[DUG] O.o hmmm ok

[Nick]

Right that makes sense :-)
So you could use a pointer then?

example

type
   TMyRec = Record
     name : string;
   end;

var
 a : TMyRec;
 b : ^TMyRec;
begin
 a.name := 'Bob';
 
  b := @a;
  b.name := 'Smile';

  showmessage(a.name); //shows Smile



Judd, Struan (eCargo) wrote:
> Records are constructs with Value semantics whereas Objects have
> Reference semantics.
>
> This means that in the following code is the Assignment 1 and Assignment
> 2 are semantically identical:
>
> Var a, b: record
> 	name: String;
> 	age: Integer;
> 	end;
>
> Begin
> 	a.name := 'Me';
> 	a.age := 39;
>
> //	Assignment 1
> 	b := a;
>
> //	Assignment 2
> 	b.name := a.name;
> 	b.age := a.age;
> End;
>
> TTFN, Struan.
>
> Nick wrote:
>   
>> Got something weird here - weird because I probably don't understand
>> it properly but it caused me a bit of delay... Simplified, I had a
>> global array of records, during my procedure I would do something
>> like this  
>>
>> PRec := MyArrayofPRec[0];
>> PRec.name := 'Hi';
>>
>> Now for some reason I was expecting MyArrayOfPRec[0].name to be now
>> 'Hi' 
>> as well, but it's not.
>>
>> Here is an example that I whipped up just now which lead me to expect
>> this. 
>>
>> type
>>   TMyRec = Record
>>     name : string;
>>   end;
>>
>>
>> var
>>   Form1: TForm1;
>>   TTH : TMyRec;
>>
>> procedure TForm1.FormCreate(Sender: TObject); begin
>>   TTH.name := 'BoB';
>> end;
>>
>> procedure TForm1.Button1Click(Sender: TObject); var
>>   t : TMemo;
>>   b : TMyRec;
>> begin
>>   t := Memo1;
>>   t.lines.add('hi');
>>
>>   b := TTH;
>>   b.name := 'Smile';
>>   t.lines.add(TTH.name);
>> end;
>>
>> Now in this example when it's ran and button 1 is clicked - Hi is
>> added to the Memo1 and Bob is added. 
>> So why can I assign Memo1 to T and all actions done to T are done to
>> Memo1, but the same isn't with the Record. 
>> Is it because Record isn't from TObject?
>> I guess it's like
>> var
>>     a,b : integer;
>> begin
>>     a := 1;
>>     b := a;
>>     b := 10; //a still = 1 which is what I would expect end;
>>
>> so is it because TMemo is an Object and the record and a,b above are
>> just variables? 
>>
>> O.o
>> Thanks
>>
>>
>>
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