Eachin loop with array and modifying that array

BlitzMax Forums/BlitzMax Beginners Area/Eachin loop with array and modifying that array

Pakz	(Posted 2016) [#1]

How do you modify the array with a eachin loop? In the new part I try to write into the array but it does not register it. Is it needed to use the regular for loop for this to work?


Graphics 640,480

Type test
	Field val:Int[]
	Method New()
		val = New Int[10]
		Local cnt=0
		For Local i:Int = EachIn val
			i = cnt
			cnt=cnt+1
		Next
	End Method
	Method draw()
		Local x:Int=100
		Local y:Int=100
		SetColor 255,255,255
		For Local i:Int=EachIn val
			DrawText i,x,y
			y=y+15
		Next
	End Method
End Type

Local t:test =New test
While Not KeyHit(KEY_ESCAPE)
	Cls
	t.draw()
	Flip
Wend

Derron

(Posted 2016) [#2]

I think the problem might be the fact that it is an int-array, so it is not passed "by reference" (like in an "eachin list").

Best you can do is:

For local i:Int = 0 until val.length
  val[i] = cnt
  cnt :+ 1
Next

bye
Ron

Pakz	(Posted 2016) [#3]

Thanks.

You also showed me how to add with the :+ and shown me that there is a until to be used with the for command.

I just started using bmax. Bought the beginners book on ibooks(only 7 euro :))