Function multimapAdd

multimapAdd<K, V>(m: Map<K, V[]>, k: K, v: V): V[]
Adds a value to the array for a key in a Map-backed multimap.

Creates the array if the key doesn't exist.
Type Parameters
- K
  Key type.
- V
  Value type.
Parameters
- m: Map<K, V[]>
  The multimap.
- k: K
  The key.
- v: V
  The value to add.
Returns V[]
The array for key k (same reference).
Example
```
const mm = new Map<string, number[]>();
multimapAdd(mm, "a", 1);
multimapAdd(mm, "a", 2);
mm.get("a"); // [1, 2]
```
- Defined in data-structure/multimap.ts:21
multimapAdd<K extends PropertyKey, V>(m: Record<K, V[]>, k: K, v: V): V[]
Adds a value to the array for a key in a Record-backed multimap.

Creates an own array if the key has no own value. Inherited values are ignored, including __proto__, constructor, and toString; the record's prototype is unchanged.
Type Parameters
- K extends PropertyKey
  Key type (must be PropertyKey).
- V
  Value type.
Parameters
- m: Record<K, V[]>
  The multimap.
- k: K
  The key.
- v: V
  The value to add.
Returns V[]
The array for key k (same reference).
- Defined in data-structure/multimap.ts:36