>
> Bad example because Val() is a special case ! Val() function work with some
> help from the compiler, this way you can pass either an integer or a
> floating point variable as the second argument.
>
Oups i'm not lucky... :-)
> There is nothing in Delphi which is "nothing" for an integer or a floating
> point value.The closest is using variant instead of simple data types. A
> variant can be
> empty.You can also use a pointer.
Yes, yesterday.. i had an idea and it's was working...
I''ve used this and it's work fine :
Val(S, Integer(myV), myCode)
I don't know if it is the best way :-)
but thanks for this good info !
> Sorry but I don't clearly understand what you intend to do.
> Could you explain again, and give a complete example, even if it doesn't
> compile because of syntax error.
I've just got a component code on the net :
and because the Numcheck var is never used, i was trying to understand
why...
function TTestGrid.Sort : Boolean;
Var
CheckForNum, NumCheck, NumErr : Integer;
begin
ErrorCode := 0;
...
For CheckForNum := FStartIndex TO FEndIndex DO Begin
If FHowToSort = stRow Then
Val(Cols[FSortIndex].Strings[CheckForNum],NumCheck,NumErr)
else
Val(Rows[FSortIndex].Strings[CheckForNum],NumCheck,NumErr);
End;
...
end;
Cédric
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