i have following query
e.g i want the VI Editor cursor at line number N instead of 0 while opening the file from unix prompt.
vi filename ??????
Can anyone help? (4 Replies)
Dear community,
I'm quite a newbie with scripting, I have this problem:
I have a file with many lines and I want to copy the lines from 1 to N to file.1, from N+1 to 2N to file.2, and so on up to the end of the file
I have tried with something like this (N=43 in this example):
awk '{for... (2 Replies)
Hello all
i know it is pretty hard one but you will manage it all
after noticing and calculating i find a rhythm for the file i want to edit
to copy the last 12 characters in line but the problem is to add after first 25 characters in same line
in other way too copy the last 12 characters... (10 Replies)
I generally use yy to copy a line and then p to paste the line at end of current line.
But is there a way to paste the copied line in concatenation with the current line with out going to next line. (3 Replies)
Hi,
For a particular file i used Vi editor to view the content and i have to copy the same ,
But in the files if have 1000 lines and i have to copy the file contents from 700th to 900th lines
But while copying i'm dragging the mouse from top to bottom but i supposed to copy the lines... (8 Replies)
Hi All,
I need to copy a specific line from a file to another file.
lets suppose the line number 13 of a file
when I am writing the line number explicitly.. its working fine
sed -n '13p' afile > anotherfile
but, when inside a script, i am getting the line number value inside a variable... (4 Replies)
Hello,
I would like to copy the first and third char on each line of a file and place them in the 14h and 17th char positions. The file name is listed first and is 6 char's and the dir name is second and also same char size on each line.
The file has thousands of lines.
Initial... (6 Replies)
My file is 13 mb but it has big long lines.
i tried in vain vi -R filename
I tried in vainbash: vim: command not found
SunOS mymac 5.10 Generic_150400-26 sun4v sparc sun4vCan you please suggest? (1 Reply)
Discussion started by: mohtashims
1 Replies
LEARN ABOUT DEBIAN
file::mimeinfo::cookbook
File::MimeInfo::Cookbook(3pm) User Contributed Perl Documentation File::MimeInfo::Cookbook(3pm)NAME
File::MimeInfo::Cookbook - various code snippets
DESCRIPTION
Some code snippets for non-basic uses of the File::MimeInfo module:
Matching an extension
A file does not have to actually exist in order to get a mimetype for it. This means that the following will work:
my $extension = '*.txt';
my $mimetype = mimetype( $extension );
Mimetyping an scalar
If you want to find the mimetype of a scalar value you need magic mimetyping; after all a scalar doesn't have a filename or inode.
What you need to do is to use IO::Scalar :
use File::MimeInfo::Magic;
use IO::Scalar;
my $io_scalar = new IO::Scalar $data;
my $mimetype = mimetype( $io_scalar );
In fact most other "IO::" will work as long as they support the "seek()" and "read()" methods. Of course if you want really obscure
things to happen you can always write your own IO object and feed it in there.
Be aware that when using a filehandle like this you need to set the ":utf8" binmode yourself if apropriate.
Mimetyping a filehandle
Regrettably for non-seekable filehandles like STDIN simply using an "IO::" object will not work. You will need to buffer enough of the
data for a proper mimetyping. For example you could mimetype data from STDIN like this:
use File::MimeInfo::Magic;
use IO::Scalar;
my $data;
read(STDIN, $data, $File::MimeInfo::Magic::max_buffer);
my $io_scalar = new IO::Scalar $data;
my $mimetype = mimetype( $io_scalar );
Be aware that when using a filehandle like this you need to set the ":utf8" binmode yourself if apropriate.
Creating a new filename
Say you have a temporary file that you want to save with a more proper filename.
use File::MimeInfo::Magic qw#mimetype extensions#;
use File::Copy;
my $tmpfile = '/tmp/foo';
my $mimetype = mimetype($tmpfile);
my $extension = extensions($mimetype);
my $newfile = 'untitled1';
$newfile .= '.'.$extension if length $extension;
move($tmpfile, $newfile);
Force the use of a certain database directory
Normally you just need to add the dir where your mime database lives to either the XDG_DATA_HOME or XDG_DATA_DIRS environment variables
for it to be found. But in some rare cases you may want to by-pass this system all together. Try one of the following:
@File::MimeInfo::DIRS = ('/home/me/share/mime');
eval 'use File::MimeInfo';
die if $@;
or:
use File::MimeInfo;
@File::MimeInfo::DIRS = ('/home/me/share/mime');
File::MimeInfo->rehash();
This can also be used for switching between databases at run time while leaving other XDG configuration stuff alone.
AUTHOR
Jaap Karssenberg <pardus@cpan.org>
Copyright (c) 2005, 2012 Jaap G Karssenberg. All rights reserved. This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
SEE ALSO
File::MimeInfo
perl v5.14.2 2012-01-05 File::MimeInfo::Cookbook(3pm)