Map and data contained

[rossati]

Hello

I found a behavior that seems me incorrect i.e. I have a map where every items is an array. When I take an element and I edit this, the changes also happens on the map:

For i=0 To nElem -1
field = Elem.Get(i)
Log("******************** " & field(3))
If Right(field(3),1) = "M" Then field(3) = Left(field(3),field(3).Length-1)
field = Elem.Get(i)
Log("++++++++++++++++++++ " & field(3))
-----------------

The log is:

******************** TM
++++++++++++++++++++ T
******************** B
++++++++++++++++++++ B
******************** T
++++++++++++++++++++ T
******************** NM
++++++++++++++++++++ N
******************** DNM
++++++++++++++++++++ DN

Why this?

Best regards

John Rossati

 

[warwound]

Have a read of this thread: http://www.b4x.com/forum/basic4andr...ariables-objects-basic4android.html#post46951.

When you get an array from the Map you are getting a reference to the array and NOT a copy of the array.

The changes to the referenced array are made to the original array.

Martin.