Writing Clean Immutable JavaScript

Discussing several array/object patterns I created to help with writing clean immutable JavaScript code. Resources - Understanding Immutability in JavaScript: https://www.youtube.com/watch?v=V0brGYlnWXA Code Examples: https://github.com/justsunone/ImmutableJavaScriptArrayAndObjectPatterns 00:00 Intro 00:34 Building a Complex Object Once 8:45 Building an Array with Optional Items 14:23 Declaratively Transforming an Array 20:16 Conclusion