Re: sorting string

[davido]

Try this:

print "$_\n"
    for sort { $b <=> $a } ( $string1, $string2, $string3 )

Note, this illustrates the contortions you put yourself through by using variables such as $string1, $string2, and $string3 when you really ought to be using a proper array such as @strings. Look at how the snippet improves if you use a proper array:

print "$_\n" for sort { $b <=> $a } @array;

It could also be written as:

print map { "$_\n" } sort { $b <=> @a } @array;

Or even...

{
    local $, = "\n";
    print(
        sort( { $b <=> $a } @array ),
        ''
    );
}

By the way; the title to your question, "Sorting strings" seems to be a misnomer, since in your question you seem to be asking how to sort numeric values. Maybe I've missed the point. But if you're trying to sort ascii-betically (instead of numerically), use the cmp operator instead of <=>. This and more is discussed in sort.

[Anonymous Monk]

But how do I know which belong to which string? It will list something like this '123343322' so how do I save the list in a database for example? if it could list string1 = 122, string = 222, string 3 = 333... TQ

[davido]

Yes, after posting my response it hit me that your question simply didn't ask what you wanted answered.

Zaxo has it right; you probably want a hash with key/value relationship. Then you ultimately want the strings stored as keys, and the computed values as values associated with the keys. ...something like this:

use strict;
use warnings;
my %strings;

# Set up some example key/value relationships.  Your method
# for populating the hash will be more complex, but isn't
# defined in the question.
$strings{"Here is one string"} = 233;
$strings{"Here is another string"} = 151;
$strings{"Here is yet another"} = 322;

print map{ "$_ = $strings{$_}\n" }
        sort{ $strings{$b} <=> $strings{$a} }
            keys %strings;