Function defaultIfEmpty

defaultIfEmpty<T>(defaultValue): OperationFunction<T, T>
Emits a default value if the source is empty.
Type Parameters
- T
  Type of items emitted by the source.
Parameters
- defaultValue: ValueOrFactory<T>
  Value to emit if the source is empty.
Returns OperationFunction<T, T>
Operation that emits a default value if the source is empty.
Example
```
const result = defaultIfEmpty('A')([]);
console.log([...result]); // ['A']
```
- Defined in operations/defaultIfEmpty/defaultIfEmpty.ts:41