In our previous episode, Ludo Brands said:
When you are thinking of using JSON you can use AnsiString as the
internal format eventually adding a datatype tag to avoid
conversion
data loss as much as possible.
ansistring is a decimal type. This incurs a binary to decimal
conversion
The reason for using a buffer in tdataset is that a record's data normally
is located in one continuous buffer, from which a value is picked from the
right spot (including strings) You can't have that with variants.
Hm... right.
So, if I will have a class like a TParam, that have FValue:
On Sat, Mar 3, 2012 at 3:26 AM, Ludo Brands ludo.bra...@free.fr wrote:
I need implements a similar structure but I need know if
the use of
Variant have very cost.
It has a cost.
The reason for using a buffer in tdataset is that a record's data
normally is located in one continuous
On Sat, Mar 3, 2012 at 9:25 AM, Alberto Narduzzi
albertonardu...@yahoo.com wrote:
The reason for using a buffer in tdataset is that a record's data
normally
is located in one continuous buffer, from which a value is picked from
the
right spot (including strings) You can't have that with
Think in my class like a Business Object.
The struct is very similar with TParams it has many TParam. The data,
in a TParam, is save in a Variant type.
I need something like:
u := TmyBO.Create; // the name does matter
u.Attr['name'].Value := 'Marcos'; // an instance is created and the
On Sat, Mar 3, 2012 at 11:52 AM, Ludo Brands ludo.bra...@free.fr wrote:
Think in my class like a Business Object.
The struct is very similar with TParams it has many TParam. The data,
in a TParam, is save in a Variant type.
I need something like:
u := TmyBO.Create; // the name does matter
On 3/3/2012 10:08, Marcos Douglas wrote:
Think in my class like a Business Object.
The struct is very similar with TParams it has many TParam. The data,
in a TParam, is save in a Variant type.
I need something like:
u := TmyBO.Create; // the name does matter
u.Attr['name'].Value := 'Marcos';
2012/3/3 Luiz Americo Pereira Camara luiz...@oi.com.br:
On 3/3/2012 10:08, Marcos Douglas wrote:
Think in my class like a Business Object.
The struct is very similar with TParams it has many TParam. The data,
in a TParam, is save in a Variant type.
I need something like:
u := TmyBO.Create;
On Sat, Mar 3, 2012 at 12:57 PM, silvioprog silviop...@gmail.com wrote:
2012/3/3 Luiz Americo Pereira Camara luiz...@oi.com.br:
On 3/3/2012 10:08, Marcos Douglas wrote:
Think in my class like a Business Object.
The struct is very similar with TParams it has many TParam. The data,
in a
Or define an internal storage format and convert the
different types
to that format. That is also what variants are doing. The
difference
is that variants have pre-defined assignment routines and
conversions
between the different variant types which don't always fit what you
On Sat, Mar 3, 2012 at 1:20 PM, Ludo Brands ludo.bra...@free.fr wrote:
Or define an internal storage format and convert the
different types
to that format. That is also what variants are doing. The
difference
is that variants have pre-defined assignment routines and
conversions
between
In our previous episode, Ludo Brands said:
When you are thinking of using JSON you can use AnsiString as the internal
format eventually adding a datatype tag to avoid conversion data loss as
much as possible.
ansistring is a decimal type. This incurs a binary to decimal conversion per
se
On Fri, 2 Mar 2012, Marcos Douglas wrote:
On Wed, Feb 29, 2012 at 10:38 PM, Marcos Douglas m...@delfire.net wrote:
Hi,
The TField class have the FValueBuffer: Pointer attribute and have
also SetData(Buffer: Pointer,...) method that all T***Field subclasses
use to set themselves.
The methods
On Fri, Mar 2, 2012 at 1:02 PM, michael.vancann...@wisa.be wrote:
On Fri, 2 Mar 2012, Marcos Douglas wrote:
On Wed, Feb 29, 2012 at 10:38 PM, Marcos Douglas m...@delfire.net wrote:
Hi,
The TField class have the FValueBuffer: Pointer attribute and have
also SetData(Buffer: Pointer,...)
I need implements a similar structure but I need know if
the use of
Variant have very cost.
It has a cost.
The reason for using a buffer in tdataset is that a record's data
normally is located in one continuous buffer, from which a value is
picked from the right spot
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