From: Hans Mackowiak <lists@...>
Date: 2012-10-11T02:30:44+09:00
Subject: Re: How to create an Array in a Hash

1)
this line replaces all your other posted lines.
so you have this:

anagram_array = words.uniq.group_by{|w| 
w.downcase.each_char.sort}.values

2)
uniq removes the second scream
group_by wants a block
w.downcase.each_char.sort makes an array of chars so "Cars" will be 
turned to ["a","c","r","s"]

so we have:
{
["a", "c", "r", "s"]=>["cars", "scar"],
["f", "o", "r", "u"]=>["four"],
["a", "c", "e", "m", "r", "s"]=>["creams", "scream"]
}

but you only want the values, so i add .values

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