Function computeIfAbsent

computeIfAbsent<K, V>(map: Map<K, V>, key: K, mappingFunction: (key: K) => V): V
If the specified key is not already associated with a value in this map, computes its value using the given mapping function and enters it into this map.
Type Parameters
- K
- V
Parameters
- map: Map<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 packages/entity/src/utils/collections/maps.ts:11