.map()'s second argument contains the element too, instead of the index

Given this I expecting the consecutive array index in i.

Lazy({key1: "value1", key2: "value2"})
  .keys()
  .map((key, i) => {
    console.log(key, i);
  })
  .value();

I am expecting this output:

key1 0
key2 1

But I am getting also the element in i:

key1 key1
key2 key2

[dtao]

And by tomorrow I meant “in roughly a year.”

Looking now.

[dtao]

I should have timed this better so that I fixed it on Feb 5, 2017.