Login or Register to Ask a Question and Join Our Community


Programming

perl - calculate the number of lines from particular files

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Programming perl - calculate the number of lines from particular files
# 8  
Old 07-13-2011
another way,

Tested in windows

Code:
perl -le "print ~~grep{/./}<>" test

Code:
perl -le "print~~grep/./,<>" test

# 9  
Old 07-13-2011
Quote:
Originally Posted by itkamaraj
another way,

Tested in windows

Code:
perl -le "print ~~grep{/./}<>" test

Code:
perl -le "print~~grep/./,<>" test

Nice, but I'd match on \S instead of ., since that's the way the original code was defining an empty line (no printable characters).
# 10  
Old 07-13-2011
Hi.

One method:
Code:
   How do I count the number of lines in a file?
       One fairly efficient way is to count newlines in the file. The
       following program uses a feature of tr///, as documented ...

more at man perlfaq5

and a wrapper for that:
Code:
NAME
       File::CountLines - efficiently count the number of line breaks in a
       file.

       Since different operating systems have different ideas of what a
       newline is, you can specifiy a "style" option ...

more at perldoc File/CountLines

Good luck ... cheers, drl
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Print number of lines for files in directory, also print number of unique lines

I have a directory of files, I can show the number of lines in each file and order them from lowest to highest with: wc -l *|sort 15263 Image.txt 16401 reference.txt 40459 richtexteditor.txt How can I also print the number of unique lines in each file? 15263 1401 Image.txt 16401... (15 Replies)
Discussion started by: spacegoose
15 Replies

2. UNIX for Dummies Questions & Answers

Command to split the files based on the number of lines in it

Hello Friends, Can anyone help me for the below requirement. I am having a file called Input.txt. My requirement is first check the count that is wc -l input.txt If the result of the wc -l Input.txt is less than 10 then don't split the Input.txt file. Where as if Input.txt >= 10 the split... (12 Replies)
Discussion started by: malaya kumar
12 Replies

3. Shell Programming and Scripting

Pasting files with different number of lines

Hi all, I tried to use the paste command to paste two files with different number of lines. e.g. file1 A 1 B 1 C 2 D 2 file2 A 2 B 3 C 4 D 4 E 4 (2 Replies)
Discussion started by: f_o_555
2 Replies

4. Shell Programming and Scripting

How to calculate mean in AWK? line by line several files, thousands of lines

I'm kinda stuck on this one, I have 7 files with 30.000 lines/file like this 050 0.023 0.504336 050 0.024 0.529521 050 0.025 0.538908 050 0.026 0.537035 I want to find the mean line by line of the third column from the files named like this: Stat-f-1.dat .... Stat-f-7.dat Stat-s-1.dat... (8 Replies)
Discussion started by: AriasFco
8 Replies

5. Shell Programming and Scripting

how can i find number of lines in files & subdirectories

how can i find number of lines in files & subdirectories ? (3 Replies)
Discussion started by: pcbuilder
3 Replies

6. Shell Programming and Scripting

perl script on how to count the total number of lines of all the files under a directory

how to count the total number of lines of all the files under a directory using perl script.. I mean if I have 10 files under a directory then I want to count the total number of lines of all the 10 files contain. Please help me in writing a perl script on this. (5 Replies)
Discussion started by: adityam
5 Replies

7. UNIX for Dummies Questions & Answers

Read directory files and count number of lines

Hello, I'm trying to create a BASH file that can read all the files in my working directory and tell me how many words and lines are in that file. I wrote the following code: FILES="*" for f in "$FILES" do echo -e `wc -l -w $f` done My issue is that my file is outputting in one... (4 Replies)
Discussion started by: jl487
4 Replies

8. Shell Programming and Scripting

Script to split files based on number of lines

I am getting a few gzip files into a folder by doing ftp to another server. Once I get them I move them to another location .But before that I need to make sure each gzip is not more than 5000 lines and split it up . The files I get are anywhere from 500 lines to 10000 lines in them and is in gzip... (4 Replies)
Discussion started by: gubbu
4 Replies

9. Shell Programming and Scripting

Number of *.txt files which have over n lines?

Can you help me please? I know that wc -l *.txt gives you the number of lines in each file. But how can i count the files that have over n lines? (4 Replies)
Discussion started by: dark_knight
4 Replies

10. Shell Programming and Scripting

Restore files by lines number!

Hello every 1 Happy new year ;) I have a problem when i've tried to write my shell scripts.. this what i've done Actually, i would like to restore the files that i have deleted by line number for example : 1 : filename1 2: filename2 3: filename3 then i can restore them by... (8 Replies)
Discussion started by: John_Smith
8 Replies
Login or Register to Ask a Question