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    <p>Totally from scratch:</p> <p>Printed Output:</p> <pre><code>Unsorted: 14-OCT-06 15-OCT-06 13-OCT-06 19-FEB-12 29-DEC-02 15-JAN-02 Sorted (Least recent to most recent): 15-JAN-02 29-DEC-02 13-OCT-06 14-OCT-06 15-OCT-06 19-FEB-12 </code></pre> <p>Code:</p> <pre><code>#!C:\Perl64 #Input Strings @inputs = ('14-OCT-06','15-OCT-06','13-OCT-06', '19-FEB-12', '29-DEC-02', '15-JAN-02'); print "Unsorted:\n"; foreach(@inputs){ print $_."\n"; } # Hash for Month : Number %months = ('JAN' =&gt; '01', 'FEB' =&gt; '02', 'MAR' =&gt; '03', 'APR' =&gt; '04', 'MAY' =&gt; '05', 'JUN' =&gt; '06', 'JUL' =&gt; '07', 'AUG' =&gt; '08', 'SEP' =&gt; '09', 'OCT' =&gt; '10', 'NOV' =&gt; '11', 'DEC' =&gt; '12'); # Hash for Number : Month %revmonths = ('01'=&gt;'JAN', '02' =&gt; 'FEB', '03' =&gt; 'MAR', '04' =&gt; 'APR', '05' =&gt; 'MAY', '06' =&gt; 'JUN', '07' =&gt; 'JUL', '08' =&gt; 'AUG', '09' =&gt; 'SEP', '10' =&gt; 'OCT', '11' =&gt; 'NOV', '12' =&gt; 'DEC'); # Rearrange the order to 'Year-Month-Day' @dates = (); foreach(@inputs){ my @split = split('-',$_); my @rearranged = reverse(@split); @rearranged[1] = $months{$rearranged[1]}; push(@dates, \@rearranged); } # Sort based on these three fields @sorted = sort { $a-&gt;[2] &lt;=&gt; $b-&gt;[2] } @dates; @sorted = sort { $a-&gt;[1] &lt;=&gt; $b-&gt;[1] } @sorted; @sorted = sort { $a-&gt;[0] &lt;=&gt; $b-&gt;[0] } @sorted; # Replace Month Number with Month name $size = @sorted; for $counter (0..$size-1){ my $ref = $sorted[$counter]; my @array = @$ref; my $num = $array[1]; $array[1] = $revmonths{$array[1]}; my @array = reverse(@array); $sorted[$counter] = \@array; } print "\nSorted (Least recent to most recent):\n"; foreach(@sorted){ my @temp = @$_; my $day = $temp[0]; my $month = $temp[1]; my $year = $temp[2]; print $day."-".$month."-".$year; print "\n"; } </code></pre>
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