How do programmers practice code reuse

Question

I\'ve been a bad programmer because I am doing a copy and paste. An example is that everytime i connect to a database and retrieve a recordset, I will copy the previous code and

Answer 1

At first, create a library with reusable functions. They can be linked with different applications. It saves a lot of time and encourages reuse.

Also be sure the library is unit tested and documented. So it is very easy to find the right class/function/variable/constant.