The wheel should not be invented again

"Do not reinvent the wheel" Believe in everyProgramI have never heard of a sentence from a senior.Famous sayingHowever, I think this predecessor must be a pragmatic.

If we just use it, we don't have to bother to implement all our functions. If we have a good implementation, we can use it. The cost of learning and using is much lower than the cost of new development. However, if you want to learn a skill or skill, it is impossible to rely solely on the knowledge in books. You must do it first. Only when it is realized can you understand its mysteries. In order to learn better, we need to compare with the existing implementation so that we can find our gap. Imitating excellent implementations is a way of learning. After writing it, we will not be willing to discard it easily. It is the result of our work. We will gradually improve it and enjoy its happiness. This is also a type of repeated invention wheel. I am willing to find happiness in the repeated invention wheel!