Function indexed`Const`

indexed<T>(): (src: Iterable) => Iterable
Pairs each element from the source iterable with its zero-based index.

Curried version of _indexed.
Type Parameters
- T
  Element type produced by the source iterable.
Returns (src: Iterable) => Iterable
A deferred iterable yielding [item, index] tuples for every element.
Example
```
const pairs = [..._indexed(["a", "b", "c"])];
console.log(pairs); // [["a", 0], ["b", 1], ["c", 2]]
```
or using the curried version:
```
const pairs = [
  ...pipeInto(
    ["a", "b", "c"],
    indexed()
  ),
];
console.log(pairs); // [["a", 0], ["b", 1], ["c", 2]]
```