wiki/content/20201126102708-abstraction.md

---
date: 2020-11-26
id: 097ba634-5976-437d-84c9-3bfe776df02b
title: abstraction
---

# Origin

Latin abstrahere "drawm from"

# Definition

Hide implementation details from the user. For exapmle by extending
classes.

# Examples

``` typescript
abstract class Fish {
    swim() { return '>>>>>' }
}

class Shark extends Fish  {
    name: 'shark'
}

class Tuna extends Fish {
    name: 'tuna'
}
```