Function computeIfAbsentInWeakMap

computeIfAbsentInWeakMap<K extends WeakKey, V>(
    map: WeakMap<K, V>,
    key: K,
    mappingFunction: (key: K) => V,
): V
If the specified key is not already associated with a value in this weak map, computes its value using the given mapping function and enters it into this map.
Type Parameters
- K extends WeakKey
- V
Parameters
- map: WeakMap<K, V>
  map from which to get the key's value or compute and associate
- key: K
  key for which to get the value or with which the computed value is to be associated
- mappingFunction: (key: K) => V
  function to compute a value for key
Returns V
- Defined in entity-database-adapter-knex/src/internal/weakMaps.ts:9