Why is it useful to have and learn so many different design patterns?
Even if you never encounter these problems, knowing patterns is still useful because it teaches you how to solve all sorts of problems using principles of object-oriented design. Design patterns define a common language that you and your teammates can use to communicate more efficiently.
Why we should learn design patterns?
If you’ve encountered design patterns only in passing, in a nutshell, they’re general object-oriented solutions that you can use in your own designs. Crafted by experienced object-oriented practitioners, design patterns can make your designs more flexible, more resilient to change, and easier to maintain.
Why design patterns often lead to more complex solutions with a greater number of distinct classes?
Design patterns often lead to additional levels of abstraction around a problem, and if not handled correctly then too much abstraction can lead to complexity. However, since design patterns provide a common vocabulary to communicate ideas they also reduce complexity and increase maintainability.
What are the benefits of having design pattern?
Design patterns help you write code faster by providing a clearer picture of how you are implementing the design. Design patterns encourage code reuse and accommodate change by supplying well-tested mechanisms for delegation and composition, and other non-inheritance based reuse techniques.
Why are patterns needed?
Patterns make our task simpler. Problems are easier to solve when they share patterns, because we can use the same problem-solving solution wherever the pattern exists. The more patterns we can find, the easier and quicker our overall task of problem solving will be.
Are design patterns hard?
Design patterns are a great concept that are hard to apply from just reading about them. Take some sample implementations that you find online and build up around them. A great resource is the Data & Object Factory page. They go over the patterns, and give you both conceptual and real world examples.