From: yermej <yermej@...>
Date: 2008-01-10T09:04:57+09:00
Subject: Re: About array to hash conversion

On Jan 9, 3:31 pm, Holden Holden <pyar...@gmail.com> wrote:
> Hi,
>
> I want to convert an array (with pairs [key,value]) to a hash. After
> googling a bit I got:
>
> 1) Hash[*array.flatten]
>
> But this is not safe as Array#flatten is recursive.
>
> 2) array.inject({}) { |m, e| m[e[0]] = e[1]; m }
>
> Too ugly to consider.
>
> 3) Hash[*array.flatten(1)]
>
> That's my own attempt. It only works for Ruby > 1.9.
>
> But I am still wondering why...
>
> - Array objects have no "to_h" method?
> - Hasy[*array] don't accept the [key,value] pairs (as Hash#to_a calls
> return)?

These would only work in one specific case. What would this do?

[1, 2, 3].to_h