Do I need to setLength a dynamic array on initialization?

Question

type Tmyclass = class(TObject)
  somearray: array of TSometype
  FBool: Boolean;
  Fint: Integer;
  Fstr: string;
  constructor Create;
  destructor Destroy; overrid         


        

Answer 1

As the other answerers have said, you do not need to initialize class member fields.

You also asked about local variables. Yes, you do need to initialize those. All of them, except variables of one of the managed types:

• AnsiString
• UnicodeString
• WideString
• an interface type
• dynamic array type
• Variant

List taken from Barry Kelly's answer that Sertac pointed out in the comments: Which variables are initialized when in Delphi?