Mastering Immutable.js

Converting to sets, then back to lists

Once we've converted our list to a set, we'll have removed any duplicates. However, we do useful things with lists, such as getting values at a specific index or iterating over values in a consistent order. To do this, we'll convert our set back to a list, as shown here:

const myUniqueList = myList  .toSet()  .toList();console.log('myUniqueList', myUniqueList.toJS());// -> myUniqueList [ 1, 2, 3 ]

Using this approach, the set is an intermediary collection. Using sets ephemerally to enforce uniqueness is a common pattern in Immutable.js applications.