Re: [Rails] Confusion with Hash duplicate key removal

On Sep 10, 2013, at 12:32 AM, Love U Ruby <lists@ruby-forum.com> wrote:

> Hi,
>
> I have one basic question to ask regarding Hash key. Follow the below :
>
> "foo".object_id # => 72994000
> "foo".object_id # => 72993390
> {"foo" =>2,"foo" =>3} # => {"foo"=>3}
>
> I do know that Hash don't allow duplicate keys. But I would like to by
> which method hash check if any duplicate key present into it or not? As
> I can see "foo" have different `object_id`,which is expected. But in
> case of Hash key how this two different objects "foo" is treated as same
> object?

The hash's keys' object id's are not what is compared. If you take both of those strings, and did this:

"foo" == "foo"

You'd get true, regardless of the fact they have different object ids.

You are making this way way way more complicated than it is.

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