Function firstEntryByValue

firstEntryByValue<K, V>(
    map: Data.Maps.IWithEntries<K, V>,
    value: V,
    isEqual?: IsEqual<V>,
): undefined | readonly [K, V]
Finds first entry by value.
```
const map = new Map();
map.set('hello', 'a');
map.set('there', 'b');

const entry = firstEntryByValue(map, 'b');
// Entry is: ['there', 'b']
```
An alternative is firstEntryByValue to search by predicate function.
Type Parameters
- K
- V
Parameters
- map: Data.Maps.IWithEntries<K, V>
  Map to search
- value: V
  Value to seek
- isEqual: IsEqual<V> = isEqualDefault
  Filter function which checks equality. Uses JS comparer by default.
Returns undefined | readonly [K, V]
Entry, or undefined if value not found.