I recently wrote an article called “Master the JavaScript Interview: What’s the Difference Between Class and Prototypal Inheritance?” Afterwards, I got several questions asking for more information…
Today, we are are going to talk about composition over inheritance. Inheritance is when you design your types after what they are, while composition is when you design your types after what they…
E-Mails, Soziale Netzwerke, Cloud-Dienste: Im Netz bleiben viele Daten zurück, wenn jemand stirbt. Doch geregelt haben die wenigsten ihren digitalen Nachlass. Für die Erben beginnt oft eine Suche nach Konten, Zugangsdaten, Verträgen. Der BGH hat ihre Rechte gestärkt. Und es gibt Möglichkeiten vorzubeugen.
Also, WAT? is the sound I make when I talk to many seasoned JavaScript developers who have neglected to learn the basic mechanics of prototypal inheritance: one of the most important innovations in…
In order to claim fluency in JavaScript, it’s important to understand how JavaScript’s native inheritance capabilities work. This is an often neglected area of JavaScript writing and learning, but…
In OpenAPI version 3, you do this with the allOf keyword:
components:
schemas:
BasicErrorModel:
type: object
required:
- message
- code
properties:
message:
type: string
code:
type: integer
minimum: 100
maximum: 600
ExtendedErrorModel:
allOf: # Combines the BasicErrorModel and the inline model
- $ref: '#/components/schemas/BasicErrorModel'
- type: object
required:
- rootCause
properties:
rootCause:
type: string
In the example above, the ExtendedErrorModel schema includes its own properties and properties inherited from BasicErrorModel
Prototypal inheritance is arguably the least understood aspect of JavaScript. Well the good news is that if you understand how CSS works, you can also understand how JavaScript prototypes work.
I would strongly advise not to inherit from a case class. It has surprising effects on equals and hashCode, and has been deprecated in Scala 2.8.
Instead, define x in a trait or an abstract class.
scala> trait A { val x: Int }
defined trait A
scala> case class B(val x: Int, y: Int) extends A
defined class B
http://www.scala-lang.org/node/3289
http://www.scala-lang.org/node/1582