Dec 23, 2025 · 4 min read · 關於LSP 接下來進到L了，這裡的L指的就是里氏替換原則 (LSP , Liskov Substitution Principle)，這是許多後端工程師覺得最「抽象」的一個原則，但它其實是判斷「繼承 (Inheritance) 是否被濫用」最重要的標準。 什麼是里式替換 (LSP)？ 「子類別 (Subclass) 必須能夠替換掉它們的父類別 (Base Class)，且程式的行為不會發生錯誤。」 簡單來說，如果程式碼依賴於一個父類別（或介面），那麼隨便塞一個該父類別的「子類別」進去，程式都...
Join discussionFeb 25, 2025 · 8 min read · Dependency Injection (DI) and Dependency Inversion (DIP) are two key concepts in software development that often get confused. While they’re related, they focus on different things. Dependency Injection deals with how objects get their dependencies, ...
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Jan 23, 2025 · 2 min read · Hello everyone, This post is about a principle that has changed the way I approach software development. Imagine you’re building your dream app, and everything is going great. Until… you decide to switch your database or integrate a new API. Suddenly...
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Jan 12, 2025 · 2 min read · 什麼是依賴反轉？ 💡 本文涵蓋多個技術細節，但關鍵重點是「依賴反轉就是依賴抽象」。 「業務邏輯」和「實作細節」兩端都依賴抽象業務邏輯 ➡️ 抽象介面 ⬅️ 實作細節 用手作甜點店比喻依賴關係 舉例來說：你經營一家手作甜點店 (業務邏輯/Domain層)： 需要食材來製作甜點 但你不親自去買 告訴採購部需求(Repository介面) 採購部會： 選擇供應商可能是批發市場、農場直送、進口等 買到食材(實作Repository) 這樣設計的好處 你可以專注在做甜點，你...
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Jan 10, 2025 · 3 min read · Abstracted Payment Gateway using Inteface interface PaymentGateway{ pay(amount:number):void } Single Responsiblity Principle (SRP): A class should have only one reason to change or should handle one action Handles logging of payment activiti...
Join discussionOct 25, 2024 · 4 min read · Dependency Inversion Principle in Laravel Have you ever struggled with tightly coupled code that's difficult to maintain and test? The Dependency Inversion Principle (DIP) is here to save the day! In this guide, we'll explore how DIP can make your La...
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Aug 26, 2024 · 3 min read · In an era where data breaches cost companies an average of $4.35 million per incident, and with 68% of business leaders feeling their cybersecurity risks are increasing, it's clear that data protection isn't just IT jargon—it's a business imperative....
Join discussionAug 25, 2024 · 2 min read · In SOLID, "D" stands for the Dependency Inversion Principle (DIP). This principle is about reducing the dependency of high-level modules on low-level modules by abstracting the connections between them. Key Concepts: High-level modules should not de...
Join discussionAug 24, 2024 · 5 min read · In this blog post, we will explore the fifth and final principle in the SOLID design principles series: the Dependency Inversion Principle (DIP). In case you missed the previous posts in this series, you can catch up here: Single Responsibility Prin...
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Aug 9, 2024 · 7 min read · In the world of software development, adhering to best practices can significantly enhance the quality and maintainability of your code. One such set of best practices is the SOLID principles. SOLID is an acronym for five design principles that help ...
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