How can one incorporate intricate keys into a map using TypeScript?

I am attempting to create a map in TypeScript that uses two-part keys. The key format I am working with looks like this:

type Key = {
  section: number,
  index: number
}

In my attempts to implement this, I have created a map using the following syntax:

let map = new Map<Key,Record>()

However, when I try to retrieve a value from the map using:

cont val = map.get(myKey)

The result is always undefined.

Is there a way to successfully store and access complex types in TypeScript maps?

Answer №1

When utilizing an object as a key in a Map, it is essential to ensure that the reference of the key used during map setting matches when retrieving from the map!

let myKey:Key = {index:1,section:2}
map.set(myKey,your object)
const val = map.get(myKey); // Now has value

However, it is recommended to use primitive types as keys. You could create a new string key by combining section and index!

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