> import { fromKeys , reflect } from '@iterable-iterator/mapping' ;
> import {enumerate} from '@iterable-iterator/zip';
> fromKeys( 'ab' , 1 )
[['a', 1], ['b', 1]]
> reflect(enumerate('ab'))
[['a', 0], ['b', 1]]
> Object.fromEntries(reflect(enumerate('ab')))
{ 'a': 0, 'b': 1 }