473,387 Members | 1,942 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,387 software developers and data experts.

File Handling

How to delete a line from text file in perl
Jul 27 '06 #1
1 1851
One way is
open(IN, ">filename);
$line=<STDIN>;
seek(0,$line,IN);
print IN "";
close(IN);

Another Way
open(IN, "filename");
@arr=<IN>;
close(IN);
open(OUT, ">$filename");
$line=<STDIN>;
$count =0;
foreach $line_no (@arr);
{
if($count == $line){}
else
print OUT $line_no;
}

--Amit V Gadgil
Aug 1 '06 #2

Sign in to post your reply or Sign up for a free account.

Similar topics

9
by: Hans-Joachim Widmaier | last post by:
Hi all. Handling files is an extremely frequent task in programming, so most programming languages have an abstraction of the basic files offered by the underlying operating system. This is...
1
by: Sean W. Quinn | last post by:
Hey folks, I have a question regarding file handling, and the preservation of class structure. I have a class (and I will post snippets of code later in the post) with both primitive data...
5
by: John Douglass | last post by:
I'm fairly new to doing involved file i/o and I came across something weird with a program I'm writing (modifying MIDI data, if it makes any difference). With some input files, when I modify data...
8
by: Gabe Moothart | last post by:
Hi, I'm writing a windows service which interacts with a separate process. Basically, it calls a process which creates a file, and then my service reads that file. The problem is, the external...
14
by: Al Smith | last post by:
I need help in implementing proper error handling. I am trying to upload a file based on the sample code below. The code works well except if the file selected is too big. I do know about the...
1
by: laredotornado | last post by:
Hi, I'm using PHP 4.4.4 on Apache 2 on Fedora Core 5. PHP was installed using Apache's apxs and the php library was installed to /usr/local/php. However, when I set my "error_reporting"...
5
by: Digital Puer | last post by:
I fixed a bug today that went against my intuition. I am on Linux. I had a class that fopen'ed some files. When I called delete on these objects, I expected that the files would be closed...
19
by: rmr531 | last post by:
First of all I am very new to c++ so please bear with me. I am trying to create a program that keeps an inventory of items. I am trying to use a struct to store a product name, purchase price,...
5
AdrianH
by: AdrianH | last post by:
Assumptions I am assuming that you know or are capable of looking up the functions I am to describe here and have some remedial understanding of C++ programming. FYI Although I have called...
5
by: kailashchandra | last post by:
I am trying to upload a file in php,but it gives me error msg please Help me? My Code is like below:- i have one php file named upload.php and i have another html file named upload.html and...
0
by: taylorcarr | last post by:
A Canon printer is a smart device known for being advanced, efficient, and reliable. It is designed for home, office, and hybrid workspace use and can also be used for a variety of purposes. However,...
0
by: aa123db | last post by:
Variable and constants Use var or let for variables and const fror constants. Var foo ='bar'; Let foo ='bar';const baz ='bar'; Functions function $name$ ($parameters$) { } ...
0
by: ryjfgjl | last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
0
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
0
BarryA
by: BarryA | last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
1
by: nemocccc | last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
1
by: Sonnysonu | last post by:
This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...
0
by: Hystou | last post by:
There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
0
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.