Chapter 4. Troubleshooting Tcl applications
It is not uncommon for a developer to eagerly start to write a code, then to realize the brilliant idea that just came to your mind. You quickly implement the basics of the program and add functionalities one by one, each time running the code to check if it works as you wish. So far so good, but eventually you come to the point when adding additional functionality breaks existing functions for no obvious reason. Suddenly, your fast development stops because instead of coding you are reviewing sources and adding printouts, wherever possible, to get an idea what could have gone wrong.
Does that sound familiar? Well, you are not the only one who faces such problems. Luckily there are some well-known techniques to speed up investigation of the problem, and make it as less painful as possible. These techniques are logging and debugging.
The concept of logging is similar to adding printouts to your code, but in a more ordered and unified way. At runtime...
