Reuse when developing software

When I first learned to object-oriented, I saw that the introduction would refer to the use of inheritance to reuse the property methods of the parent class. So it feels like it's time to make the code as reusable as possible, not just for the subclass of the parent class, but also to be useful in other projects.

I want to write my own reusable modules, functions on GitHub, so that the previous efforts to save the results, and then a treasure trove.

Suddenly think that the framework does not already provide a variety of methods? I should get to know these methods and then go to the application, which is also reusable AH! Use your own other people's call reuse!

The programming language does not already provide many functions, various class libraries? Hurry up and reuse!

At this time only to realize the idea of the silly, do not want to learn to master the function, to use when checking the good.

Functions are tools, bricks, cement, rebar ...

Reuse when developing software