Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Difference between /text/ and "text" in awk

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Difference between /text/ and "text" in awk
# 8  
Old 01-25-2013
Within gsub, ther is no problem to use both?
Code:
awk '{gsub(/blue/,"orange")};1' data
awk '{gsub("blue","orange")};1' data

The first finds regex that contains blue
the second finds the string blue
correct?
# 9  
Old 01-25-2013
There is no problem, but the same difference applies between " .. " and / .. /
So that is not correct: the first matches the regex that contains blue and the second one as well...
# 10  
Old 01-25-2013
So in short:
Code:
$3 == /blue/   # has no meaning, is not valid syntax
$3 == "blue"   # exact string comparison
$3 ~ /blue/    # regex match (ERE constant)
$3 ~ "blue"    # regex match (string interpreted as ERE)
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Awk: Performing "for" loop within text block with two files

I am hoping to pull multiple strings from one file and use them to search within a block of text within another file. File 1PS001,001 HLK PS002,004 MWQ PS004,002 RXM PS004,006 DBX PS004,006 SBR PS005,007 ML PS005,009 DBR PS005,011 MR PS005,012 SBR PS006,003 RXM PS006,003 >SJ PS006,010... (11 Replies)
Discussion started by: jvoot
11 Replies

2. Shell Programming and Scripting

how to use "cut" or "awk" or "sed" to remove a string

logs: "/home/abc/public_html/index.php" "/home/abc/public_html/index.php" "/home/xyz/public_html/index.php" "/home/xyz/public_html/index.php" "/home/xyz/public_html/index.php" how to use "cut" or "awk" or "sed" to get the following result: abc abc xyz xyz xyz (8 Replies)
Discussion started by: timmywong
8 Replies

3. Shell Programming and Scripting

Using sed to find text between a "string " and character ","

Hello everyone Sorry I have to add another sed question. I am searching a log file and need only the first 2 occurances of text which comes after (note the space) "string " and before a ",". I have tried sed -n 's/.*string \(*\),.*/\1/p' filewith some, but limited success. This gives out all... (10 Replies)
Discussion started by: haggismn
10 Replies

4. UNIX for Dummies Questions & Answers

awk - difference between -F"," and BEGIN{FS=","}

in awk, what is the difference between: -F"," and BEGIN{FS=","} (2 Replies)
Discussion started by: locoroco
2 Replies

5. Shell Programming and Scripting

awk command to replace ";" with "|" and ""|" at diferent places in line of file

Hi, I have line in input file as below: 3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL My expected output for line in the file must be : "1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL" Can someone... (7 Replies)
Discussion started by: shis100
7 Replies

6. Shell Programming and Scripting

Extract text between two specified "constant" texts using awk

Hi All, From the title you may know that this question has been asked several times and I have done lot of Googling on this. I have a Wikipedia dump file in XML format. All the contents are in one XML file i.e. all different topics have been put in one XML file. Now I need to separate them and... (1 Reply)
Discussion started by: shoaibjameel123
1 Replies

7. Shell Programming and Scripting

cat $como_file | awk /^~/'{print $1","$2","$3","$4}' | sed -e 's/~//g'

hi All, cat file_name | awk /^~/'{print $1","$2","$3","$4}' | sed -e 's/~//g' Can this be done by using sed or awk alone (4 Replies)
Discussion started by: harshakusam
4 Replies

8. Shell Programming and Scripting

read -p "prompt text" foo say "read: bad option(s)" in Bourne-Shell

Hallo, i need a Prompting read in my script: read -p "Enter your command: " command But i always get this Error: -p: is not an identifier When I run these in c-shell i get this error /usr/bin/read: read: bad option(s) How can I use a Prompt in the read command? (9 Replies)
Discussion started by: wiseguy
9 Replies

9. UNIX for Dummies Questions & Answers

Explain the line "mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'`"

Hi Friends, Can any of you explain me about the below line of code? mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'` Im not able to understand, what exactly it is doing :confused: Any help would be useful for me. Lokesha (4 Replies)
Discussion started by: Lokesha
4 Replies

10. UNIX for Dummies Questions & Answers

Convert "text" to "packed-decimal"?

Is there a way with HP-UX Release 10.20 (but going to HP-UX 11) to convert a regular "text" file to a packed data format (such as is created by a Cobol program)? (2 Replies)
Discussion started by: HuskyJim
2 Replies
Login or Register to Ask a Question