Solved

how to initialize array

Posted on 1998-07-18
3
203 Views
Last Modified: 2010-04-04
Hello.

I want to know how to initialize array.

(ex)
type
TForm1 = class(TForm)
..
private
..
public
..
end;

var
  arrayA: array[0..2] of Integer := (0,1,2);

It's Ok.But when array is class member, compile error occurs.

type
TForm1 = class(TForm)
..
private
m_arrayA: array[0..2] of Integer := (0,1,2);
..
public
..
end;

So I have to program as follows.

type
TForm1 = class(TForm)
..
private
m_arrayA: array[0..2] of Integer;
..
public
..
end;
..
procedure TForm1.FormCreate;
begin
m_arrayA[0] := 0;
m_arrayA[1] := 1;
m_arrayA[2] := 2;
end;

This code is very ugly.
I want to initialize array like C or Java.

Please teach me a good method.

Sakya
0
Comment
Question by:sakya
  • 2
3 Comments
 
LVL 4

Accepted Solution

by:
erajoj earned 50 total points
ID: 1358149
Here's an approach, a bit less ugly, or...?

type
  TMyIntArray = array[ 0..3 ] of Integer;
  TForm = class(TForm)
  ...
  private
    m_arrayA: TMyIntArray; // prevent "Incompatible types" error
  ...
  end;

var (or const, whatever you prefer...)
  rgiIntermediate: TMyIntArray = ( 0, 1, 2, 3 );

procedure TForm1.FormCreate;
begin
  m_arrayA := rgiIntermediate;
end;


This really doesn't shorten your code, but looks a bit better.

/// John
0
 

Author Comment

by:sakya
ID: 1358150
Thanks for your answer.
But is this  Delphi's limit???

Sakya


0
 
LVL 4

Expert Comment

by:erajoj
ID: 1358151
I think so.
Not even C++ can initialize member vars in the class descr. It has to be done in the constructor or later (unless static-decl?), but you probably already knew that?
Object Pascal's strong typing is sometimes a pain in .... This has other great advantages however.
If you are initializing huge structures; use datafiles, the registry or load the data from your resources as binary data. If you want to do so, and don't know how, ask again...

Regards,
/// John
0

Featured Post

Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

A lot of questions regard threads in Delphi.   One of the more specific questions is how to show progress of the thread.   Updating a progressbar from inside a thread is a mistake. A solution to this would be to send a synchronized message to the…
Introduction The parallel port is a very commonly known port, it was widely used to connect a printer to the PC, if you look at the back of your computer, for those who don't have newer computers, there will be a port with 25 pins and a small print…
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question