Object+Array Simple Multi-Map

README.md

Bare Bones Object Based MultiMap

use case finding duplicates

simple-multimap.js

class MultiMap {
  constructor(container = Array) {
    this.map = {};
    this.Container = container;
  }
  set(k, v) {
    let container = this.get(k);
    if (!container) {
      container = new this.Container();
      this.map[k] = container.concat(v)
    }
    container.push(v)
    return this;
  }
  get(k) {
    return this.map[k];
  }
  has(k) {
    return this.map.hasOwnProperty(k);
  }
  values() {
    return Object.values(this.map);
  }
  keys() {
    return Object.keys(this.map);
  }
  entries() {
    return Object.entries(this.map);
  }
  inspect() {
    return this.map;
  }
}