object oriented

SOLID (object-oriented design) A mnemonic acronym introduced by Robert C. Martin in the early 2000s: S : Single responsibility principle — “an object should have only a single responsibility.” O : Open/closed principle — “software entities should be open for extension, but closed for modification.” L : Liskov substitution principle — “objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program.” (see also design by contract ) I : Interface segregation principle — “many client specific interfaces are better than one general purpose interface....