I don't think you'd need the scalar reverse on a big-endian platform: 

#! perl -slw
use strict;
use Data::Dump qw[ pp ];

my $reFloat = qr[([+-]?(?:\d+\.)?\d+(?:[Ee][+-]?\d+)?)];

sub sortEm ($$) {
    my( $a, $b ) = @_;
    my( $i, $comp ) = ( -1, 0 );
    $comp = $a->[ $ARGV[ $i ] ] cmp $b->[ $ARGV[ $i ] ]
        until ++$i > $#ARGV or $comp;
    $comp;
}

print $_->[ 0 ] for sort sortEm map {
    chomp;
    [
        $_, map{
            s[$reFloat][ scalar reverse pack 'd', $1]ge;
            $_
        } split '\|'
    ]
} <DATA>;


__DATA__
24.23|Sam|Sam04@yahoo.com||Hong Kong|<200020>
24.23|Sam|Sam04@yahoo.com||Hong Kong|<200000>
123123124.123|Tina|tina2007@gmail.com||London|<100030>
123124.123|Lucas|Lucas_fighter2025@yahoo.com||New York US|<200040>
12312.123|John|johon07@yahoo.com||Sunnyvalle California US|<200010>
12312.123|John|johon07@yahoo.com||Sunnyvalle California US|<200019>

[download]
c:\test>706475 1
24.23|Sam|Sam04@yahoo.com||Hong Kong|<200020>
24.23|Sam|Sam04@yahoo.com||Hong Kong|<200000>
12312.123|John|johon07@yahoo.com||Sunnyvalle California US|<200010>
12312.123|John|johon07@yahoo.com||Sunnyvalle California US|<200019>
123124.123|Lucas|Lucas_fighter2025@yahoo.com||New York US|<200040>
123123124.123|Tina|tina2007@gmail.com||London|<100030>

c:\test>706475 3
123124.123|Lucas|Lucas_fighter2025@yahoo.com||New York US|<200040>
24.23|Sam|Sam04@yahoo.com||Hong Kong|<200020>
24.23|Sam|Sam04@yahoo.com||Hong Kong|<200000>
12312.123|John|johon07@yahoo.com||Sunnyvalle California US|<200010>
12312.123|John|johon07@yahoo.com||Sunnyvalle California US|<200019>
123123124.123|Tina|tina2007@gmail.com||London|<100030>

c:\test>706475 5
24.23|Sam|Sam04@yahoo.com||Hong Kong|<200020>
24.23|Sam|Sam04@yahoo.com||Hong Kong|<200000>
123123124.123|Tina|tina2007@gmail.com||London|<100030>
123124.123|Lucas|Lucas_fighter2025@yahoo.com||New York US|<200040>
12312.123|John|johon07@yahoo.com||Sunnyvalle California US|<200010>
12312.123|John|johon07@yahoo.com||Sunnyvalle California US|<200019>

c:\test>706475 6
123123124.123|Tina|tina2007@gmail.com||London|<100030>
24.23|Sam|Sam04@yahoo.com||Hong Kong|<200000>
12312.123|John|johon07@yahoo.com||Sunnyvalle California US|<200010>
12312.123|John|johon07@yahoo.com||Sunnyvalle California US|<200019>
24.23|Sam|Sam04@yahoo.com||Hong Kong|<200020>
123124.123|Lucas|Lucas_fighter2025@yahoo.com||New York US|<200040>

c:\test>706475 6 1
123123124.123|Tina|tina2007@gmail.com||London|<100030>
24.23|Sam|Sam04@yahoo.com||Hong Kong|<200000>
12312.123|John|johon07@yahoo.com||Sunnyvalle California US|<200010>
12312.123|John|johon07@yahoo.com||Sunnyvalle California US|<200019>
24.23|Sam|Sam04@yahoo.com||Hong Kong|<200020>
123124.123|Lucas|Lucas_fighter2025@yahoo.com||New York US|<200040>

[download]
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
"Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."

In reply to Re: Build Sort dynamically by BrowserUk
in thread Build Sort dynamically by libvenus

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