Ruby Enumerator class

Question

I've read about Enumerator class. And I can't fully understand what's going on here:

[0, 1].each { |i| puts i }

By itself [0, 1].each returns => #<Enumerator: [0, 1]:each>

So the question is Are we pathing block to each method of the array or to the instance of the Enumerator class?

Answer 1

As many other methods, Array#each returns and Enumerator if a block is not passed but it iterates over the array and calls the block for each item if a block is passed.

The values returned by the block for each array item are the elements of the array returned by Array#each when a block is passed.

To answer your question, the block and the Enumerator never met.

Answer 2

You can't pass arguments (including blocks) to objects. The only things that can take arguments (including blocks) are message sends and blocks. So, obviously, it has to be the former.