JavaScript: Maps and Sets

Course details

Programming languages are always evolving and changing, and JavaScript is no exception. Over time, JavaScript has grown, and many new aspects have been added, including maps and sets. JavaScript maps and sets may sound simple, but they aren't quite the same as their counterparts in other programming languages. In this course, software engineer Jamie Pittman covers the ins and outs of JavaScript maps and sets, their syntax, how they work, and how to integrate them into your daily coding practice. Topics covered include a general overview of these features, when and where to use them, their WeakMap and WeakSet versions, and the various methods and properties associated with them.

Concepts

0. Introduction

01 - Get to know JavaScript maps and sets
02 - What you should know

1. Maps

03 - The Map object defined
04 - Build your Map object with the set method
05 - Access a value with get
06 - Does the map have your key
07 - Determine map size
08 - Remove key-value pairs with clear and delete
09 - Map - Keys and values methods
10 - Map contents with the entries method
11 - Loop over a map with forEach
12 - Group entries with groupBy
13 - Solution - Maps 1
14 - Solution - Maps 2

2. WeakMaps

15 - What is the WeakMap object
16 - Same methods, different map

3. Sets

17 - The Set object defined
18 - Add values to your set
19 - Does Set have your value
20 - Get your set size
21 - Delete and clear values in your set
22 - Iterate over values in a set
23 - Iterate over a set with entries
24 - Iterate over your set with forEach
25 - Solution - Sets 1
26 - Solution - Sets 2

4. WeakSets

27 - What is the WeakSet object
28 - Same methods, different set

Conclusion

29 - Next steps

JavaScript: Maps and Sets

Authors

Jamie Pittman