The Liskov Substitution Principle is a fundamental concept in object-oriented programming, stating that objects of a superclass should be replaceable with objects of a subclass without affecting the correctness of the program.
Make stuff that is good for people to have.
物理学的未来不在于发现新的粒子,而在于理解支配我们已经知道的粒子行为的更深层次的原则。
I don’t let negativity affect me.