Re: An Old Question on Sorting Hash of Arrays by Array element and th en by key

[James Edward Gray II]

On Feb 18, 2004, at 6:16 PM, Mark LoBue wrote:

At 03:49 PM 2/18/2004, James Edward Gray II wrote:
On Feb 18, 2004, at 1:58 PM, Smith Jeff D wrote:

I am trying to sort a hash of arrays that is similar to the example 
below.
I have a hash of arrays that I want to sort, first by the first 
element of
the array, then by the key to the hash and don't care about other 
elements
of the array (for sorting and without regard to case.

%HofA = (orange=>['ZZZ', 'ANDY'],
          red=>['AAA', 'AL'],
          blue=>['mmm','Betty'],
          yellow=>['aaa', 'ZEUS'],
          green=>['DDD','Mary Joe']
          violet=>['MMM','Hugo']
          );
my @ordered_keys = sort { $HofA{$a}[0] cmp $HofA{$b}[1]
                                          ||
                                          $a cmp $b } keys %HofA;
Ok, I'll bite, why this:

my @ordered_keys = sort { $HofA{$a}[0] cmp $HofA{$b}[1]
and not this:

my @ordered_keys = sort { $HofA{$a}[0] cmp $HofA{$b}[0]


I would have guessed you want the same array element in the 2 
comparison values.
You're exactly right.  Egad.  Long day.  My bad.

James

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