The cheat sheet designpatternscard.pdf was downloaded via Internet and annotated by myself. Copyright reserved by the original creator.

design_patterns_code.md showing typical codes represents how design patterns work was partly coded by myself. Some of them maybe cannot compile properly. Hence understanding what codes means and why are they coded in this way was NO.1 on agenda considering you are hastily reviewing Design Patterns.

Hopefully there will be someone find my fault, please make me aware in any way. Issue and pull request are both acceptable. Also, you can add my SNS account:

QQ: 1304093121

WeChat: 17361825184

This repo follows the opensource license WTFPL.

Do whatever U want to.