What you do today can improve all your tomorrows.
Bear in mind: S = Single Responsibility Principle
O = Opened Closed Principle
L = Liskov Substitution Principle
I = Interface Segregation Principle
D = Dependency Inversion Principle
摘要:
1. 赋值 var o = anything || ' anythig is undefined'; // o 首先会取值 anything, 但如果anything 未定义, 则会取值 'anything is undefined'. var o = anything && 'anything i 阅读全文