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Design patterns are ways to solve a problem and the way to get your intended result in the best possible manner. So, design patterns are not only ways to create a large and robust system, but they also provide great architectures in a friendly manner.
In software engineering, a design pattern is a general repeatable and optimized solution to a commonly occurring problem within a given context in software design. It is a description or template for how to solve a problem, and the solution can be used in different instances. The following are some of the benefits of using design patterns:
If you are not familiar with design patterns, the best way to begin understanding is observing the solutions we use for commonly occurring, everyday life problems.
Let’s take a look at the following image:
Many different types of power plugs exist in the world. So, we need a solution that is reusable, optimized, and cheaper than buying a new device for different power plug types. In simple words, we need an adapter. Have a look at the following image of an adapter:
In this case, an adapter is the best solution that’s reusable, optimized, and cheap. But an adapter does not provide us with a solution when our car’s wheel blows out.
In object-oriented languages, we the programmers use the objects to do whatever we want to have the outcome we desire. Hence, we have many types of objects, situations, and problems. That means we need more than just one approach to solving different kinds of problems.
The following are the elements of design patterns:
Design patterns are generally divided into three fundamental groups:
Let’s examine these in the following subsections.
Creational patterns are a subset of design patterns in the field of software development; they serve to create objects. They decouple the design of an object from its representation. Object creation is encapsulated and outsourced (for example, in a factory) to keep the context of object creation independent from concrete implementation. This is in accordance with the rule: “Program on the interface, not the implementation.”
Some of the features of creational patterns are as follows:
The following patterns are called creational patterns:
In software engineering, design patterns structure patterns facilitate easy ways for communications between various entities.
Some of the examples of structures of the samples are as follows:
Behavioral patterns are all about a class’ objects’ communication. Behavioral patterns are those patterns that are most specifically concerned with communication between objects. The following is a list of the behavioral patterns:
If you want to check out the usage of some patterns in the Laravel core, have a look at the following list:
In this article, we have explained the fundamentals of design patterns. We’ve also introduced some design patterns that are used in the Laravel Framework.
Further resources on this subject:
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