Visit Our UNIX and Linux User Community


regular expression


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting regular expression
# 1  
Old 08-18-2011
regular expression

Could anyone of you please guide me on making correct regular expression to match the exact word or character

I have some numbers like 12345780 extn 1234
1234567 x 43545
13245678 Extn 454857
Code:
 if [[ "$NUMBER" = *[x]* ]]; then
                VAR3=`echo "$NUMBER" | nawk -F "[x]*" '{print $1 $2}'`
                echo insideif
                echo $VAR3
 fi

Output is below:
inside if
12345780 etn 1234
insideif
1234567 43545
insideif
13245678 Etn 454857

---------- Post updated at 07:49 AM ---------- Previous update was at 05:27 AM ----------

Could anyone of you have any suggestion to match exact word using regular exp ?

Last edited by vbe; 08-18-2011 at 10:27 AM.. Reason: code tags...
# 2  
Old 08-18-2011
Whats the value stored in variable NUMBER..?
# 3  
Old 08-18-2011
numbers mentioned in the first message of the thread.. like 12345780 extn 1234
# 4  
Old 08-18-2011
Quote:
Originally Posted by nram_krishna@ya
I have some numbers like 12345780 extn 1234
1234567 x 43545
13245678 Extn 454857

if [[ "$NUMBER" = *[x]* ]]; then
VAR3=`echo "$NUMBER" | nawk -F "[x]*" '{print $1 $2}'`
echo insideif
echo $VAR3
fi
Then try to pattern match it with command sed. You cannot pattern match as highlighted above.
Still not very clear with your requirement. Please brief again and post the exact contents of variable NUMBERS.
Code:
echo $NUMBERS| sed '/x/!d'

This User Gave Thanks to michaelrozar17 For This Post:
# 5  
Old 08-18-2011
Michael, Sorry for not being precise.
I was looking for whole word match using grep. Now i got it.
Below is the syntax i used..
Code:
grep "\<[Ee][Xx][tT]\>"

Thanks for all your help!

Last edited by Scott; 08-18-2011 at 02:38 PM.. Reason: Code tags, PLEASE...

Previous Thread | Next Thread
Test Your Knowledge in Computers #239
Difficulty: Easy
In March 1970, the ARPANET reached the East Coast of the United States, when an IMP at the Department of Energy in Washington, DC was connected to the network.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Regular expression

I would like to extract "JDBC Thin Client" from (PROGRAM=JDBC Thin Client); and "C:\Python26\python.exe" from (PROGRAM=C:\Python26\python.exe); "txm_v_awsrf_db.pr" from (PROGRAM=txm_v_awsrf_db.pr). if input line like "(PROGRAM=)", it return unknown. Would you help suggest a regular... (4 Replies)
Discussion started by: cstsang
4 Replies

2. Shell Programming and Scripting

Regular expression

Can someone please explain me what does this mean? ^{1,50}$ (1 Reply)
Discussion started by: Anupam_Halder
1 Replies

3. UNIX for Dummies Questions & Answers

Regular expression help

Hi, I am quite knew to scripting and I am trying to get a regular expression to work to check that a user enters a valid version number such as 1 or 1.1 or 12.3 etc. I dont seem to be able to get it to work as it picks up versions such as 1.......2. I only want it to work with a single dot.... (12 Replies)
Discussion started by: frodo61
12 Replies

4. UNIX for Advanced & Expert Users

sed: -e expression #1, char 0: no previous regular expression

Hello All, I'm trying to extract the lines between two consecutive elements of an array from a file. My array looks like: problem_arr=(PRS111 PRS213 PRS234) j=0 while } ] do k=`expr $j + 1` sed -n "/${problem_arr}/,/${problem_arr}/p" problemid.txt ---some operation goes... (11 Replies)
Discussion started by: InduInduIndu
11 Replies

5. Programming

Perl: How to read from a file, do regular expression and then replace the found regular expression

Hi all, How am I read a file, find the match regular expression and overwrite to the same files. open DESTINATION_FILE, "<tmptravl.dat" or die "tmptravl.dat"; open NEW_DESTINATION_FILE, ">new_tmptravl.dat" or die "new_tmptravl.dat"; while (<DESTINATION_FILE>) { # print... (1 Reply)
Discussion started by: jessy83
1 Replies

6. Shell Programming and Scripting

Integer expression expected: with regular expression

CA_RELEASE has a value of 6. I need to check if that this is a numeric value. if not error. source $CA_VERSION_DATA if * ] then echo "CA_RELESE $CA_RELEASE is invalid" exit -1 fi + source /etc/ncgl/ca_version_data ++ CA_PRODUCT_ID=samxts ++ CA_RELEASE=6 ++ CA_WEEK_NO=7 ++... (3 Replies)
Discussion started by: ketkee1985
3 Replies

7. UNIX for Dummies Questions & Answers

ls with regular expression

I currently list and sort all the files in a directory which begin with an Upper Case C and end with the extension '#finished#'. Here is the command I use: ls -tr $currentDir/*.#finished# what i need to do now is list all the files in a directory that begin with upper case C and end... (3 Replies)
Discussion started by: rkgudde
3 Replies

8. Linux

Regular expression to extract "y" from "abc/x.y.z" .... i need regular expression

Regular expression to extract "y" from "abc/x.y.z" (2 Replies)
Discussion started by: rag84dec
2 Replies

9. Programming

What does the regular expression ['(^[^~]+~).*'] mean?

What does the regular expression +~).*'] mean while using it with regexec.When the string "RCHNUSNT35C~rs07/ASM-RS07" is used with the regular expression +~).*'] regexec gives an error. I know what regexec does,but i do not understand what this expression means wrt to this string... any help... (2 Replies)
Discussion started by: anupamar
2 Replies

10. Shell Programming and Scripting

Regular Expression + Aritmetical Expression

Is it possible to combine a regular expression with a aritmetical expression? For example, taking a 8-numbers caracter sequece and casting each output of a grep, comparing to a constant. THX! (2 Replies)
Discussion started by: Z0mby
2 Replies

Featured Tech Videos