Function addValue

addValue<V>(
    map: undefined | Map<string, V> | ReadonlyMap<string, V>,
    hasher: ToString<V>,
    collisionPolicy: "throw" | "overwrite" | "skip",
    ...values: readonly V[],
): Map<string, V>
Adds values to a map, returning a new, modified copy and leaving the original intact.

Use addValueMutate for a mutable
Type Parameters
- V
Parameters
- map: undefined | Map<string, V> | ReadonlyMap<string, V>
  Map to start with, or undefined to automatically create a map
- hasher: ToString<V>
  Function to create keys for values
- collisionPolicy: "throw" | "overwrite" | "skip"
  What to do if a key already exists
- ...values: readonly V[]
  Values to add
Returns Map<string, V>
A new map containing values
- Defined in packages/core/src/maps.ts:249