里氏替换原则是面向对象编程中的一个基本概念,它指出子类的对象应该能够替换超类的对象而不影响程序的正确性。
做好研究的秘诀是始终保持轻微的工作不足状态。因为无法浪费几个小时,你可能会浪费数年时间。
I believe in second chances because I know what it's like to need one.
Every piece of plastic ever made still exists somewhere - that's not just a fact, it's our responsibility.