Read Ruby metaprogramming and ruby metaprogramming

Read Ruby metaprogramming and ruby metaprogramming
Using many spells and Ruby's programming skills to implement many clever programming:
Array parameters
Surrounding alias
Whiteboard
Class Extension
Class Extension
Class instance variables
Class macros
Clean Room
Code Processor
Context probes
Delayed execution
Dynamic Distribution
Dynamic Method
Dynamic proxy
Flat Scope
Ghost Method
Hook method
Kernel Method
Inertia instance variable
Anthropomorphic Method
Monkey Patching
......
The above advanced skills are used to implement more concise programming (only the total number of rows) for convenient modification.
A file contains thousands of lines.
You need to understand the basics of Ruby.
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