Hi All,
I'm new to perl,
My requirement is to check if particular file exists.
e.g. filename.txt, filename1.txt, filename2.txt etc
I tried the below code:-
my $var1 = "filename.txt"
if ( -e ($var1 = ~ /file\w/))
{
print "File found \n";
}
else
{ print "File not found \n";
}
... (0 Replies)
Hi,
I have large files with fixed length fields or fields seperated by delimeter. I would like to do validation on some or all fields to check for numeric or date or characters etc.. I would like to write this in C++. Please let me know if any one have any ideas on this.
Thanks for all... (2 Replies)
I have the following:
HH:MM:SS
I want to use either % or # sign to remove :SS can somebody please provide me an example. I know how to do this in awk, but awk is too much
overhead for something this simple since I will be doing this in a loop a lot of times.
Thanks in advance to all... (2 Replies)
Hi All,
Following is the program that i have written in cygwin. The redirection of the unfound $param1 to error.txt file doesnt work.Can any one help?
#!/usr/bin/sh
fname=$1
sed 's/ //g' "$fname" > fname1
while read i
do
echo $i > file1
#param1 is script name
... (1 Reply)
I have a huge file that has roughly 30304 lines. I need to extract specific info from that file. For example,
Box 1 > *aaaaaaaajjjj*
> hbbvjvj
> jdnnfddllll
> *dgdfhfekwjh*
Box 2 > *aaaaaaa'aj'jjj*
> dse hkjuejef bfdw
> dyeee
> dsewq
> *dgdfhfekwjh*
>feweiuei
Box 3 > *aaaa"aaaaj"jjj*
>... (25 Replies)
Hello,
I have a file ( say file1) which has lines like below.
xxxx:xxxx,yyyy,1234,efgh
zzzz:zzzz,kkkk,pppp,1234,xxxx,uuuu,oooo
dddd:dddd
here the word before ":" ( ie: xxxx) is the file name and the string after : are also file names, but each file name separated by ","
In case of... (20 Replies)
Hi all,
I have 7 words
CAD
CD
HT
RA
T1D
T2D
BD
Now I have 1 file which contain data in large number of rows and columns
from 2 nd column onwards it contain any of these 7 words or may be more than one words among above 7 words:
these 7 names are present in starting from 2nd ... (7 Replies)
Hi
I need to do a patten match between files .
I am new to shell scripting and have come up with this so far. It take 50 seconds to process files of 2mb size . I need to tune this code as file size will be around 50mb and need to save time.
Main issue is that I need to search the pattern from... (2 Replies)
HI ,
I WANT TO RETRIVE IN BETWEEN DATA FROM PARENTHESIS AND I AM GETTING ERRORS WHILE RUN THE AWK.I HAVE 2 FILES AND WANT TO PROCESS 1ST FILE PATTERN TO 2ND FILE AND WRITES INTO OUTPUT FILE.THIS TIME I AM PUTTING WHERE EXACTLY I AM GETTING ERRORS.SO PLEASE HELP.
PATTERN_FILE.TXT
--------------... (1 Reply)
Discussion started by: andrew_11
1 Replies
LEARN ABOUT MOJAVE
ptargrep
PTARGREP(1) Perl Programmers Reference Guide PTARGREP(1)NAME
ptargrep - Apply pattern matching to the contents of files in a tar archive
SYNOPSIS
ptargrep [options] <pattern> <tar file> ...
Options:
--basename|-b ignore directory paths from archive
--ignore-case|-i do case-insensitive pattern matching
--list-only|-l list matching filenames rather than extracting matches
--verbose|-v write debugging message to STDERR
--help|-? detailed help message
DESCRIPTION
This utility allows you to apply pattern matching to the contents of files contained in a tar archive. You might use this to identify all
files in an archive which contain lines matching the specified pattern and either print out the pathnames or extract the files.
The pattern will be used as a Perl regular expression (as opposed to a simple grep regex).
Multiple tar archive filenames can be specified - they will each be processed in turn.
OPTIONS --basename (alias -b)
When matching files are extracted, ignore the directory path from the archive and write to the current directory using the basename of
the file from the archive. Beware: if two matching files in the archive have the same basename, the second file extracted will
overwrite the first.
--ignore-case (alias -i)
Make pattern matching case-insensitive.
--list-only (alias -l)
Print the pathname of each matching file from the archive to STDOUT. Without this option, the default behaviour is to extract each
matching file.
--verbose (alias -v)
Log debugging info to STDERR.
--help (alias -?)
Display this documentation.
COPYRIGHT
Copyright 2010 Grant McLean <grantm@cpan.org>
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.18.2 2018-08-17 PTARGREP(1)