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Top Forums Shell Programming and Scripting Perl: selective printing of lines Post 302554731 by durden_tyler on Monday 12th of September 2011 10:57:31 PM
Old 09-12-2011
Code:
$
$
$ cat data.txt
2 7 18 ggcgt  anna
2 9 24 kosss  Brenham
4 7 18 hhcjd  jenny
3 8 21 kkok   bush
2 7 18 hhchc  sam
0 8 21 jjdhs  sam
3 7 18 hhdjcc ross
$
$
$ perl -lne 'push @x, $_;
             END {
               @y = sort { (split " ", $a, 2)[1] <=> (split " ", $b, 2)[1]
                           or
                           (split " ", $a, 2)[0] <=> (split " ", $b, 2)[0]
                         } @x;
               foreach $i (@y) {
                 @k = split / /, $i;
                 print $i if ! defined $pk1 or ($k[1] != $pk1) or ($k[1] == $pk1 and $k[0] == $pk0);
                 $pk0 = $k[0]; $pk1 = $k[1]
               }
             }
            ' data.txt
2 7 18 ggcgt  anna
2 7 18 hhchc  sam
0 8 21 jjdhs  sam
2 9 24 kosss  Brenham
$
$

tyler_durden
This User Gave Thanks to durden_tyler For This Post:
 

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cachefslog(1M)						  System Administration Commands					    cachefslog(1M)

NAME
cachefslog - Cache File System logging SYNOPSIS
cachefslog [-f logfile | -h] cachefs_mount_point DESCRIPTION
The cachefslog command displays where CacheFS statistics are being logged. Optionally, it sets where CacheFS statistics are being logged, or it halts logging for a cache specified by cachefs_mount_point. The cachefs_mount_point argument is a mount point of a cache file system. All file systems cached under the same cache as cachefs_mount_point will be logged. OPTIONS
The following options are supported. You must be super-user to use the -f and -h options. -f logfile Specify the log file to be used. -h Halt logging. OPERANDS
cachefs_mount_point A mount point of a cache file system. USAGE
See largefile(5) for the description of the behavior of cachefslog when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes). EXAMPLES
Example 1: Checking the Logging of a directory. The example below checks if the directory /home/sam is being logged: example% cachefslog /home/sam not logged: /home/sam Example 2: Changing the logfile. The example below changes the logfile of /home/sam to /var/tmp/samlog: example# cachefslog -f /var/tmp/samlog /home/sam /var/tmp/samlog: /home/sam Example 3: Verifying the change of a logfile. The example below verifies the change of the previous example: example% cachefslog /home/sam /var/tmp/samlog: /home/sam Example 4: Halting the logging of a directory. The example below halts logging for the /home/sam directory: example# cachefslog -h /home/sam not logged: /home/sam EXIT STATUS
The following exit values are returned: 0 success non-zero an error has occurred. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
cachefsstat(1M), cachefswssize(1M), cfsadmin(1M), attributes(5), largefile(5) DIAGNOSTICS
Invalid path It is illegal to specify a path within a cache file system. SunOS 5.10 7 Feb 1997 cachefslog(1M)
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