immutable.js – IT Nursery

Why is immutability so important (or needed) in JavaScript?

May 22, 2022 by IT Nursery

I am currently working on React JS and React Native frameworks. On the half way road I came across Immutability or the Immutable-JS library, when I was reading about Facebook’s Flux and Redux implementation. The question is, why is immutability so important? What is wrong in mutating objects? Doesn’t it make things simple? Giving an … Read more

Index inside map() function

May 4, 2022 by IT Nursery

I am missing a option how to get the index number inside the map function using List from Immutable.js: var list2 = list1.map(mapper => { a: mapper.a, b: mapper.index??? }).toList(); Documentation shows that map() returns Iterable<number, M>. Is there any elegant way to what I need? 4 Answers 4