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Full Discussion: Using NR with two variables at the beginning of awk
Top Forums Shell Programming and Scripting Using NR with two variables at the beginning of awk Post 302327319 by ramkrix on Saturday 20th of June 2009 08:56:15 PM
Old 06-20-2009
Error Using NR with two variables at the beginning of awk
hi My requirement is this:
I have a file having around 100000 records pipe delimited. Now I want to compare record 1 with record 2 and similarly record3 with record 4, this goes on.. For this purpose i put a script as follows:

#!bin/ksh

ct_line=1
nxt_line=`expr ${ct_line} + 1`

awk -F "|" -v i=${ct_line} -v j=${nxt_line} '{print i j} NR==i {
ct_dt=$1
ct_name=$2
}
NR==j {
nxt_dt=$1
nxt_name=$2
}
{print ct_dt nxt_dt}
i+=1
j=i+1
' <infile.txt >outfile.txt

Expected output:
1 2
20090501 20090502

Actual Output:
1 2
20090501

Its not all processing NR==j.. Why??

If there is any otehr way to do it in awk??
I mean, I need to read two lines at a time and assign their values to respective variables and compare..?/

Its an urgent requirement.. plz help
 

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LEARN ABOUT PHP

hw_getobject

HW_GETOBJECT(3) 							 1							   HW_GETOBJECT(3)

hw_GetObject - Object record

SYNOPSIS

       mixed hw_getobject (int	$connection, mixed  $objectID, [string	$query])

DESCRIPTION

	Gets an object record. If the second parameter is an array of integer the function will

PARAMETERS

	      o $connection
		- The connection identifier.

	      o $objectID
		- The object identifier, or an array of identifiers.

	      o $query
		- The query string has the following syntax:

	      <expr> ::= "(" <expr> ")" |
			 "!" &lt;expr> |	  /* NOT */
			 <expr> "||" <expr> |  /* OR */
			 <expr> "&amp;&amp;" <expr> |  /* AND */
			 <attribute> <operator> <value>

	      <attribute> ::= /* any attribute name (Title, Author, DocumentType ...) */

	      <operator> ::= "=" |    /* equal */
			     "<" |    /* less than (string compare) */
			     ">" |    /* greater than (string compare) */
			     "~"      /* regular expression matching */

RETURN VALUES

	Returns the object record for the given object ID if the second parameter is an integer.

	If  the  second parameter is an array of integer the function will return an array of object records. In such a case the last parameter is
       also evaluated which is a query string.

SEE ALSO

       hw_getandlock(3), hw_getobjectbyquery(3).

PHP Documentation Group 													   HW_GETOBJECT(3)
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