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Full Discussion: date(ddmmyyyy) sorting
Top Forums Shell Programming and Scripting date(ddmmyyyy) sorting Post 302579862 by balajesuri on Tuesday 6th of December 2011 11:52:57 PM
Old 12-07-2011
input.txt:
Code:
20110730
20110730
20110731
20110731
20110801
20110801
20110801
20110813
20110815
01062011
01062011

script.sh:
Code:
#! /bin/bash
while read x
do
    echo $x | egrep -q "20[0-9][0-9](0[1-9]|1[0-2])(0[1-9]|[12][0-9]|3[01])"
    if [ $? -eq 0 ]
    then
        y=`echo $x | cut -c7-8``echo $x | cut -c5-6``echo $x | cut -c1-4`
        sed -i "s/$x/$y/" input.txt
    fi
done < input.txt
sort -n -k1.5 -k1.3 -k1 input.txt

Code:
$ ./script.sh
01062011
01062011
30072011
30072011
31072011
31072011
01082011
01082011
01082011
13082011
15082011


Last edited by balajesuri; 12-07-2011 at 01:06 AM..
 

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FPRINTF(3)								 1								FPRINTF(3)

fprintf - Write a formatted string to a stream

SYNOPSIS
int fprintf (resource $handle, string $format, [mixed $args], [mixed $...]) DESCRIPTION
Write a string produced according to $format to the stream resource specified by $handle. PARAMETERS
o $handle -A file system pointer resource that is typically created using fopen(3). o $format - See sprintf(3) for a description of $format. o $args - o $... - RETURN VALUES
Returns the length of the string written. EXAMPLES
Example #1 fprintf(3): zero-padded integers <?php if (!($fp = fopen('date.txt', 'w'))) { return; } fprintf($fp, "%04d-%02d-%02d", $year, $month, $day); // will write the formatted ISO date to date.txt ?> Example #2 fprintf(3): formatting currency <?php if (!($fp = fopen('currency.txt', 'w'))) { return; } $money1 = 68.75; $money2 = 54.35; $money = $money1 + $money2; // echo $money will output "123.1"; $len = fprintf($fp, '%01.2f', $money); // will write "123.10" to currency.txt echo "wrote $len bytes to currency.txt"; // use the return value of fprintf to determine how many bytes we wrote ?> SEE ALSO
printf(3), sprintf(3), sscanf(3), fscanf(3), vsprintf(3), number_format(3). PHP Documentation Group FPRINTF(3)
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