Unusual Data Types

最新推荐文章于 2025-06-27 02:20:57 发布

原创最新推荐文章于 2025-06-27 02:20:57 发布 · 881 阅读

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#types #variables #object #list #user

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博客介绍了结构体的作用，如明确数据关系、简化数据操作等。同时指出全局数据存在意外修改、别名问题等常见问题，也说明了使用全局数据的原因，如保存全局值等，还给出了降低使用全局数据风险的方法，如制定命名规范等。

Structures
1. Use structures to clarify data relationship.
2. Use structures to simplify operations on blocks of data.
3. Use sturctures to simplify parameter lists.
4. Use structures to reduce maintenance.

Global Data
Common problems with global data
1. Inadvertent changes to global data
2. Bizarre and exciting aliasing problems with global data.
3. Re-entrant code problems with global data.
4. Code reuse hindered by global data.
5. Uncertain initization-order issues with global data.
6. Modularity and intellectual manageability damaged by global data.

Reason to user global data
1. Preservation of global values.
2. Emulation of named constants.
3. Streamlining use of extremely common data.
4. Eliminating tramp data.

How to reduce the risks of using global data
1. Develop a naming convention that makes global varables obvious.
2. Create a well-annotated list of all your global variables.
3. Don't use global variables to contain intermediate results.
4. Don't pretend you're not using global data by putting all yoru data into a monster object and passing it everywhere