博客介绍了设计模式，指出其包含模式名称、目的、实现方式及需考虑的约束等4项内容。还阐述了学习设计模式的动机，如复用解决方案、建立通用术语等。此外，提到GoF提出的面向对象设计策略，包括面向接口设计、优先组合而非继承等。
What is Design Patterns?
“A solution to a problem in a context” - Christopher Alexander
A pattern involves 4 items
- The name of the pattern
- The purpose of the pattern, the probem it solves
- How we could accomplish this
- The constraints and forces we have to consider in order to accomplish it
Motivations for studying Design Patterns
- Resue solutions
- Establish common terminology
- Help raise the level of your thinking
In the third point: Patterns give you a higher-level perspective on the problem
and on the process of design and object orientation. This frees you from the
tyranny of dealing with the details too early.
The GoF suggests some strategies for creating good OO designs
- Design to interfaces
- Favor composition over inheritance
- Find what varies and encapsulate it
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