Although I have found similar questions, I could not find
advice that could help with my problem. The issue:
I am trying to replace all occurrences of a regex, but
I cannot make the regex groups work together.
This is a simple input test file:
This is what the output should be:
This is my code:
The two groups
and
match the test file independently, but when
I put them together in the s///igm line, they do not work at all.
I read the perl regex introduction and tutorial, and
searched for hints where I am making a mistake, with no avail.
Thank you for any help or indication on how to solve this problem.
Last edited by samask; 12-28-2011 at 02:03 PM..
Reason: minor correction
1.- while (<>) reads one line at a time and your regex tries to work over multiple lines.
2.- '^' marks the beginning of the line and it is zero-width, put it out of the parentheses.
3.- There is no need of the 'g' switch. Your regex only will match at most once.
4.- No need of 'i' switch. You are not using any alphabetic character.
I am having trouble with regex capturing groups, For Ex :
I am having a file with
ABC CDLF SFSDFK PRIMARY INDEX(XYZ,DEF,GHI);
XYZ FLJ SDFKLD; PRIMARY INDEX(ABC);
BHI SDKFLFLSFD PRIMARY INDEX (QWE , RTY , LHJ);
My output should be :
ABC XYZ,DEF,GHI
XYZ ABC
BHI ... (10 Replies)
I starting teaching myself python and am stuck on trying to understand why I am not getting the output that I want. Long story short, I am using PDB for debugging and here my function in which I am having my issue:
import re
...
...
...
def find_all_flvs(url):
soup =... (1 Reply)
Hi,
I'm trying to match the front and back of a sequence. It works when there is an exact match (obviously), but I need the regex to be more flexible. When we get strings of nucleotides sometimes their prefixes and suffixes aren't exact matches. Sometimes there will be an extra letter and... (2 Replies)
i have a script in which i need to skip comments, and i am able to achieve it partially...
IN text file:
{****************************
{test : test...test }
Script:
while (<$fh>)
{
push ( @data, $_);
}
if ( $data =~ m/(^{\*+$)/ ){
}
With the above match i am... (5 Replies)
Hi,
I find it really strange while writing a simple regex to match and print the matched string,
dibyajyo@fwtest:~ #perl -e '$x = "root@rashmi>"; print "matched string:$1\n" if ($x =~ /(root@rashmi)/);'
matched string:root
dibyajyo@fwtest:~ #perl -e '$x = "root@rashmi>"; print... (1 Reply)
Thanks for giving your time and effort to answer questions and helping newbies like me understand awk.
I have a huge file, millions of lines, so perl takes quite a bit of time, I'd like to convert these perl one liners to awk.
Basically I'd like all lines with ISA sandwiched between... (9 Replies)
I have a requirement - replace specified positions in a string with a character. I found perl regex useful for this approach. however, I am facing the following issue.
The target file 'temp' contains -
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
The goal is to convert... (5 Replies)
I am having trouble parsing rpm filenames in a shell script.. I found a snippet of perl code that will perform the task but I really don't have time to rewrite the entire script in perl. I cannot for the life of me convert this code into something sed-friendly:
if ($rpm =~ /(*)-(*)-(*)\.(.*)/)... (1 Reply)
Hello,
I am searching all over the place for this, just not finding anything solid :(
I want to do be able to access the groups that are matched with grep (either with extended regex, or perl compatible regex). For instance:
echo "abcd" | egrep "a(b(c(d)))"
Of course this returns... (1 Reply)
Hello,
I am trying to use the CDE File Manager in AIX to filter out files that I want to be hidden in the file manager. It gives me a script box that I can supposedly enter a regex into if I want to filter out additional file types.
Example: "Also Hide:"_______________
I can put... (0 Replies)