Static Variable

Monkey Forums/Monkey Beginners/Static Variable

wiliamtn

(Posted 2014) [#1]

Hi everybody

Is there static variable in monkey?

I have been trying to make some exemples that need this type of variable, but i do not found nothin about this.

ziggy

(Posted 2014) [#2]

What's a static variable? isn't it a Const? Static variable sounds like a contradiction to me

dawlane

(Posted 2014) [#3]

What's a static variable?

A variable that is still resident in memory; meaning a variable that still exists and is accessible when created within a function or class instance. A variable defined as global within a class could be considered a static variable.
C/C++ Use of the static keyword.

Edit: You can not define globals within loops, functions or methods.

Strict

Class StaticClass
	Global createdByNew:Int
	Global createdByFunction:Int
	
	Method New()
		createdByNew += 1
	End Method
	
	Function CreateByFunction:Void()
		createdByFunction +=1
	End Function
	
	Function GetStaticNew:Int()
		Return createdByNew
	End Function
	
	Method GetStaticFunction:Int()
		Return createdByFunction
	End method
	
End Class

Function Main:Int()
	Local static:StaticClass = New StaticClass
	Print "Created new instance to local static variable"
	New StaticClass
	New StaticClass
	Print "Created two instances by New"
	StaticClass.CreateByFunction()	
	StaticClass.CreateByFunction()
	StaticClass.CreateByFunction()
	StaticClass.CreateByFunction()
	Print "Created four instances by calling static function"
	Print "Retrieved New via using static function " + StaticClass.GetStaticNew()
	Print "Retrieved Function via using local variable method" + static.GetStaticFunction()
	Print "Retrieved New via direct access " + StaticClass.createdByNew
	Print "Retrieved Function via direct access " + StaticClass.createdByFunction
	Return 0
End Function

Midimaster

(Posted 2014) [#4]

In VB a "Static" is a variable which is "Global only inside a function": Inside the function it is defined and outside not. But whenever you return back to your function the value is still known:

if it would exist...

Do
    Test
Loop

Function Test()
     Static A%
     A=A+1
     Print A
End

would give this result:

1
2
3
...

There is nothing comparable in Monkey. You could use an combination of Class and Function to simulate it:

Do
    Test.It
Loop

Class Test
     Global A%
     Function It()
          A=A+1
          Print A
     End
End