Package detail

Wht fuck is this

This is a MapSet data structure, is something like:

    const mapSet = new Map('key', new Set());

but better. It takes care to create SETS automatically on set, and remove keys where the SET is empty, it inherits MAP, so all MAP method are available, obviously.

Usage

    const MapSet = require('map-set');

    const mapSet = new MapSet('key', 'value-1', 'value-2', 'value-3'); 
    console.log(mapSet.entries());
    // { [ 'key', Set { 'value-1', 'value-2', 'value-3' } ] }

    mapSet.set('key', 'value-3', 'value-4', 'value-5');
    console.log(mapSet.entries());
    // [ 'key', Set { 'value-1', 'value-2', 'value-3', 'value-4', 'value-5' } ] }

    mapSet.set('key-1', 'value-1', 'value-2', 'value-3'); 
    console.log(mapSet.entries());
    // ['key', Set { 'value-1', 'value-2', 'value-3', 'value-4', 'value-5' } ], [ 'key-1', Set { 'value-1', 'value-2', 'value-3' } ] }

    console.log(mapSet.size()); // 2
    console.log(mapSet.size('key')); // 5

    mapSet.clear('key-1');
    console.log(mapSet.entries());
    // ['key', Set { 'value-1', 'value-2', 'value-3', 'value-4', 'value-5' } ] }

    mapSet.clear();
    console.log(mapSet.entries());
    // {}

    console.log(mapSet.has('key')); // true
    console.log(mapSet.has('no-key')); // false
    console.log(mapSet.has('key', 'value-1')); // true
    console.log(mapSet.has('key', 'value-5')); // false

    mapSet.delete('key');
    console.log(mapSet.entries());
    // {}

    mapSet.delete('key', 'value-2');
    console.log(mapSet.entries());
    // { [ 'key', Set { 'value-1', 'value-3' } ] }

    mapSet.delete('key', 'value-2', 'value-3');
    console.log(mapSet.entries());
    // { [ 'key', Set { 'value-1' } ] }

    mapSet.delete('key', 'value-1', 'value-2', 'value-3');
    console.log(mapSet.entries());
    // { }

    mapSet.forEach(console.log);
    // Set { 'value-1', 'value-2', 'value-3' }

    mapSet.forEach('key', console.log);
    // 'value-1'
    // 'value-2' 
    // 'value-3'

Cool, no!!?