composite-class

An isomorphic, load-anywhere JavaScript class for building composite structures. Suitable for use as a super class or mixin.

Synopsis

The Composite class implements the composite design pattern, useful for building and traversing tree structures. For example, build a composite structure representing the French government:

const Composite = require('composite-class')

class Person extends Composite {
  constructor (name, role) {
    super()
    this.name = name
    this.role = role
  }

  toString () {
    return `${this.name} [${this.role}]`
  }
}

const government = new Person('Gouvernement de la République française', 'Government')
const headOfState = new Person('Emmanuel Macron', 'Head of State')
const primeMinister = new Person('Édouard Philippe', 'Prime Minister')
const ministerArmedForces = new Person('Florence Parly', 'Minister of the Armed Forces')
const ministerEconomy = new Person('Bruno Le Maire', 'Minister of Finance and the Economy')

government.add(headOfState)
headOfState.add(primeMinister)
primeMinister.add(ministerArmedForces)
primeMinister.add(ministerEconomy)

console.log(government.tree())

Output.

- Gouvernement de la République française [Government]
  - Emmanuel Macron [Head of State]
    - Édouard Philippe [Prime Minister]
      - Florence Parly [Minister of the Armed Forces]
      - Bruno Le Maire [Minister of Finance and the Economy]

The Composite class implements an iterable interface, therefore can be iterated using standard JavaScript methods.

for (const person of government) {
  console.log('Processing:', person.name)
}

Output.

Processing: Gouvernement de la République française
Processing: Emmanuel Macron
Processing: Édouard Philippe
Processing: Florence Parly
Processing: Bruno Le Maire

composite-class

An isomorphic, load-anywhere JavaScript class for building composite structures. Suitable for use as a super class or mixin.

Example

const Composite = require('composite-class')

composite-class
- Composite ⏏
  - instance
    - .children : Array
    - .parent : Composite
    - .add(child) ⇒ Composite
    - .append(child) ⇒ Composite
    - .prepend(child) ⇒ Composite
    - .remove(child) ⇒ Composite
    - .level() ⇒ number
    - .getDescendentCount() ⇒ number
    - .tree() ⇒ string
    - .root() ⇒ Composite
    - .Symbol.iterator()
    - .inspect()
    - .parents() ⇒ Array.<Composite>
  - static
    - .mixInto(target)

Composite ⏏

Kind: Exported class

composite.children : `Array`

Children

Kind: instance property of Composite

composite.parent : `Composite`

Parent

Kind: instance property of Composite