Perl equivalent substitution


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Perl equivalent substitution
# 1  
Old 09-17-2013
Perl equivalent substitution

hi Geeks,
my input file contains data like =>
Code:
[Songspk.name] 53 - Deewana Kar Raha Hai.mp3
[Songspk.name] 54 - Hale Dil.mp3
[Songspk.name] 55 - Ishq Sufiyana.mp3
[Songspk.name] 56 - Abhi Kuch Dino Se.mp3
[Songspk.name] 57 - Pee Loon Hoto Ki Sargam.mp3

I had used sed command to remove the prefix from the file name like
Code:
sed 's/^\[.*- \(.*.mp3\)/\1/' file

it gives me the perfect result. but now I want the same result by using the perl substitution.

I tried this command
Code:
perl -e 's/^\[.*- \(.*.mp3\)/\1/' file

but unfortunately it doesn't return anything and echo $? returns 0.

Kindly advise .. thanks in advance.

-Lohit.

Last edited by Scott; 09-17-2013 at 03:04 PM.. Reason: Code tags
# 2  
Old 09-17-2013
Try:
Code:
perl -pe 's/^\[.*- \(.*.mp3\)/\1/' file

This User Gave Thanks to bartus11 For This Post:
# 3  
Old 09-17-2013
I don't think you need to escape ( in a perl regex. But perl -e doesn't work that way, it expects a perl program, not a sed statement.

Your regex looks more complicated than it needs to be, though -- why match the entire name, and put back part of it, instead of just matching the part you want to delete? Then you don't need any of sed or perl's advanced features.

Code:
$ echo "[a b c d e f g] qwerty.mp3" | sed 's/^\[[^]]*\] *//'

qwerty.mp3

$

This User Gave Thanks to Corona688 For This Post:
# 4  
Old 09-17-2013
Right. Brackets' escapes are unnecessary in Perl regexes:
Code:
perl -pe 's/^\[.*- (.*.mp3)/\1/' file

This User Gave Thanks to bartus11 For This Post:
# 5  
Old 09-18-2013
thank you very much guys Smilie
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Perl : Perl equivalent to the ksh | and ;

Ive been trying to move to Perl. It has been a struggle. My question is, is there a good resource that explains nesting statements. As an example. To change primary Factory CTS 1.9.0(46) P1 *Slot 1 CTS 1.10.2(42) P1 To primary *Slot 1 CTS 1.10.2(42) P1 ... (5 Replies)
Discussion started by: popeye
5 Replies

2. Shell Programming and Scripting

What is the equivalent of NR (awk) in perl?

Hello, I searched online; it seems that perl use $NR as NR in awk; however it does not work for me. For example, how to re-write the following awk using perl: awk '{ print NR}' inputfile---------- Post updated at 01:55 PM ---------- Previous update was at 12:49 PM ---------- I found... (2 Replies)
Discussion started by: littlewenwen
2 Replies

3. Shell Programming and Scripting

grep -v equivalent in perl

I have to do grep -v in a perl script. I want to exclude blank lines and lines having visitor. #grep -v visitor abc.txt |grep '.' file:abc.txt 1340 not booked 16D:D9 tourist 8 1341 not booked 16C:D4 tourist 25 1342 not booked 16D:C4 visitor 7 1343 not booked 01C:D9 visitor 6 1344... (4 Replies)
Discussion started by: dynamax
4 Replies

4. Shell Programming and Scripting

need perl equivalent

Dear All, Good day, can any of you help me in the following problem: I need to find the perl equivalent for the following commandline grep characters |awk '{print \$2}'Expecting your reply and thanks in advance. Warm regards Fredrick. (4 Replies)
Discussion started by: Fredrick
4 Replies

5. Shell Programming and Scripting

Regular expression matching in BASH (equivalent of =~ in Perl)

In Perl I can write a condition that evaluates a match expression like this: if ($foo =~ /^bar/) { do blah blah blah } How do I write this in shell? What I need to know is what operator do I use? The '=~' doesn't seem to fit. I've tried different operators, I browsed the man page for... (3 Replies)
Discussion started by: indiana_tas
3 Replies

6. Shell Programming and Scripting

Bash equivalent of perl's pack function ?

Is there an equivalent of perl's pack function in bash ? Or in other words, how can I achieve the same thing in bash ? Much appreciated. (1 Reply)
Discussion started by: NewDeb
1 Replies

7. Shell Programming and Scripting

strtok equivalent in perl

Hi All, Is their any equivalent for strtok (in c) to use in perl script. Thanks in advance. JS (1 Reply)
Discussion started by: jisha
1 Replies

8. Shell Programming and Scripting

perl equivalent to grep -c

Guess the subject lines says it all. What is the perl equivalent to grep -c -c, --count Suppress normal output; instead print a count of match- ing lines for each input file. With the -v, --invert- match option (see below), count non-matching lines. ... (6 Replies)
Discussion started by: popeye
6 Replies

9. Shell Programming and Scripting

export equivalent command in PERL

Hi I need an equivalent command in PERL for the following. export LC_ALL=C; I hope this is the command. Please confirm this and correct me if i am wrong $ENV{LC_ALL}="C"; Thanks and Regards Ammu (1 Reply)
Discussion started by: ammu
1 Replies

10. Shell Programming and Scripting

Perl equivalent of ksh if / echo statement

Is there an equivalent perl statement for the following ksh statement ? example if then ... else ... fi (2 Replies)
Discussion started by: gefa
2 Replies
Login or Register to Ask a Question