Function prune

prune<A>(): Transformer<A, A>
An Transformer which commutes an Observable to one result value before finishing.
Type Parameters
- A
Returns Transformer<A, A>
A new observable which publishes one value.
Example
```
const three = prune()(each([3, 2, 1]));
void three.subscribe((n: number) => void console.log(`n = ${n}`));
```
Example
```
n = 3
```
- Defined in index.ts:332

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