Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Begin/End blocks in awk: confused
Top Forums Shell Programming and Scripting Begin/End blocks in awk: confused Post 302882390 by newbie2010 on Monday 6th of January 2014 03:15:28 PM
Old 01-06-2014
Begin/End blocks in awk: confused
I am trying to understand how to use the END block in awk without much success. I have this script that I found:

Code:
gawk '{count[$2]++; keyword[$2] = $1}
if (count[k] == 3) keyword[k] = "order this"
else print keyword[k] " " k
}
}' << orderfile

Is that the way that the END block should be used? I am confused; I thought that the Begin block went at the beginning of the scripts. Any one have an example of how BEGIN could be used here? Or does END only apply? I thought BEGIN was when the input was being read.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

BEGIN END questions

Why would you need to use this in a script? Why can't you just use print to print out what you want printed in the begining and print for what you want at the end. So this: nawk 'BEGIN {print "this is the first line"} {print $1 $2 $3} {print $5 $6} END {print "this is the last line"}' ... (2 Replies)
Discussion started by: llsmr777
2 Replies

2. Shell Programming and Scripting

begin end detection

Hi all, i am new to scripting. i need to write a code to detect begin and end of word that either begins or ends with t,th,d,dh,s,sh i have a set of words in a file containg one word per line. let the filename be aaa.txt. i have an another file bbb.txt which has two lines, just specifying the... (7 Replies)
Discussion started by: blkanth
7 Replies

3. Shell Programming and Scripting

awk BEGIN END and string matching problem

Hi, Contents of BBS-list file: foo foo foo awk ' BEGIN { print "Analysis of \"foo\"" } /foo/ { ++n } END { print "\"foo\" appears", n, "times." }' BBS-list Output: Analysis of "foo" "foo" appears 3 times. awk ' (3 Replies)
Discussion started by: cola
3 Replies

4. Shell Programming and Scripting

Use of Begin IF ,END IF END not working in the sql script

Hi I have written a script .The script runs properly if i write sql queries .But if i use PLSQL commands of BEGIN if end if , end ,then on running the script the comamds are getting printed on the prompt . Ex :temp.sql After connecting to the databse at the sql prompt i type... (1 Reply)
Discussion started by: isha_1
1 Replies

5. UNIX for Dummies Questions & Answers

Dump to another file for a begin and end Pattern

Hi All , I am newbie to linux shell scripting , below are the contents of my log file , i want the lines between a begin pattern and a end pattern for an instance , my begin Pattern is "Transaction Begins for Usr" and end pattern is "Transaction Ends for Usr" into another file Sample file... (1 Reply)
Discussion started by: SARAVANANE
1 Replies

6. Shell Programming and Scripting

strange: sed and awk print at end instead of begin of line

Hi! I have a strange behaviour from sed and awk, but I'm not sure, if I'm doing something wrong: I have a list of words, where I want to add the following string at the end of each line: \;\;\;\;0\;1 I try like this: $ cat myfile | awk '{if ( $0 != "" ) print $0"\;\;\;\;0\;1"}' Result:... (5 Replies)
Discussion started by: regisl67
5 Replies

7. Shell Programming and Scripting

Get the sum of values in between begin and end in the file

Hi All, test file Begin Script Run at Thu Mar 14 09:24:16 PDT 2013 tst_accounts: ws zip: WS_out_20130313.tar.gz dat: test_20130313.dat count: 63574 loaded: xx pre-merge: xx post-merge: xx timestamp: Thu Mar 14 09:30:42 PDT 2013 tst_accounts: ws zip: WS_out_20130313.tar.gz dat: s_20130313.dat... (6 Replies)
Discussion started by: bmk
6 Replies

8. Shell Programming and Scripting

BEGIN and END format in awk

I'm new to awk, trying to understand the basics. I'm trying to reset the counter everytime the program gets a new file to check. I figured in the BEGIN part it would work, but it doesn't. #!/bin/awk -f BEGIN {counter=0} { sum=0 for ( i=1; i<=NF;... (1 Reply)
Discussion started by: guitarist684
1 Replies

9. Shell Programming and Scripting

Search ad replace using begin and end of the file

Hello Friends , Please help to create script for compare and replace if not matches of set of lines . * Primary* Servername Server1 Location R201 Rack 4 *End Primary* *Secondary* Server Name Server1 IPAddress 10.24.30.10 Application Apache *End of Secondary* Above... (4 Replies)
Discussion started by: rnary
4 Replies

10. Shell Programming and Scripting

In ksh script what is this BEGIN and END in this function?

Can Someone please explain why BEGIN and END statement is used inside function? How does that help in scripting? function fileformatting { CleanupMask="xXxX" sed 's/^.//' < ${AllFile} > ${AllFile}.tmp echo $(wc -l ${AllFile}.tmp) `awk -v CleanupMask=${CleanupMask} ' BEGIN... (2 Replies)
Discussion started by: later_troy
2 Replies

LEARN ABOUT DEBIAN

nngrab

NNGRAB(1)						      General Commands Manual							 NNGRAB(1)

NAME

       nngrab - news retrieval by keyword (nn)

SYNOPSIS

       nngrab [ -c ] keyword

DESCRIPTION

       nngrab  invokes	nn on all USENET articles whose subject (or keyword) field(s) contain an instance of keyword.  nngrab is a fast equivalent
       for:
	    nn -mxX -s/keyword all

       For example,
	    nngrab tesla
       will retrieve items concerning Nikola Tesla.

       Keyword case is ignored unless -c is specified, and the keyword can be a regular expressions (escaped to avoid conflicts with  the  shell).
       For example,
	    nngrab "n.*tesla"

       The range of search includes all newsgroups on the system, including ones which are unsubscribed.

FILES

       $db/subjects   subject database

SEE ALSO

       nn(1), nnspew(8), egrep(1)

NOTES

       nngrab  can be much faster than the equivalent command shown above, if the tertiary news subject database generated by the nnspew(8) daemon
       exists.	To enable the faster operation, nnspew must be executed regularly by cron.

       nngrab uses egrep(1) to scan the subject database, so if you are not running fast egrep (GNU-style) this is all for naught.

       nngrab will use a subject database generated by nnspew independent of its age.  Thus, if you stop running nnspew, remember  to  remove  the
       subjects file as well.

BUGS

       Under version 6.4 onwards, search of the "Keywords:" field is not supported.
       Search on name is not possible either.

AUTHOR

       James A. Woods, NASA Ames Research Center
       E-mail: jaw@ames.arc.nasa.gov

4th Berkeley Distribution					    Release 6.6 							 NNGRAB(1)
All times are GMT -4. The time now is 11:46 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy