Why extends is evil

Why extends is evil Improve your code by replacing concrete base classes with interfaces The extends keyword is evil; maybe not at the Charles Manson level, but bad enough that it should be shunned whenever possible. The Gang of Four Design Patterns book discusses at length replacing implementation inheritance (extends) with interface inheritance (implements). Good designers write most of their co

[Dai_Kamijo]

Why extends is evil — BEAR.Sunday (@BEARSunday) August 31, 2016 from Twitter https://twitter.com/Dai_Kamijo September 01, 2016 at 02:27PM via IFTTT

[twainy]

extendsが何故悪か。柔軟なシグネチャの変更が出来ない。関連するコードが離れたソースに置かれることになる。ベースクラスの変更に弱い