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Full Discussion: How to read file line by line and compare subset of 1st line with 2nd?
Top Forums Shell Programming and Scripting How to read file line by line and compare subset of 1st line with 2nd? Post 302926471 by derekludwig on Monday 24th of November 2014 03:33:33 PM
Old 11-24-2014
If you want to compare the 3rd field of adjacent records:
Code:
awk FS="|" 'prev != $3 { print; } { prev = $3; }'

But result (output) is desired?
 

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LEARN ABOUT CENTOS

ldns_dname_compare

ldns(3) 						     Library Functions Manual							   ldns(3)

NAME

       ldns_dname_compare, ldns_dname_interval

SYNOPSIS

       #include <stdint.h>
       #include <stdbool.h>

       #include <ldns/ldns.h>

       int ldns_dname_compare(const ldns_rdf *dname1, const ldns_rdf *dname2);

       int ldns_dname_interval(const ldns_rdf *prev, const ldns_rdf *middle, const ldns_rdf *next);

DESCRIPTION

       ldns_dname_compare() Compares the two dname rdf's according to the algorithm for ordering in RFC4034 Section 6.
	      dname1: First dname rdf to compare
	      dname2: Second dname rdf to compare
	      Returns -1 if dname1 comes before dname2, 1 if dname1 comes after dname2, and 0 if they are equal.

       ldns_dname_interval()  check if middle lays in the interval defined by prev and next prev <= middle < next. This is usefull for nsec check-
	      ing
	      prev: the previous dname
	      middle: the dname to check
	      next: the next dname return 0 on error or unknown, -1 when middle is in the interval, +1 when not

AUTHOR

       The ldns team at NLnet Labs. Which consists out of Jelte Jansen and Miek Gieben.

REPORTING BUGS

       Please report bugs to ldns-team@nlnetlabs.nl or in our bugzilla at http://www.nlnetlabs.nl/bugs/index.html

COPYRIGHT

       Copyright (c) 2004 - 2006 NLnet Labs.

       Licensed under the BSD License. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

SEE ALSO

       ldns_dname_is_subdomain.  And perldoc Net::DNS, RFC1034, RFC1035, RFC4033, RFC4034  and RFC4035.

REMARKS

       This manpage was automaticly generated from the ldns source code by use of Doxygen and some perl.

								    30 May 2006 							   ldns(3)
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