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    <p>First of all what is IOC? It means that responsibility of creating the dependent object is taken away from the main object and delegated to third party framework. I always use spring as my IOC framework and it bring tons of benefit to the table.</p> <ol> <li><p><strong>Promotes coding to interface and decoupling</strong> - The key benefit is that IOC promotes and makes decoupling very easy. You can always inject an interface in your main object and then use the interface methods to perform tasks. The main object does not need to know which dependent object is assigned to the interface. When you want to use a different class as dependency all you need is to swap the old class with a new one in the config file without a single line of code change. Now you can argue that this can be done in the code using various interface design patterns. But IOC framework makes its walk in a park. So even as a newbie you become expert in levering various interface design patterns like bridge, factory etc.</p></li> <li><p><strong>Clean code</strong> - As most of object creation and object life-cycle operations are delegated to IOC container you saved from the writing broiler point repetitive code. So you have a cleaner, smaller and more understandable code. </p></li> <li><p><strong>Unit testing</strong> - IOC makes unit testing easy. Since you are left with decoupled code you can easily test the decoupled code in isolation. Also you can easily inject dependencies in your test cases and see how different component interacts. </p></li> <li><p><strong>Property Configurators</strong> - Almost all the applications have some properties file where they store application specific static properties. Now to access those properties developers need to write wrappers which will read and parse the properties file and store the properties in format that application can access. Now all the IOC frameworks provide a way of injecting static properties/values in specific class. So this again becomes walk in the park.</p></li> </ol> <p>These are some of the points I can think right away I am sure there are more.</p>
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    1. POArguments against Inversion of Control containers
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    1. USNiraj Singh
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