From: Jean-Julien Fleck <jeanjulien.fleck@...>
Date: 2010-04-03T15:08:26+09:00
Subject: Re: hash key with multiple values

Hello,

> i have the hash result is

I would rather say that it is an array of hashes that you want to
transform into an hash of arrays.

> Please help me

First, you have to get the keys that will be in the resulting hash,
for example using inject (that here merge all the hashes into one big
hashes but loosing multiple entries of the same key):

arr = [{x=>"i8"}, {y=>"i58"}, {y=>"i6"}, {y=>"v5"}, {z=>"ci5"},
{z=>"i63"}, {w=>"cie201"}]
keys = arr.inject {|hash,h| hash.merge(h)}.keys
p keys

Then iterate over the keys and populate the resulting hash by
selecting all the adequate values (that is those whose call don't
answer nil) and collecting them:

result_hash = {}
keys.each do |k|
  result_hash[k] = arr.select {|h| h[k]}.collect {|h| h[k]}
end
p result_hash

Hope this helps.

-- 
JJ Fleck
PCSI1 Lycée Kléber