codeblog code is freedom — patching my itch

1/9/2005

Fragile Code

Filed under: Embedded — kees @ 7:27 pm

I define fragile code as code that isn’t easily changed without introducing bugs. I think the biggest cause of fragile code is cut/paste algorithms. This is especially true for data access and processing routines.

The idea behind Object Oriented programming is that you end up creating accessor functions for all your data. It’s simple to change your data formats without breaking the program as a whole. When you don’t have an OO language, you create all kinds of methods to do your repeated work.

This is critically important for stable, readable, sane code. Functions should do something small, and do it very well. Then you can call a whole series of strong little functions, rather than cutting and pasting the same code over and over, only to wreck your day much later on.

© 2005, Kees Cook. This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 License.
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