Function setIfAbsent

setIfAbsent<K, V>(map: Map<K, V>): ((key: K, value: V) => void)
Add the value to the Map if it doesn't already have an entry with the same key

Mutation

Example
Set a Map entry if the key is absent
```
const map = new Map();
setIfAbsent(map, 1, 2);
console.log(map); // Map([[1, 2]])
```
Type Parameters
- K
  
  the Map key type
- V
  
  the Map value type
Parameters
- map: Map<K, V>
  
  the Map to set the entry
Returns ((key: K, value: V) => void)
- - (key: K, value: V): void
  - Parameters
    - key: K
    - value: V
    Returns void
- Defined in packages/map/src/setIfAbsent.ts:19

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