it's strange

Monkey Runtimer Error : TypeError: Cannot call method 'm_update' of null

is cause you are not called
[monkeycode]player = New Player[/monkeycode]

take a look

Import mojo
Global player:Player

Function Main()
	New test
End

Class test Extends App
	Method OnCreate()
		SetUpdateRate 30
		player = New Player
	End
	Method OnRender()
		Cls
		player.render()
	End
	Method OnUpdate()
		player.update()
	End
End

Class Player
	Method render:Void()
		DrawText("test", 0, 0)
	End
	Method update:Void()
		Print "test"
	End
End

Samah

(Posted 2012) [#7]

@slenkar: methods are part of a class, functions are global

Careful with your terminology there. Global functions are not the same as static functions. Static functions also belong to a class, but they don't require an instance to call them.