Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: awk word boundaries not working
Top Forums Shell Programming and Scripting awk word boundaries not working Post 302928482 by junior-helper on Friday 12th of December 2014 04:15:29 AM
Old 12-12-2014
Seems like variables cannot be used as part of a regex enclosed in slashes. Apart from that, \b is a escape sequence for backspace...

Try this:
Code:
$ echo " ECHO" | awk '{ q="ECHO" ; if ( $0 ~ " " q " " )  print "HELLO" ; }'
$ echo "ECHO " | awk '{ q="ECHO" ; if ( $0 ~ " " q " " )  print "HELLO" ; }'
$ echo " ECHO " | awk '{ q="ECHO" ; if ( $0 ~ " " q " " )  print "HELLO" ; }'
HELLO
$ echo " ECHO  " | awk '{ q="ECHO" ; if ( $0 ~ " " q " " )  print "HELLO" ; }'
HELLO
$ echo " ECHO  " | awk '{ q="ECHO" ; if ( $0 == " " q " " )  print "HELLO" ; }'
$

Hope this helps.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Word boundaries in GAWK?

I wanted to use GAWK's 'word boundary' feature but can't get it to work. Doesn't GAWK support \<word\>? Sample record: Title Bats in the fifth act of Chushingura (top); the... (6 Replies)
Discussion started by: Bubnoff
6 Replies

2. Programming

key_t type max length or boundaries value

Hello, In shared memory, when using shmget function, first parameter is ket_t key. I know it is an integer type, but length of it is system dependent. That means may not be have integer's ranges. What is range of key_t in Linux? Is it different in distros, for example in ubuntu & fedora? (2 Replies)
Discussion started by: pronetin
2 Replies

3. UNIX for Dummies Questions & Answers

grep for word not working

Hi All..I need a help i am trying to find a word using below script whereas the word exists in my file nitin.txt as a directory but still i am getting "word not found" output..Your suggestions welcomed.: #to check for existence of nitin #!/bin/bash cd /apps/uat1/deploy/app ls -lrt >... (4 Replies)
Discussion started by: nattynitin
4 Replies

4. UNIX for Advanced & Expert Users

Awk expressions working & not working

Hi, Putting across a few awk expressions. Apart from the last, all of them are working. echo a/b/c | awk -F'/b/c$' '{print $1}' a echo a/b/c++ | awk -F'/b/c++' '{print $1}' a echo a/b/c++ | awk -F'/b/c++$' '{print $1}' a/b/c++ Request thoughts on why putting a '$' post double ++... (12 Replies)
Discussion started by: vibhor_agarwali
12 Replies

5. UNIX for Dummies Questions & Answers

Find EXACT word in files, just the word: no prefix, no suffix, no 'similar', just the word

I have a file that has the words I want to find in other files (but lets say I just want to find my words in a single file). Those words are IDs, so if my word is ZZZ4, outputs like aaZZZ4, ZZZ4bb, aaZZZ4bb, ZZ4, ZZZ, ZyZ4, ZZZ4.8 (or anything like that) WON'T BE USEFUL. I need the whole word... (6 Replies)
Discussion started by: chicchan
6 Replies

6. Shell Programming and Scripting

sed working as uniq 1st word only

Hello, everyone. I am having trouble figuring out sed command which emulates uniq. The task I want to do is that 2 consecutive lines in file should be considered the same using the first word only. Example: cat tmp.txt ddd eee aaa bbb ccc ddd eee fff asd fdd asd fdd bbb aaa bbb asd fgh... (4 Replies)
Discussion started by: motorcek
4 Replies

7. Shell Programming and Scripting

awk Script: removing periodic boundaries

SOLVED, thank you! Edit2: Good news everyone, I managed to get it down to a "simple" problem, but I still have some syntax issues. Here is the code which troubles me: awk 'BEGIN{x2=0;x1=0;crit=0;} $1 < 1000000 {x2=$4; diffx=x2-x1; x1=x2; diffx > 3.6 ? {crit=1} : {crit=0};... (2 Replies)
Discussion started by: Consti
2 Replies

8. Shell Programming and Scripting

awk - why this is not working? trying next word!

Hi Experts, Can you please advise , why I am not able to make it work, or why this is not working: I spent quite a lot of time on this figuring out , but not working, file : This is a test file thanks for your reply This is another file again Have a nice day this is a small file... (3 Replies)
Discussion started by: rveri
3 Replies

9. Shell Programming and Scripting

How do i replace a word ending with "key" using awk excpet for one word?

echo {mbr_key,grp_key,dep_key,abc,xyz,aaa,ccc} | awk 'gsub(/^|abc,|$/,"") {print}' Required output {grp_key,xyz,aaa,ccc} (5 Replies)
Discussion started by: 100bees
5 Replies

10. UNIX for Beginners Questions & Answers

How to search for a word in column header that fully matches the word not partially in awk?

I have a multicolumn text file with header in the first row like this The headers are stored in an array called . which contains I want to search for each elements of this array from that multicolumn text file. And I am using this awk approach for ii in ${hdr} do gawk -vcol="$ii" -F... (1 Reply)
Discussion started by: Atta
1 Replies

LEARN ABOUT OSX

echo

ECHO(1) 						    BSD General Commands Manual 						   ECHO(1)

NAME

     echo -- write arguments to the standard output

SYNOPSIS

     echo [-n] [string ...]

DESCRIPTION

     The echo utility writes any specified operands, separated by single blank (' ') characters and followed by a newline ('
') character, to the
     standard output.

     The following option is available:

     -n    Do not print the trailing newline character.  This may also be achieved by appending 'c' to the end of the string, as is done by iBCS2
	   compatible systems.	Note that this option as well as the effect of 'c' are implementation-defined in IEEE Std 1003.1-2001
	   (``POSIX.1'') as amended by Cor. 1-2002.  Applications aiming for maximum portability are strongly encouraged to use printf(1) to sup-
	   press the newline character.

     Some shells may provide a builtin echo command which is similar or identical to this utility.  Most notably, the builtin echo in sh(1) does
     not accept the -n option.	Consult the builtin(1) manual page.

EXIT STATUS

     The echo utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     builtin(1), csh(1), printf(1), sh(1)

STANDARDS

     The echo utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'') as amended by Cor. 1-2002.

BSD
								  April 12, 2003							       BSD
All times are GMT -4. The time now is 11:38 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy