Function hasLefts

hasLefts<A>(zipper: Zipper.Zipper<A>): boolean
True if there are trees to the left of the focus, false if focused node is head in its forest.
Type Parameters
- A
  Underlying tree type.
Parameters
- zipper: Zipper.Zipper<A>
  Zipper to be queried.
Returns boolean
True if there are trees to the left of the focus.
Example
```
import {Zipper, from, of} from 'effect-tree'
import {pipe} from 'effect'

const tree = from(1, of(2), of(3))

const zipper = pipe(
  tree,
  Zipper.fromTree,
  Zipper.head
)

expect(Zipper.hasLefts(zipper)).toBe(false)

const moved = Zipper.next(zipper)

expect(Zipper.hasLefts(moved)).toBe(true)
```
- Defined in src/zipper/data.ts:96