Function toString

toString<V>(separator?: string): Sink<V, string>
Creates a sink joining the items of the feed into a string.

Items are rendered and joined as Array.prototype.join() would, that is through their default string representation, null and undefined values excepted, which are rendered as empty strings; an empty feed joins to an empty string.
Warning
- Exhaustive: every item is drawn before the sink resolves, so an infinite feed never completes.
- Materialising: the whole feed is held in memory as a single string, so a large feed may exhaust it.
- Stateful: the string covers the items drawn, so a sink closing a nested or truncated feed sees those alone.
Type Parameters
- V
  The type of items in the feed
Parameters
- separator: string = ","
  The string inserted between consecutive items, defaulting to ,
Returns Sink<V, string>
A sink resolving to the string joining the items of the feed
Example
```
await pipe(
  (items([1, 2, 3]))
  (toString())
);  // "1,2,3"

await pipe(
  (items([1, 2, 3]))
  (toString(" - "))
);  // "1 - 2 - 3"
```
- Defined in sinks/toString.ts:53