B4J Question Variable size arrays

[drponciano]

Am I missing something? I'm having trouble with an array of bytes. I declare variable x as Dim x(10000) as byte in Process Globals. When running the program I eventually get a ArrayIndexOutOfBoundsExeption error with an index in x well below the size, say x(i), where i=1113. If I log(x.length) I get different sizes during the process and, of course! when x.length is less than the index (say 1113) the error occurs. Is x(10000) of variable size? How can I get it fixed size?

 

[LucaMs]

Probably somewhere in your project you declared x again, with fewer elements. Press F7 on the variable name to find all the references to that variable.

How can I get it fixed size?

Arrays are resizable.


A good idea could be... to use better variable names

 

[Erel]

Arrays are resizable.

More correct to say that arrays can be redeclared with a new size.

Sounds to me that you should use BytesBuilder: https://www.b4x.com/android/forum/threads/89008/#content

 

[drponciano]

Well, variable name is not x, I used x as an example. The variable is decalerd only once in Process Globals en used in a AsyncStreamDataAvailable.

 

[drponciano]

More correct to say that arrays can be redeclared with a new size.

Sounds to me that you should use BytesBuilder: https://www.b4x.com/android/forum/threads/89008/#content

I declare the variable only once in Process Globals and use it during AsyncStreamDataAvailable routine. I'm trying to copy part of the input buffer to this global array. The problem occurs randomly. I'll try to use BytesBuilder but, I think, shouldn't be neccesary.

 

[drponciano]

After a good night sleep things look clearer. My mistake. Sometimes, depending on the data flow, I copy part of the input buffer to x with a FOR loop but, some other times, I copy the whole buffer with x=inputbuffer and... thas was the error! That statement redefines x with same size as inputbuffer! Thanks for your help. Good morning, afternoon or night wherever you are.