#ObjectPascalNotes

Whenever you call an API for a given platform in your Object Pascal code you lose the ability to recompile the application for any other platform than the specific one. The exception is if the call is surrounded by platform specific

$IFDEF

compile directives.

https://www.youtube.com/watch?v=3tQ9KDpGsRQ

This sounds great!!!

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#ObjectPascalNotes

type
  TAllYearTemps = array [1..24, 1..31, 1..12] of Integer;

var
  AllYear: TAllYearTemps;

Static arrays immediately take up a lot of memory (in the case above on the stack), which should be avoided. The AllYear variable requires 8,928 Integers, taking up 4 bytes each, this is almost 35KB. Allocating such a large block in the global memory of on the stack is really a mistake. A dynamic array, instead, uses the heap memory, and offers much more flexibility in terms of memory allocation and management.

#ObjectPascalFeatures

var 
  di: array of Integer;
  i: Integer;

begin
  di := [1, 2, 3];       // initialization
  di := di + di;         // concatenation
  di := di + [4, 5];   // mixed concatenation

  for i in di do
  begin
     Show(i.ToString);
  end;

end.

These features to dynamic arrays were added in Delphi XE7