hi all, i have the following problem using awk in a script
i want to read the values from a column with real numbers and calculate the mean.the problem is that when i use a statement such as this
num = $4
i cant find a way to convert the variable from string to floating point to perform... (7 Replies)
hey everyone, Im making a program that prints different patterns using *
like this:
*
***
*****
*******
*****
***
*
i am letting the user decide what the number of rows can be, i want the shape to appear on the left (60 spaces from the right) if it is even and on... (5 Replies)
Hi, I've trouble getting some numbers from a html-file. The thing is that I have several html-logs that contains lines like this:
nerdnerd, how_old_r_u:45782<br>APPLY: <hour_second> Verification succeded
This is some of what I've extracted from a html file but all I really want is the number... (7 Replies)
can any one know that how can i get perfect format of phone number
my function is
phone_number=`echo $name_number | awk '{print $NF}'`
check=`echo $phone_number | egrep -c "--"`
i get the format but if i need perfect format like xxx-xxx-xxxx. if i enter not in this format it still... (1 Reply)
Hi,
I am trying to perform a simple soustraction between two floating numbers and cannot get it done for some reason due to the use of the sub command.
The following is the straight-forward result of the soustraction:
$ echo | gawk '{a=968;b=967.99;c=a-b;print c}' ... (2 Replies)
Good day to everyone!
So, let's start :)
I have a file with a numbers in some ranges
for example:
1 10
49 72
...
and this file need to transform to:
1
2
3
4 (14 Replies)
Hello everyone,
on the man page of "magic(5)"
There is explanation
"&, to specify that the value from the file must have set all of the bits that are set in the specified value" .
My question is that what is the difference between '&' and equal operator '=' ? I tested it with file... (6 Replies)
Hello,
In manpage magic(5)
"
The “B” flag compacts whitespace in the target, which must contain at least one whitespace character. If the magic has n consecutive blanks, the target needs at least n consecutive blanks to match. The “b” flag treats every blank in the target as an optional... (4 Replies)
Hi
I have a shell scribt with some numbers in exponential format, for example, "1.23456789E +01" Now I would like to bring these numbers into a format without the E. Can someone help me
Thanks
Flo
---------- Post updated at 10:07 AM ---------- Previous update was at 09:14 AM... (1 Reply)
I have tried the following commands and can't get a number to format with commas:
echo 1234567.12 |awk '{printf("%-12s %20s\n", $0, comma($0)) }'
This prints out value 50000 without a comma
for i in *13*; do (cd $i && du -sk . && echo $i);done|grep -v 0000|gawk -F OFS="," ' {SUM += $1}... (8 Replies)
Discussion started by: newbie2010
8 Replies
LEARN ABOUT DEBIAN
bytes
bytes(3perl) Perl Programmers Reference Guide bytes(3perl)NAME
bytes - Perl pragma to force byte semantics rather than character semantics
NOTICE
This pragma reflects early attempts to incorporate Unicode into perl and has since been superseded. It breaks encapsulation (i.e. it
exposes the innards of how the perl executable currently happens to store a string), and use of this module for anything other than
debugging purposes is strongly discouraged. If you feel that the functions here within might be useful for your application, this possibly
indicates a mismatch between your mental model of Perl Unicode and the current reality. In that case, you may wish to read some of the perl
Unicode documentation: perluniintro, perlunitut, perlunifaq and perlunicode.
SYNOPSIS
use bytes;
... chr(...); # or bytes::chr
... index(...); # or bytes::index
... length(...); # or bytes::length
... ord(...); # or bytes::ord
... rindex(...); # or bytes::rindex
... substr(...); # or bytes::substr
no bytes;
DESCRIPTION
The "use bytes" pragma disables character semantics for the rest of the lexical scope in which it appears. "no bytes" can be used to
reverse the effect of "use bytes" within the current lexical scope.
Perl normally assumes character semantics in the presence of character data (i.e. data that has come from a source that has been marked as
being of a particular character encoding). When "use bytes" is in effect, the encoding is temporarily ignored, and each string is treated
as a series of bytes.
As an example, when Perl sees "$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 v5.14.2 2010-12-30 bytes(3perl)