The idea after the Abstract Factory pattern is the notion about our program (or the client of a class we are providing) working with several products (as those in a factory) which have some given characteristics (for example we have bottled products and products in a tetrabrik). Our program is going to use those products performing a couple of actions over them (like putting the bottles in one truck and the tetra briks in another one) without caring about who is actually providing him with the products.
Measure elapsed run time of a code segment
Sometimes we need to know the elapsed time of a method call, that is, how long its taking the code to get run. Usually we suspect the code segment is taking to long to execute and we need to find the bottleneck or maybe we are developing an application with some time restrictions.
There are several functions on the kernel32.dll windows library that may help in this task.
Memory use in Delphi
Getting the real memory use of a process is something far for simple, in the first place because there are no specific functions which retrieve the exact quantity of memory used up by the process, and secondly because it’s difficult to count up which memory belongs to the process and which one doesn’t (for example, a dll is a dynamically loaded library which load only once in memory so that the memory consumed by the dll may or may not be inside what we consider the memory workspace of the process).
Introduction. What is reference couting? Reference counting is a technique that is used when you need to maintain several references to a same place, or more concretely to the same object without having to have several copies of this object in memory. The derived problem of making reference to an object from several places appears…
Abstract classes and interfaces
Abstract classes and methods Generally we understand a pure abstract class as any class having only abstract methods. Method abstraction is a very useful technique to define behavior patterns over the classes that are going to inherit from a given class we are defining. An abstract method is a class method which won’t be implemented…