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Full Discussion: selecting and deleting specific lines with condition
Top Forums Shell Programming and Scripting selecting and deleting specific lines with condition Post 302554851 by rwuerth on Tuesday 13th of September 2011 07:45:45 AM
Old 09-13-2011
Quote:
Now if I want to delete those selected lines, what command should I should use?
Simply negate the tests so you will print the data line if it is not a part
of the "set" array, and print all lines that don't start with "|" as below,
assuming you want to see all the headers and other non data information.

Code:
#!/usr/bin/awk -f
 
 BEGIN  {
   i=0                   # <--- Not needed anymore. Delete
   for (n=1; n<=8; n++) set[n] = n;
   for (n=9; n<=49; n+=8) {
     set[n] = n 
     set[n+7] = n+7 
   };
   for (n=57; n<=64; n++) set[n] = n;
 }
 
 ($1 == "|") {
     split($3, res1, "@"); split($6, res2, "@");
     if ( ! (res1[1] in set) && ! (res2[1] in set) ) #<--- negate tests
     {
       print;
     }
 
  }
 
  ($1 != "|") { print; }            # <--- prints headers and other lines

Last edited by rwuerth; 09-14-2011 at 10:50 AM.. Reason: marked i=0 as not needed.
This User Gave Thanks to rwuerth For This Post:
vjramana
 

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LEARN ABOUT REDHAT

head

HEAD(1) 								FSF								   HEAD(1)

NAME

       head - output the first part of files

SYNOPSIS

       head [OPTION]... [FILE]...

DESCRIPTION

       Print  first  10 lines of each FILE to standard output.	With more than one FILE, precede each with a header giving the file name.  With no
       FILE, or when FILE is -, read standard input.

       Mandatory arguments to long options are mandatory for short options too.

       -c, --bytes=SIZE
	      print first SIZE bytes

       -n, --lines=NUMBER
	      print first NUMBER lines instead of first 10

       -q, --quiet, --silent
	      never print headers giving file names

       -v, --verbose
	      always print headers giving file names

       --help display this help and exit

       --version
	      output version information and exit

       SIZE may have a multiplier suffix: b for 512, k for 1K, m for 1 Meg.

AUTHOR

       Written by David MacKenzie.

REPORTING BUGS

       Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT

       Copyright (C) 2002 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

       The  full documentation for head is maintained as a Texinfo manual.  If the info and head programs are properly installed at your site, the
       command

	      info head

       should give you access to the complete manual.

head (coreutils) 4.5.3						   February 2003							   HEAD(1)
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