Habits Quote by Steve McConnell
““Global data is generally subject to two problems: routines operate on global data without knowing that other routines are operating on it, and routines are aware that other routines are operating on the global data but they don't know exactly what they're doing to it.””
About This Quote
Source Book: Code Complete, 1993
Global data sharing creates hidden risks: unaware concurrent access and unclear modifications.
In simple terms: Shared data can be risky.
Key Takeaway
Implement clear data access controls.
Themes
software engineering
concurrency
risk management
Mood
technical
pragmatic
Type
educational
instructive
When to use this quote
- multithreaded programming
- database management
- team coordination
Key Concepts
systems design
data integrity
Questions to Reflect On
- How do you track data changes?
- What safeguards prevent race conditions?
A Different Perspective
Complex systems may still suffer from hidden bugs.
![“[It's] useful to ask ourselves, 'Just how global are we?' before we think about where we go from here.” quote by Pankaj Ghemawat](https://sms4smile.com/quotes/img-quotes/a04/pankaj-ghemawat-70598_asks_it-s-useful-to-ask-ourselves-just-how-gl_1845620.jpg)
![“[...] you shouldn't be uneasy about any parts of the architecture. It shouldn't contain anything just to please the boss. It shouldn't contain anything that's hard for you to understand. You're the one who'll implement it; if it doesn't make sense to you, how can you implement it?” quote by Steve McConnell](https://sms4smile.com/quotes/img-quotes/0a6/steve-mcconnell-11957_architecture_you-shouldn-t-be-uneasy-about-any-parts_574744.jpg)
