Skip to Content
Learning JavaScript Data Structures and Algorithms - Third Edition
book

Learning JavaScript Data Structures and Algorithms - Third Edition

by Loiane Avancini
April 2018
Beginner to intermediate content levelBeginner to intermediate
426 pages
10h 19m
English
Packt Publishing
Content preview from Learning JavaScript Data Structures and Algorithms - Third Edition

Creating the Dictionary class

Similar to the Set class, ECMAScript 2015 also contains an implementation of the Map class, also known as a dictionary.

The class we will implement in this chapter is based on the Map implementation of ECMAScript 2015. You will notice that it is very similar to the Set class (but instead of storing a [key, key] pair, we will store a [key, value] pair).

The following is the base structure of our Dictionary class:

import { defaultToString } from '../util';export default class Dictionary {  constructor(toStrFn = defaultToString) {    this.toStrFn = toStrFn; // {1}    this.table = {}; // {2}  }}

Similar to the Set class, we will also store the elements of the Dictionary class in an Object instance instead of an array (

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Learning JavaScript Data Structures and Algorithms

Learning JavaScript Data Structures and Algorithms

Loiane Avancini

Publisher Resources

ISBN: 9781788623872Supplemental Content