Delphi → Example - Abstract Factory in Delphi

abstract, шаблоны проектирования, Delphi

This pattern is ideal where you want to isolate your application from the implementation of the concrete classes. For example if you wanted to overlay Delphi's VCL with a common VCL layer for both 16 and 32 bit applications, you …

Design Patterns → Generative Design Patterns - Object Pool

шаблоны проектирования, object, pool

Goals

Object pooling can greatly improve performance; it is most effective in situations where the cost of initializing an instance of a class is high and the rate of instantiation of the class is high, while the number of instances …

Java → Example - Abstract Factory in Java

abstract, Java

Abstract Factory classes are often implemented with Factory Methods, but they can also be implemented using Prototype. Abstract Factory might store a set of Prototypes from which to clone and return product objects.

• Factory Method: creation through inheritance.
• Prototype: creation …

PHP → Example - Abstract Factory in PHP

abstract, PHP

An example of a design pattern An abstract factory in PHP

<?php
/*
 *  Abstract Factory classes
 */

abstract class DB_Abstraction_Factory {
    protected $settings = array();
    protected function __construct() {
        $this->settings = Settings::getInstance();
    }

    abstract public function createInstance();
}

class …

Design Patterns → Generative Design Patterns - Factory Method

шаблоны проектирования, abstract, cpp

Goals

• We define an interface for creating an object, but let the subclasses decide which class to create. A factory method allows you to instantiate a class for subclasses.
• Definition of a "virtual" constructor.
• The new operator is harmful.

Problems …

EVILEG → Adding initial support for photos and photo albums

EVILEG, Развитие

The weekend was not in vain. For a couple of days, I managed to write enough functional support for uploading photos through the WYSIWYG website editor. What I would like to inform the users of the site in the form …

Design Patterns → Generative Design Patterns - Builder

Builder, шаблоны проектирования, Строитель

The reasons

• Separating the construction of a complex object from its representation so that the same construction process can create different representations.
• Dismantling a complex representation, creating one goal from several variations.

Problems

Separation of the object interpretation algorithm (for …

Python → Example - Abstract Factory in Python

abstract, factory, abc, python

An example of an abstract factory in the Python programming language

"""
Provide an interface for creating families of related or dependent
objects without specifying their concrete classes.
"""

import abc


class AbstractFactory(metaclass=abc.ABCMeta):
    """
    Declare an interface for operations that …

C++ → Example - Abstract Factory in C ++

cpp, шаблоны проектирования, abstract, new

Discussion. "Think of object creation as a factory that spawns those same objects."

Here we assign object creation responsibilities to the factory object, and then use inheritance functions and virtual members to provide a "virtual constructor" capability. So there are …

Design Patterns → Generative Design Patterns - Abstract Factory

шаблоны проектирования, абстрактная, abstract, new, фабрика

The reasons

• Providing an interface for creating families of related or dependent objects without specifying their specific classes.
• Hierarchy that encapsulates: many possible "platforms" and building a set of "products".
• The new operator is considered harmful.

Problems

If an application …

Linux → Bash script for creating and downloading a dump of a database and media files from a remote server

Bash, rsync, Linux

During the development of the site on Django had to start to understand the Bash scripts to automate routine tasks. For example, creating and downloading a database dump from a site, as well as reserving media files.

We assume that …

Linux → Counting the number of commits for authors in Git

Git, Fun, Linux

Just for fun.

What can programmers measure? Of course, with their commits, at least their number in the Git repository.

To do this, you can use the git shortlog command, which summarizes the output of git log, providing a more …