02-06-2008
How to get the cell's value in a searched record ?
Quote:
Originally Posted by
rubin
AFAIK the problem lies in using single quotes in the second awk command. You are running a nested awk, so using single quotes again will confuse the initial outer awk script, (I ran into the same problem before).
So I'd suggest try to avoid the single quotes and use the other methods shown here to assign the variables.
Hope it helps.
Hey,
Could you please tell me, how to get a particular cell value using awk.
As far as I know, awk works on records.,
As :
--------------------------------------
mqsiaaa 123 888
mqsiddd 456 999
t2589gg 789 555
-------------------------------------
In the above table, say i search using $2 column and i want to get the value of $3 of that searched record.
awk '$2~/456/ { printf $3 > "filefilter"}' temp.txt
Means I want the 999 only corrosponding to the search, but as awk works on records and $3 represent whole third column, it used to give me
888
999
555
all the three values in filefilter., BUT i want only 999 (respective to the matched record and its 3rd cell value.)
How to achieve that ??
Do let me know.
Thanks in advance.
Varun.
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LEARN ABOUT MOJAVE
english
English(3pm) Perl Programmers Reference Guide English(3pm)
NAME
English - use nice English (or awk) names for ugly punctuation variables
SYNOPSIS
use English;
use English qw( -no_match_vars ) ; # Avoids regex performance penalty
# in perl 5.16 and earlier
...
if ($ERRNO =~ /denied/) { ... }
DESCRIPTION
This module provides aliases for the built-in variables whose names no one seems to like to read. Variables with side-effects which get
triggered just by accessing them (like $0) will still be affected.
For those variables that have an awk version, both long and short English alternatives are provided. For example, the $/ variable can be
referred to either $RS or $INPUT_RECORD_SEPARATOR if you are using the English module.
See perlvar for a complete list of these.
PERFORMANCE
NOTE: This was fixed in perl 5.20. Mentioning these three variables no longer makes a speed difference. This section still applies if
your code is to run on perl 5.18 or earlier.
This module can provoke sizeable inefficiencies for regular expressions, due to unfortunate implementation details. If performance matters
in your application and you don't need $PREMATCH, $MATCH, or $POSTMATCH, try doing
use English qw( -no_match_vars ) ;
. It is especially important to do this in modules to avoid penalizing all applications which use them.
perl v5.18.2 2014-01-06 English(3pm)