From: Mark Hubbart <discord@...>
Date: 2004-04-24T14:57:09+09:00
Subject: Re: Array to Hash


On Apr 23, 2004, at 10:14 PM, Ara.T.Howard wrote:

> On Sat, 24 Apr 2004 nobu.nokada@softhome.net wrote:
>
>> Hi,
>>
>> At Sat, 24 Apr 2004 13:05:20 +0900,
>> Pe�a, Botp wrote in [ruby-talk:98203]:
>>> I would rather prefer:
>>>
>>>>> h2 = a.to_hash   # or a.to_h
>>> {"x"=>1, "y"=>3}
>>
>> module Enumerable
>>   def to_h
>>     inject({}) {|h, (k, v)| h[k] = v; h}
>                       ^^^^^^
>                       ^^^^^^
>                       ^^^^^^
>                       what's this?
>>   end
>> end

module Enumerable
   def to_h
     inject({}) {|h, (k, v)| h[k] = v; h}
                  ^   ^^^^
                  1     2
1: is the hash that keeps being passed through inject each time.
2: is the key=>value pair, expanding it from a two element array.

I didn't even realize you could do that type of assignment in a block's 
parameter list, but hey! that's pretty cool.

I think this should be a standard Array method. There have been many 
times I've done just this type of thing to get a hash from an array, 
for various reasons.

cheers,
--Mark