Function concat

concat<T>(iterable, ...values): Iterable<T>
The equivalent of Array.prototype.concat for iterators.
Type Parameters
- T
Parameters
- iterable: Iterable<T, any, any>
  The initial value to add to.
- Rest...values: (T | Iterable<T, any, any>)[]
  Additional iterables to concatenate with the initial value.
Returns Iterable<T>