Function forEach

forEach<T>(
    iterator: AsyncIterable<T, any, any> | T[],
    fn: (v?: T) => boolean | void | Promise<void> | Promise<boolean>,
    options?: Partial<ForEachOptions>,
): Promise<void>
Iterates over an async iterable or array, calling fn for each value, with optional interval between each loop. If the async fn returns false, iterator cancels.
```
import { forEach } from "https://unpkg.com/ixfx/dist/flow.js"
// Prints items from array every second
await forEach([0,1,2,3], i => console.log(i), 1000);
```
```
// Retry up to five times, with 5 seconds between each attempt
await forEach(count(5), i=> {
 try {
   await doSomething();
   return false; // Succeeded, exit early
 } catch (ex) {
   console.log(ex);
   return true; // Keep trying
 }
}, 5000);
```
Type Parameters
- T
Parameters
- iterator: AsyncIterable<T, any, any> | T[]
  Iterable thing to loop over
- fn: (v?: T) => boolean | void | Promise<void> | Promise<boolean>
  Function to invoke on each item. If it returns false loop ends.
- options: Partial<ForEachOptions> = {}
  Options
Returns Promise<void>