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From: merlyn@iwarp.intel.com (Randal Schwartz)
Newsgroups: comp.lang.perl
Subject: Re: sorting associative arrays
Keywords: perl, arrays
Message-ID: <1990Oct30.163709.26412@iwarp.intel.com>
Date: 30 Oct 90 16:37:09 GMT
References: <2524@mtecv2.mty.itesm.mx>
Sender: news@iwarp.intel.com
Reply-To: merlyn@iwarp.intel.com (Randal Schwartz)
Distribution: comp
Organization: Stonehenge; netaccess via Intel, Beaverton, Oregon, USA
Lines: 43
In-Reply-To: jgabriel@mtecv2.mty.itesm.mx (Juan Gabriel Ruiz Pinto)

In article <2524@mtecv2.mty.itesm.mx>, jgabriel@mtecv2 (Juan Gabriel Ruiz Pinto) writes:
| 
|   I'm doing some perl scripts, but I need to sort an associative
|   array but I want to sort it with the value of each register,
|   I mean, if i have,
| 
|       $xs{"aaa"} = 4;
|       $xs{"bbb"} = 5;
|       $xs{"ccc"} = 2;
| 
|    I want to get the following results after the sort..
| 
| 		bbb	5
| 		aaa	4
| 		ccc	2
| 
|    Any body has a good procedure to do that?

It's a bit hard to see what you want.  A descending sort by value?  That'd
be something like this:

##################################################
$xs{"aaa"} = 4;
$xs{"bbb"} = 5;
$xs{"ccc"} = 2;

for $key (sort by_dec_xs_vals keys xs) {
	print "$key is $xs{$key}\n";
}

sub by_dec_xs_vals {
	$xs{$a} < $xs{$b} ? 1 : -1;   # $xs{$b} <=> $xs{$a} if you have it
}
##################################################

Like that?

print "Just another descending Perl hacker,"
-- 
/=Randal L. Schwartz, Stonehenge Consulting Services (503)777-0095 ==========\
| on contract to Intel's iWarp project, Beaverton, Oregon, USA, Sol III      |
| merlyn@iwarp.intel.com ...!any-MX-mailer-like-uunet!iwarp.intel.com!merlyn |
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