Function unleft

unleft<L, R>(either: Either<L, R>): IOption<L>
Unwraps a the left value into an Option

Example
```
unleft(right(1)).unwrapOr(2) === 2
unleft(left(NaN)).unwrapOr(2) === NaN
```
Type Parameters
- L
- R
Parameters
- either: Either<L, R>
Returns IOption<L>
- Defined in packages/utility/src/either/index.ts:132

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