Master and Student
Master: Grasshopper, tell me what you have learned of the Object-Oriented ways.
Student: Master, I have learned that the promise of the OO way is reuse.
M: Grasshopper, continue…
S: Master, through inheritance all good things may be reused and so we will come to drastically cut development time like we swiftly cut bamboo in the wood.
M: Grasshopper, is more time spend on code before or after development is complete?
S: The answer is after, Master. We always spend more time maintaining and changing software than initial development.
M: So Grasshopper, should effort go into reuse above maintainability and extensibility?
S: Master, I believe that there is truth in this.
M: I can see that you still have much to learn. I would like for you to go and meditate on inheritance further. As you’ve seen, inheritance has its problems, and there are other ways of achieving reuse.