Hi all, I'm a newbie to the Linux world and I got a couple of shell script questions:
(1) How do combine two variables and make it equal to a third variable? For example, I got a variable $A=FirstName, $B=LastName, and I want to combine the variable into one variable so when you echo the final... (4 Replies)
Hello all,
I am working on a basic script but need a little help.
Issue:
I am running a SQL Query using sqlplus and a shell script. I have the output of the statement stored as variable $A. $A is set to "other text here 45678754 other text here". I need to strip all text except that numeric... (13 Replies)
I am running a script where one of the variables (the month and year) is input at the command line. What I would like to do is chop off the last few characters of that string to create a new variable, while maintaining the old one.
The script is run like this:
./pull_station_v4.csh KYWST... (3 Replies)
Hi all,
Does anyone know how to code in ksh that will remove the first character in a string variable and replace that variable without the first character?
Example:
var1=ktest1 will become var1=test1
var2=rtest2 will become var2=test2
Need help please. (10 Replies)
I am getting a value from a csv file using CUT command, however the command extracting the records with trailing spaces. I am using the result into a sql session to fetch data, because of the trailing spaces the sql session is unable to fetch any data.
Please let me know, how to remove this... (2 Replies)
I have a variable
I want to remove the spaces in between.
The output should be
How can this be done
Any help will be appreciated. Thanks in advance (1 Reply)
I have following codes:
~$ var_1="ABC"
~$ echo $var_1 | wc -m
4
~$ echo -n $var_1 | wc -m
3
~$ var_2=`echo -n $var_1`
~$ echo $var_2
ABC
~$ echo $var_2 | wc -m
4
~$
I would suppose the last command ~$ echo $var_2 | wc -m would give 3; but apparently, var_2 still has the new line... (5 Replies)
Dear All,
i have filename RYK3201_032001002.pdf
and i am using below command to get a file
file_name1=$(echo $file_name | cut -d "_" -f2 | cut -d "." -f1 | cut -c -6)
and then
file_name2=${NewFile_NAME}_$file_name1
now the value of file_name1 will be 032001
i want to file_name1... (5 Replies)
I have a file ABC.DAT with 2 columns avaialble
Data format :
XYZ!$#$!120
XXZ!$#$!1000
YYZ!$#$!104
While running the following code :
FILE_COUNTER=1;
RECORD_CN_FILE_COUNT=$((`wc -l ABC.DAT| cut -f1 -d' '`));
while
do
FILE_NAME=`cat ABC.DAT.DAT| head -$FILE_COUNTER |tail -1 | awk -F... (1 Reply)
I a have a delimited file that has a 2 column which I need to read and pull out both columns from the file.Now the while pulling out the second column and storing in a variable I get a \r\n charachter embedded in the output when an od -c is run.How can I remove the \r\n columns from the file.
... (3 Replies)
Discussion started by: Nikhil Gautam
3 Replies
LEARN ABOUT OSX
bytes
bytes(3pm) Perl Programmers Reference Guide bytes(3pm)NAME
bytes - Perl pragma to force byte semantics rather than character semantics
NOTICE
This pragma reflects early attempts to incorporate Unicode into perl and has since been superseded. It breaks encapsulation (i.e. it
exposes the innards of how the perl executable currently happens to store a string), and use of this module for anything other than
debugging purposes is strongly discouraged. If you feel that the functions here within might be useful for your application, this possibly
indicates a mismatch between your mental model of Perl Unicode and the current reality. In that case, you may wish to read some of the perl
Unicode documentation: perluniintro, perlunitut, perlunifaq and perlunicode.
SYNOPSIS
use bytes;
... chr(...); # or bytes::chr
... index(...); # or bytes::index
... length(...); # or bytes::length
... ord(...); # or bytes::ord
... rindex(...); # or bytes::rindex
... substr(...); # or bytes::substr
no bytes;
DESCRIPTION
The "use bytes" pragma disables character semantics for the rest of the lexical scope in which it appears. "no bytes" can be used to
reverse the effect of "use bytes" within the current lexical scope.
Perl normally assumes character semantics in the presence of character data (i.e. data that has come from a source that has been marked as
being of a particular character encoding). When "use bytes" is in effect, the encoding is temporarily ignored, and each string is treated
as a series of bytes.
As an example, when Perl sees "$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 v5.16.2 2012-08-26 bytes(3pm)