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First dependency Inversion Principle(DIP) and second Inversion of Controls(IoC). Using abstractions (i.e., interfaces in Go) was intuitive to me. Dependency inversion principle is one of the principles on which most of the design patterns are build upon. Secondly, abstractions should not depend upon details. once we have discussed these two, we will be in a better position to understand Dependency Injection, so we will look at dependency injection in details. let us start our discussion with DIP, then we will talk about IoC. The idea of high level and low level modules categorises classes in a hierarchical manner. Then finally we will discuss see how can we implement Dependency injection. It focuses on the approach where the higher classes are not dependent on the lower classes instead depend upon the abstraction of the lower classes. Both should depend on abstractions. The Dependency Inversion Principle (DIP) states that high level modules should not depend upon low level modules. Abstraction should not depend upon details. Let's take an example of a simple Customer Management example. Details should depend on abstractions." D stands for DIP ( Dependency inversion principle) Originally compiled by Robert C. Martin back in the 1990s, these principles provide a way to construct software components that are tightly coupled code with poor cohesion and little encapsulation to the complete opposite; loosely coupled code, cohesive and truly encapsulating the real needs of the business appropriately. Dependency inversion principle; At that time, I couldn't get the last one: the dependency inversion principle. The main motto of the dependency inversion … Dependency inversion talks about the coupling between the different classes or modules. If you see the source code, we are connecting to MySQL and performing CRUD operations for the customer. Dependency Inversion Principle Example. Details should depend upon abstractions. Robert C. 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