Function product

product<A, B, O>(a, b, productFunction): Stream<O>
Returns a Stream that merges elements from both iterables by taking one element from each, passing them to the function, and yielding the result.
Type Parameters
- A
- B
- O
Parameters
- a: Iterable<A>
  The first iterable to merge.
- b: Iterable<B>
  The second iterable to merge.
- productFunction: ((a: A, b: B) => O)
  The function that merges the elements.
  - - (a, b): O
    - Parameters
      a: A
      b: B
      Returns O
Returns Stream<O>
A Stream that merges elements from both iterables.
Example
```
const result = product('ABCD', 'xy', (a, b) => `${a}${b}`);
console.log([...result]); // ['Ax', 'Ay', 'Bx', 'By', 'Cx', 'Cy', 'Dx', 'Dy']
```
- Defined in creators/product/product.ts:34