CODEWITHSUNDEEP
ecmascript-6reduximmutable.js
Turtles Are Cute
Turtles Are Cute

Reputation: 3436

Immutable JS -> modifying Lists

I'm trying to modify a list with Immutable.js. AFAIK, the syntax should be

import {List} from './immutable'

let origList = List(['a', 'b', 'c'])
let newList = origList.push('d')
// newList is coming out equal to 4

newList is taking an integer value: the size of the list; Immutable.js objects should return a modified version when you use them. How can I make a modified version of the list, ie using it in a Redux reducer?

Per the offical docs: "push() returns a new List with the provided values appended, starting at this List's size."

Upvotes: 0

Views: 44

Answers (1)

thedude
thedude

Reputation: 9822

ImmutableJS actually works as it should and returns a new, updated list. See snippet below.

let origList = Immutable.List(['a','b','c']);
console.log(origList.push('d'))
<script src="https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.1/immutable.min.js"></script>

Upvotes: 1

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