Technique to minimise mistake

[Nakata kokuyo]

hi, good day , i always make mistake when i do coding, mistake like
- forgot do validation (for date, number field)
- testing not good enough, and user easily get error when use the application
- application not match to domain logic
- and so on for coding(web)


is that anyway to improve these ? thank you for guidance

[Michal Harezlak]

Originally posted by Nakata kokuyo:

- forgot do validation (for date, number field)
- testing not good enough, and user easily get error when use the application
- application not match to domain logic
- and so on for coding(web)


is that anyway to improve these ? thank you for guidance

Hello,
If I could make my self immune to these problems I would probably be a famous person already.

However it seems that TDD, Unit testing and design by contract could be of help to you in regard to concerns 1 and 2. When it comes to 3. It seems that you could try to develop and manage your requirements or/and use XP's "on site customer".

For Design by contract see:
http://archive.eiffel.com/doc/manuals/technology/contract/

For Unit testing.
http://www.codeproject.com/gen/design/onunittesting.asp
http://www.junit.org/index.htm

For XP:
http://www.extremeprogramming.org/rules.html

Regards