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#DesignPatterns #OOP
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Design Patterns - Explained Simply 💎
Author : Alexander Shvets 🖊
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#Book #DesignPatterns
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Head First Design Patterns 📕

Authors : Bert Bates, Kathy Sierra, Eric Freeman, Elisabeth Robson 🖊

Publisher : O'Reilly 💎

Level : Advanced 🔝

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#Book #DesignPatterns
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Architecting Services with Design Patterns 💎

As the number of your services expands you're going to need to start thinking about how to organize them. 🗂

Applying these two design patterns can help, provided you understand all their variations. ✅

With the current set of tools that come with the Microsoft .NET Framework, it's easy to create a service. ⚙️

But it's also easy to create what both Nayaki Nayyar and Benjamin Moreland described as a "junk drawer of services." 👾

If you're going to avoid that as the number of services in your organization increases, then you need to think about your architecture. 🤔

https://t.me/pgimg/95

[ Article ] : http://bit.do/asdp

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#CleanCode #DesignPatterns
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A Pattern is a solution to a problem in a context. ✅

We're going to step throught each of these parts, context, problem and solution ✨ :

The context is the situation in which the pattern applies. This should be a recurring situation. 👨🏻‍🔧

The problem refers to the goal you are trying acheive in this context, but it also refers to any constraints that occur in the context. 🏆

The solution is what you're after : a general design that anyone can apply which resolves the goal and set of constraints. 🏅

➖ Example
Problem: How do I get to work on time❓

Context: I've locked my keys in the car. 🗝

Solution: Break the window, get in the car, start the engine and drive to work. 🚗

"If you find yourself in a context with a problem that has a goal that is affected by a set of constraints, then you can apply a design that resolves the goal and constraints and leads to a solution."

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#DesignPatterns #Tips
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If you don't need it now, don't do it now❗️

Design Patterns are powerful, and it's easy to see all kinds of ways they can be used in your current designs.⚡️

Developers naturally love to create beautiful architectures that are ready to take on change from any direction.💙

If you have a practical need to support change in a design today, go ahead and employ a pattern it handle that change. ✅

However, if the reason is only hypothetical, don't add the pattern, it is only going to add complexity to your system, and you might never need it. ❌

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#DesignPatterns #Tips
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Object Thinking 📙

Author : David West 🖋

Level : Advanced 💎

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#Book #DesignPatterns #OOP
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Objects Should Be Immutable 🤫

In object-oriented programming, an object is immutable if its state can’t be modified after it is created. 🤞🏻

In Java/C#, a good example of an immutable object is String.✅
Once created, we can’t modify its state. We can request that it creates new strings, but its own state will never change. ❌

However, there are not so many immutable classes in JDK. Take, for example, class Date. It is possible to modify its state using setTime(). 🕒

This is an incomplete list of arguments in favor of immutability ⚡️:

• Immutable objects are simpler to construct, test, and use
• Truly immutable objects are always thread-safe
• They help to avoid temporal coupling
• Their usage is side-effect free (no defensive copies)
• Identity mutability problem is avoided
• They always have failure atomicity
• They are much easier to cache
• They prevent NULL references, which are bad

Let’s discuss the most important arguments one by one. 🌀


https://t.me/pgimg/178

[ Article ] : kutt.it/immtb

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#BestPractices #DesignPatterns
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Design Patterns for Humans 🤷🏻‍♂️

Design patterns are solutions to recurring problems; guidelines on how to tackle certain problems. ✅

They are not classes, packages or libraries that you can plug into your application and wait for the magic to happen. ❌

These are, rather, guidelines on how to tackle certain problems in certain situations. ✨


[ C# Version ] : kutt.it/dp-cs
[ PHP Version ] : kutt.it/dp-php

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#DesignPatterns #Patterns
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