I have a problem that I want to insert and delete some chars in the middle of a file. fopen() and fdopen() just allow to append at the end.
Is there any simple method or existing library that allow these actions? Thanks in advance.:confused: (7 Replies)
Script 1
Pre-requisites
Create a file with x amount of lines in it, the content of your choice.
Write a script that takes two arguments. The first being a line of text, the second being your newly created file. The script should take the first argument and insert it into the very top (the... (3 Replies)
I wrote a script like
#!/bin/bash
echo $1 > temp
cat $2 >> temp
mv temp $2
now I have problem appending the above script(only using bash shell) so that it now inserts the first argument into the middle of the file.
I have tried using $(('wc -l < file' / 2 ))
but invain so could any one... (4 Replies)
how to insert one file into another file not by concatenating as usual done.
file1
A B
C D
E F
G H
I J
K L
file2
23455
33444
33334
33345
Output shud be
23455
A B
C D (4 Replies)
Can anyone help me pls? I want to add a text into the middle of file.
I've writtenthe following script
text to add="$1"
file="$2"
lines=$(wc -l $2)
half_lines=$(expr $lines / 2)
head -$half_lines $2 > temp
echo "text to add" >> temp
((half_lines=$half_lines + 1))
tail -$half_lines $2... (6 Replies)
Hey guys, how do we take a line of text as an argument from a user and then insert it in the middle of a file irrespective of the number of lines in the file. I am trying to do this without SED or AWK. Inserting it in the beginning and at the end is easy, but i am trying to accomplish inserting... (6 Replies)
I have tried
sed '/6/a text_to_inserted' file > newfile
but this inserts test_to_insert at random places in file and i want it in specific location, which is line 6.
can anyone help.... (6 Replies)
Hi I am trying to write a bash script to add a line of text to the middle of a file.
The way I worked it out was to calculate the number of lines and divide by 2. The file I am using is called newfile and it just contains lines of data.
The new file I have created I have called midfile and... (7 Replies)
Perl::Critic::Policy::ControlStructures::ProhibitLabelsWUserpContPerl::Critic::Policy::ControlStructures::ProhibitLabelsWithSpecialBlockNames(3pm)NAME
Perl::Critic::Policy::ControlStructures::ProhibitLabelsWithSpecialBlockNames - Don't use labels that are the same as the special block
names.
AFFILIATION
This Policy is part of the core Perl::Critic distribution.
DESCRIPTION
When using one of the special Perl blocks "BEGIN", "END", "CHECK", "INIT", and "UNITCHECK", it is easy to mistakenly add a colon to the end
of the block name. E.g.:
# a BEGIN block that gets executed at compile time.
BEGIN { <...code...> }
# an ordinary labeled block that gets executed at run time.
BEGIN: { <...code...> }
The labels "BEGIN:", "END:", etc. are probably errors. This policy prohibits the special Perl block names from being used as labels.
CONFIGURATION
This Policy is not configurable except for the standard options.
SEE ALSO
The Perl Buzz article on this issue at http://perlbuzz.com/2008/05/colons-invalidate-your-begin-and-end-blocks.html
<http://perlbuzz.com/2008/05/colons-invalidate-your-begin-and-end-blocks.html>.
ACKNOWLEDGMENT
Randy Lauen for identifying the problem.
AUTHOR
Mike O'Regan
COPYRIGHT
Copyright (c) 2008-2011 Mike O'Regan. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.14.2Perl::Critic::Policy::ControlStructures::ProhibitLabelsWithSpecialBlockNames(3pm)