From: Love U Ruby <lists@...>
Date: 2013-05-22T00:27:12+09:00
Subject: Re: Enum#each issue

Hans Mackowiak wrote in post #1109722:

Apologies to make you irritate on me. Your first example I understood. 
The below one little bit hard for me.

> the normal each DOES NOT!!

> there is a sample with "map!"

> a = [1,2,3,4]
> m=a.to_enum(:map!)
>
> m.next #=> 1
> m.feed("a")
>
> m.next #=> 2 Why not "a" comes out here?
>
> m.next #=> 3
> m.feed("b")
>
> m.next #=> 4 why not "b" comes not here like your first example.
>
> a #=> ["a", nil, "b", 4] #=> How has the output generated? from where `nil` 
comes?

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