Hey everyone ...
I wanted to process the contents of a file, as in modify its contents. whats the best way to do it on perl? In more detail I hav to go through the contents of the file, match patterns n then modify the contents of the same file depending on the matching results. Any help is... (2 Replies)
I need a script to process a huge single line text file:
The sample of the text is:
"forward_inline_item": "Inline", "options_region_Australia": "Australia", "server_event_err_msg": "There was an error attempting to save", "Token": "Yes", "family": "Family","pwd_login_tab": "Enter Your... (1 Reply)
I am new to perl, and need a script to pull a CSV file, strip out 2 leading columns, and 2 ending columns, and resave the file in a new location. The file is basic and has less than 10,000 records. Secondly, can I schedule perl scripts to run daily? Can someone provide the basic script to... (1 Reply)
Qspace ABC
Queue doCol: true
Queue order: fifo
Queue setCol: red
Queue order: fifo
Qspace XYZ
Queue getCol: true
Queue order: fifo
I need to append every line in this file with Qspace & Queue, so that final o/p shall look like this,
Qspace: ABC Queue: doCol
Qspace: ABC Queue: doCol... (2 Replies)
Hi everyone,
I have Xml files in a folder, I need to extract some attribute values form xml files and store in a hash. My xml file look like this.
<?xml version="1.0" encoding="UTF-8"?>
<Servicelist xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"... (0 Replies)
Dear all,
I got a perl script to write some data into an excel file using Spreadsheet::ParseExcel::SaveParser. After that I find all formulas in the excel file are gone.
Does any body encounter this problem or have any work around? (2 Replies)
I have following result.log file (always has 2 lines) which I need to process,
cat result.log
name.cmd.method,"result","abc","xyz";
name="hello,mine.12345,"&"tree"&" xyz "&" tree "&" xyz",
data="way,"&" 1"&"rate-me"&"1"&"rate-me",str="",ret="";
now I need to extract the strings/data as... (4 Replies)
Hello,
I extracted a list of files in a directory with the command ls . However this is not my computer, so the ls functionality has been revamped so that it gives the filesizes in front like this :
This is the output of ls command : I stored the output in a file filelist
1.1M... (5 Replies)
Discussion started by: ajayram
5 Replies
LEARN ABOUT CENTOS
bytes
bytes(3pm) Perl Programmers Reference Guide bytes(3pm)NAME
bytes - Perl pragma to force byte semantics rather than character semantics
NOTICE
This pragma reflects early attempts to incorporate Unicode into perl and has since been superseded. It breaks encapsulation (i.e. it
exposes the innards of how the perl executable currently happens to store a string), and use of this module for anything other than
debugging purposes is strongly discouraged. If you feel that the functions here within might be useful for your application, this possibly
indicates a mismatch between your mental model of Perl Unicode and the current reality. In that case, you may wish to read some of the perl
Unicode documentation: perluniintro, perlunitut, perlunifaq and perlunicode.
SYNOPSIS
use bytes;
... chr(...); # or bytes::chr
... index(...); # or bytes::index
... length(...); # or bytes::length
... ord(...); # or bytes::ord
... rindex(...); # or bytes::rindex
... substr(...); # or bytes::substr
no bytes;
DESCRIPTION
The "use bytes" pragma disables character semantics for the rest of the lexical scope in which it appears. "no bytes" can be used to
reverse the effect of "use bytes" within the current lexical scope.
Perl normally assumes character semantics in the presence of character data (i.e. data that has come from a source that has been marked as
being of a particular character encoding). When "use bytes" is in effect, the encoding is temporarily ignored, and each string is treated
as a series of bytes.
As an example, when Perl sees "$x = chr(400)", it encodes the character in UTF-8 and stores it in $x. Then it is marked as character data,
so, for instance, "length $x" returns 1. However, in the scope of the "bytes" pragma, $x is treated as a series of bytes - the bytes that
make up the UTF8 encoding - and "length $x" returns 2:
$x = chr(400);
print "Length is ", length $x, "
"; # "Length is 1"
printf "Contents are %vd
", $x; # "Contents are 400"
{
use bytes; # or "require bytes; bytes::length()"
print "Length is ", length $x, "
"; # "Length is 2"
printf "Contents are %vd
", $x; # "Contents are 198.144"
}
chr(), ord(), substr(), index() and rindex() behave similarly.
For more on the implications and differences between character semantics and byte semantics, see perluniintro and perlunicode.
LIMITATIONS
bytes::substr() does not work as an lvalue().
SEE ALSO
perluniintro, perlunicode, utf8
perl v5.16.3 2013-02-26 bytes(3pm)