concept Software entities (classes, modules, functions) should be open f...

concept There should never be more than one reason for a class to change...

單一職責(zé)(Single Responsibility Principle) 每個(gè)方法，每個(gè)類，每個(gè)框架闽坡，都只負(fù)責(zé)一件事情 (There shou...