I think this example could help you to clarify the usefulness of the Module Pattern. Module Pattern The module pattern is widely used because it provides structure and helps organize your code as it grows. Unlike other languages, JavaScript doesn’t have special syntax for packages, but the module pattern provides the tools to create self-contained … Read more
There is a book called Clean Code by Robert Martin that covers this. In Chapter 6 (Objects and Data Structures) he talks about fundamental differences between objects and data structures. Objects benefit from encapsulation, data structures don’t. There is a section about the Law of Demeter: There is a well-known heuristic called the Law of … Read more
Vince Huston Design Patterns, even though its layout is poor, has C++ implementation for most design patterns in the Gang of Four book. Click for Decorator. There isn’t much difference with Java, except the manual memory handling that you’d better wrap with smart pointers 🙂
There are two solutions to your question that don’t involve keeping all classes in the same package. The first is to use the Friend Accessor/Friend Package pattern described in (Practical API Design, Tulach 2008). The second is to use OSGi. Related Questions: 1, 2, 3, and 4.
The article claims it is using the “registry design pattern”; is that the universal name for this design in the industry? Yes, but the implementation could obviously differ. Basically, a registry is a container for shared objects. In the really basic version, you could use an array. As such, the variable $GLOBALS could be called … Read more
I like, in decreasing preference: passkey friend idiom passkey-door friend idiom pass-door friend idiom key-door friend idiom partial-friend idiom restricted-friend idiom I moved away from the key-lock/key-keyhole naming scheme to the pass naming scheme, which grew on me.
In anything other than the most straightforward scenario — a single main form running for the lifetime of the application, with short-lived child forms — it is recommended to create a class that inherits from ApplicationContext. It isn’t that complicated: class FormManager : ApplicationContext { //When each form closes, close the application if no other … Read more
BridgePattern decouples an abstraction from its implementation. Abstraction and Implementation can vary independently since the concrete class does not directly implement Abstraction ( interface) Implementation never refers Abstraction. Abstraction contains Implementation interface as a member (through composition). Coming back to your question regarding the example code in [journaldev][4] article : Shape is Abstraction Triangle is … Read more
UPDATE Flask 2 was released with support for nested blueprints. [ START: Part from the docs ] Nesting Blueprints It is possible to register a blueprint on another blueprint. parent = Blueprint(‘parent’, __name__, url_prefix=’/parent’) child = Blueprint(‘child’, __name__, url_prefix=’/child’) parent.register_blueprint(child) app.register_blueprint(parent) The child blueprint will gain the parent’s name as a prefix to its name, … Read more
Some background, MVC is a (compound) design pattern and was developed in 1979 by Trygve Reenskaug (Smalltalk). True MVC was primarily planned for use in n-tier (non web) systems and it splits a system into 3 distinct parts, a Model, View and Controller The Model Contains data for the application (often linked to a database) … Read more