[Gambas-user] Variable ByVal

[sakya]

Ciao Leonardo!

> It is very strange for me, because all the operations are made on 
> matrix[], which gets its datas from matrice2[], not directly from 
> matrice[].
>
It's normal. :-)
The line:

matrice2 = matrice

Doesn't copy the matrix in a new variable, it only "links" matrice to 
matrice2.
Every changes made on matrice are made also on matrice2 (they are tha 
same variable!)

In this example you'll see "d" also in a:

  DIM a AS NEW String[]
  DIM b AS NEW String[]
 
  a.Add("a")
  a.Add("b")
  a.Add("c")
 
  b = a
  b.Add("d")
  message(a.Join())

To copy a matrix you must do:
    matrice2 = matrice.copy()

In this example you won't find "d" in a:

  DIM a AS NEW String[]
  DIM b AS NEW String[]
 
  a.Add("a")
  a.Add("b")
  a.Add("c")
 
  b = a.Copy()
  b.Add("d")
  message(a.Join())

Ciao
Paolo

	

	
		
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