The Art of Programming
Post Date : 2022-10-29T18:16:57+07:00
Modified Date : 2022-10-29T18:16:57+07:00
Topics to be discussed are anything about concepts in programming
- Imperative programming vs Declarative programming
- Aspect Oriented Programming
Imperative programming vs Declarative programming
Functional Programming is a declarative programming paradigm, in contrast to imperative programming paradigms.
Declarative programming is a paradigm describing WHAT the program does, without explicitly specifying its control flow.
Imperative programming is a paradigm describing HOW the program should do something by explicitly specifying each instruction (or statement) step by step, which mutate the program’s state.
Making a chocolate cake
The imperative way
- First, turn on the oven to preheat it at 180°C.
- Next, add flour, sugar, cocoa powder, baking soda and salt to a large bowl, then stir the mixture with a paddle.
- Then, add milk, vegetable oil, eggs and vanilla extract to the mixture, and mix together on medium speed until well combined.
- Distribute the cake batter evenly in a large cake pan, then bake it for approx. 30 minutes.
- Remove the pan from the oven with a pot holder, let it cool for 10 minutes.
- Finally, remove the cake from the pan with the tapping method, and frost it evenly with chocolate frosting.
The declarative way
- You have to preheat the oven to 180 °C.
- You have to mix dry ingredients in a bowl.
- Once dry ingredients are mixed, you have to add wet ingredients to the mixture, and mix together to form the cake batter.
- Once the oven and batter are ready, you have to put the batter in a pan, then bake it for 30 minutes.
- Once baked, you have to remove the pan from the oven and let it cool for 10 minutes.
- Finally, you have to remove the cake from the pan, and frost it.
Aspect Oriented Programming
- Aims to increase modularity by allowing the separation of cross-cutting concerns.
- It does so by adding behavior to existing code (an advice) without modifying the code itself, instead separately specifying which code is modified via a “pointcut” specification, such as “log all function calls when the function’s name begins with ‘set’”.
Interceptors have a set of useful capabilities which are inspired by the Aspect Oriented Programming (AOP) technique. They make it possible to:
- bind extra logic before / after method execution
- transform the result returned from a function
- transform the exception thrown from a function
- extend the basic function behavior
- completely override a function depending on specific conditions (e.g., for caching purposes)