Function mapGetOrElse

mapGetOrElse<K, V>(map, key, callback): V
Returns a value from a map, while setting a given default value before returning it, if the key is not present.
Type Parameters
- K
  
  The type of the keys in the Map.
- V
Parameters
- map: Map<K, V>
  
  map to get value from
- key: K
  
  key to get value for
- callback: ((key) => V)
  
  callback to set the value if key is not present
  - - (key): V
    - Parameters
      
      key: K
      
      Returns V
Returns V
The value retrieved from the Map or generated by the callback function.
Example
```
const map = new Map<string, number>()
map.set('key', 1)
mapGetOrElse(map, 'nonexistentKey', () => 2) // Output: 2
```
- Defined in packages/util/src/map/mapGetOrElse.ts:14

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