I am using Unix as my OS on my server and would like to format my hard drive. How do I go about wiping my hard drive or is there a removal tool that I can use? (1 Reply)
Hi All,
(And first up, a Happy New Year to you all! 363 days to go!)
I need to make sure that our old Sun Sparcstations and Servers are clear of any Confidential data before I return them...
Suggestions?
I'm formatting the discs to make sure that there's nothing obvious, but would... (5 Replies)
Hi All,
I have a problem with the sort and duplicate filter command I am using in one of my scripts. I have a '|' delimited file and want to sort and remove duplicates on the 1,2,15 fields. These fields constitute the primary key of the table I will be loading the data into. But I see that some... (4 Replies)
I have a file which consists of 1000 entries. Out of 1000 entries i have 500 Duplicate Entires. I want to remove the first Duplicate Entry (i,e entire Line) in the File.
The example of the File is shown below:
8244100010143276|MARISOL CARO||MORALES|HSD768|CARR 430 KM 1.7 ... (1 Reply)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
remove all files and only files that the first three characters start with numerals.
2. Relevant commands,... (6 Replies)
I have a multi-line string I'm trying to do some clean-up on.
Example:
1|575|67866|"fgnhdgj"|"afhgajh
agfajgf
ahfjhgfk
ahfkhf"|568
2|56|5435|"mayank"|"gupta
gdja
agdjagf"|677
3|5666|5435|"mayank"|"gupta
gdja
agdjagf"|677
I need a shell script that replace all \n under " ". (11 Replies)
Hi,
In a file, I have to mark duplicate records as 'D' and the latest record alone as 'C'.
In the below file, I have to identify if duplicate records are there or not based on Man_ID, Man_DT, Ship_ID and I have to mark the record with latest Ship_DT as "C" and other as "D" (I have to create... (7 Replies)
I'm looking to remove duplicate rows from a CSV file with a twist.
The first row is a header.
There are 31 columns. I want to remove duplicates when the first 29 rows are identical ignoring row 30 and 31 BUT the duplicate that is kept should have the shortest total character length in rows 30... (6 Replies)
first off i want to thank you for such a great site, you helped me narrow down a long search on what was wrong with my forum, i have a large forum motorbicycling DOT com which i had someone remove vbseo before they went under because of all the security problems. anyway i have lots of 404 errors... (13 Replies)
I have a script that builds a database ~30 million lines, ~3.7 GB .cvs file. After multiple optimzations It takes about 62 min to bring in and parse all the files and used to take 10 min to remove duplicates until I was requested to add another column. I am using the highly optimized awk code:
awk... (34 Replies)
Discussion started by: Michael Stora
34 Replies
LEARN ABOUT MOJAVE
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 v5.18.2 2013-11-04 bytes(3pm)