From: sto.mar@...
Date: 2013-06-25T00:41:53+09:00
Subject: Re: Confusin with Hash default

Am 23.06.2013 08:17, schrieb Love U Ruby:
> I was doing some practice and play with Hash default value as written in
> the documentation.
>
>
> h = Hash.new([])
> h[:a] << 2
> h[:a] << 3
> h[:a] # => [2, 3]
>
> Till above is perfect.
>
> h # => {}
>
> Why the Hash h is empty hash here?
>
> h[:b] << 2
> h[:b] # => [2, 3, 2]
>
> How h[:b] is `[2, 3, 2]` instead of only `[2]` ?

The documentation is very specific about the difference between
Hash.new() and Hash.new {}, providing in the first case a **single**
default object, whereas in the second case a fresh object is returned.
You should study the given examples.


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