Re: [Gambas-user] About arrays
Good morning to all, write this code to see something strange DIM aInt2[1] AS String PRINT IsObject(aInt2) Gambas2-2.21 rev3300 Ubuntu 10.04, AMD64 -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
Re: [Gambas-user] About arrays
2010/11/24 Demosthenes Koptsis demosthen...@gmail.com: Good morning to all, write this code to see something strange DIM aInt2[1] AS String PRINT IsObject(aInt2) Gambas2-2.21 rev3300 Ubuntu 10.04, AMD64 that ? False *** glibc detected *** menudyn: double free or corruption (fasttop): 0x0217beb0 *** So isobject work correctly ... it is not an object ... it's an embedded array. but for the rest ... yes it is not 'normal' -- Fabien Bodard -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
Re: [Gambas-user] About arrays
Good morning to all, write this code to see something strange DIM aInt2[1] AS String PRINT IsObject(aInt2) Gambas2-2.21 rev3300 Ubuntu 10.04, AMD64 I see nothing strange. -- Benoît Minisini -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
Re: [Gambas-user] About arrays
Good morning to all, write this code to see something strange DIM aInt2[1] AS String PRINT IsObject(aInt2) Gambas2-2.21 rev3300 Ubuntu 10.04, AMD64 I see nothing strange. Ah yes, I got the double free error. -- Benoît Minisini -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
Re: [Gambas-user] About arrays
Good morning to all, write this code to see something strange DIM aInt2[1] AS String PRINT IsObject(aInt2) Gambas2-2.21 rev3300 Ubuntu 10.04, AMD64 I see nothing strange. Ah yes, I got the double free error. Mmm. I'm not sure I will be able to fix that in Gambas 2. Gambas 3 should be stronger against that, as embedded arrays are accessed through internal temporary objects (i.e. IsObject(EmbeddedArray) will return TRUE). -- Benoît Minisini -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev ___ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
Re: [Gambas-user] About arrays
Thanks Benoît, i understood the array subject well.
But one note.
i cant do in Gambas2-2.21
PUBLIC aInt2[10] AS Integer
in declaration section of a class
so the syntax
[Static] {Private|Public} EmbeddedArray[A, B] As Type
is it correct, for the Public keyword?
On Tue, 2010-11-23 at 19:13 +0100, Benoît Minisini wrote:
Hi,
This is a clarification about Gambas arrays for Demosthene and all who
answered him.
There are two kinds of arrays in Gambas:
- Normal arrays.
- Embedded arrays.
Fabien used the word static arrays for embedded arrays because this was
the word I used first. Then I changed to embedded to avoid any confusion
with the STATIC keywords, which is not related at all.
Normal arrays are true Gambas objects. They have their own memory
allocation, and they are destroyed when they are not referenced anymore.
To declare a normal array, you can do:
(1) Dim NormalArray As Type[]
(2) Dim NormalArray As Type[] = [ ... ]
(3) Dim NormalArray As Type[] = New Type[A, B]
(4) Dim NormalArray As Type[A, B]
(1) declares an object variable that can receive a reference to a array whose
type is Type[]. Type can be a native datatype or a class name. Note that
in Gambas 2, Type can only be a native datatype.
(2) declares an object variable, and initializes it with a new array created
by the [ ... ] operator.
(3) declares an object variable, and initializes it with a new array hainvg
the specified dimension.
(4) is a shortcut to the (3) syntax.
Embedded arrays are arrays that are allocated *inside* another object. They
don't have a memory allocation on their own, and they are automatically freed
with the object including them.
Embedded arrays are always member of a class or a structure only.
To declare an embedded array, you do the following:
[Static] {Private|Public} EmbeddedArray[A, B] As Type
There, Type is the datatype of one element of the array. There is no []
after the type, unless you want to store array references inside the array of
course.
Embedded arrays can be static or not, public or private.
Embedded arrays are a little bit slower than normal arrays.
They were created to mimic C arrays (like Gambas structures, that were
created
to mimic C structures), so that working with extern C functions using arrays
and structures is possible.
So you should not use them, unless you are working with extern functions.
I hope Gambas arrays are clearer now!
Regards,
--
Regards,
Demosthenes
--
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