SuperSet

SuperSet class extends Set and add some methods, such as higher-order function.

Installation

$ npm i @js-commons/super-set

or

$ yarn add @js-commons/super-set

Use in your script

const SuperSet = require('@js-commons/super-set')

or

import SuperSet from '@js-commons/super-set'

API

You can use Set's self methods and below additional methods.

Creation

SuperSet.empty()

const set = SuperSet.empty()
console.log(set) // {}

SuperSet.of(...values)

const set = SuperSet.of('foo', 'bar')
console.log(set) // { 'foo', 'bar' }

SuperSet.from(iterable)

const set = new Set(['foo', 'bar'])
const superSet = SuperSet.from(set)
console.log(superSet) // { 'foo', 'bar' }

Intermediate operation

SuperSet.peek(callback)

const set = SuperSet.of('foo', 'bar')
const tmpArray = []
const peekedSet = set.peek(v => tmpArray.push(v))
console.log(peekedSet) // { 'foo', 'bar' }
console.log(tmpArray) // [ 'foo', 'bar' ]

SuperSet.peek(callback, thisArg)

const set = SuperSet.of('foo', 'bar')
const thisArg = 'baz'
const tmpArray = []
const peekedSet = set.peek(function (v) {
  tmpArray.push(v + this)
}, thisArg)
console.log(peekedSet) // { 'foo', 'bar' }
console.log(tmpArray) // [ 'foobaz', 'barbaz' ]

SuperSet.filter(callback)

const set = SuperSet.of('foo', 'bar')
const filteredSet = set.filter(v => v.startsWith('f'))
console.log(filteredSet) // { 'foo' }

SuperSet.map(callback)

const set = SuperSet.of('foo', 'bar')
const mappedSet = set.map(v => v + '_')
console.log(mappedSet) // { 'foo_', 'bar_' }

Terminal operation

SuperSet.find(callback)

const set = SuperSet.of('foo', 'bar')
const value = set.find(v => v.startsWith('f'))
console.log(value) // foo

onst set = SuperSet.empty()
const value = set.find(v => v.startsWith('f'))
console.log(value) // undefined

SuperSet.some(callback)

const set = SuperSet.of('foo', 'bar')
console.log(set.some(v => v.startsWith('f'))) // true

const set = SuperSet.empty()
console.log(set.some(v => v.startsWith('f'))) // false

SuperSet.every(callback)

const set = SuperSet.of('foo', 'bar')
console.log(set.every(v => v.length === 3)) // true

const set = SuperSet.of('foo', 'bar')
console.log(set.every(v => v.startsWith('f'))) // false

SuperSet.isEmpty()

const set = SuperSet.of('foo', 'bar')
console.log(set.isEmpty()) // false

const set = SuperSet.empty()
console.log(set.isEmpty()) // true

SuperSet.isNotEmpty()

const set = SuperSet.of('foo', 'bar')
console.log(set.isNotEmpty()) // true

const set = SuperSet.empty()
console.log(set.isNotEmpty()) // false

SuperSet.toArray()

const set = SuperSet.of('foo', 'bar')
const values = set.toArray()
console.log(values) // [ 'foo', 'bar' ]

SuperSet.toSet()

const superSet = SuperSet.of('foo', 'bar')
const set = superSet.toSet()
console.log(set) // { 'foo', 'bar' }