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checking if im still in the array

Monkey Forums/Monkey Beginners/checking if im still in the array

adekto(Posted 2014) [#1]
i have to deal with allot of array's and i want to check if my operation landed me outside the array. i try to do checking for Null but i get compile error that null isnt an int or null isnt float


ziggy(Posted 2014) [#2]
Post an.example and we'll be able to help much better


Pharmhaus(Posted 2014) [#3]
Like this?
Strict

Function Main:Int()
	
	Local myArray:Int[] = New Int[20]
	
	Print "Number of elements :" + myArray.Length
	
	For Local i:Int = 0 Until myArray.Length '<<< from 0 to the last array element (exclusive)
		Print myArray[i]
	Next
	
	Local x:Int = 20
	
	If x < myArray.Length Then ' Check if the index x is within the array bounds
		Print "Inside!"
	Else
		Print "Outside"
	EndIf
	
	Return 0
End



adekto(Posted 2014) [#4]



Gerry Quinn(Posted 2014) [#5]
Checking for null won't work. There is nothing at a non-existent array element, not even null! Acccessing it should give a runtime error.

Check that the array index is within the array Length(s).

If that's too inefficient and you want to do fake 'pointer arithmetic' with indexes. put guard values at the edges and test for them. (Or find an algorithm that will never go outside the array.)


adekto(Posted 2014) [#6]
ok im using an aditional array to put all the array's size's in, that kinda work. thx