I have a log file that for some reason, once or two time a month, line foods are missing.
This log is generated from vmstat everyminute. I dont know why sometimes it does this.
Each line in the log should have 18 columns separated by one or more spaces.
Good Log: (not actual log)
1 1... (8 Replies)
I have a list of id;
for example: file 1
dfghd
dfghe
dfgey
dfgeu
I have another data file that contain this ids as headers;
for ex. file2
>dfghd
gfdgfddl;klfkld;ld;lgl;dld'l'dv
>dfghe
gkwhjhsgdjdjdjhjddj
>dfgey
jdkjfhdjhfdkjhfdkhkdk
I wanted to compare file 1 and file 2... (1 Reply)
Hi,
I have a text file with the following content:
monday,20
tuesday,10
wednesday,29
monday,10
friday,12
wednesday,14
monday,15
thursday,34
i want the following output:
monday,45
tuesday,10
wednesday,43
friday,12 (3 Replies)
Thanks Bartus11 for your help in the following code to compare the two files "t1" and "t2".
awk 'NR==FNR{a=1;next}$2 in a{print $2}' t1 t2
First can anyone explain that what is the purpose of assigning a =1?
Second, the current script is printing out the matched columns between the... (4 Replies)
Hi,
I'm running a DB query which returns names of people and writes it in a text file as shown below:
Carey, Jim; Cena, John
Cena, John
Sen, Tim; Burt, Terrence
Lock, Jessey; Carey, Jim
Norris, Chuck; Lee, Bruce
Rock, Dwayne; Lee, Bruce
I want to use awk and get all the names... (9 Replies)
Hi all.
This is my first post on this forum. I've previously found great help in the huge knowledgebase that is here, but this time I have not been able to find a solution to my problem.
I have a large text file that looks like this:
typedef struct ABC_struct_nbr1_ {
char attr1; /*... (0 Replies)
so my output is this:
session_closed=157
session_opened=151
session_closed=18
session_opened=17
there are two patterns here, but with different values. the two patterns are "session_opened" and "session_closed". i expect there will be many more other patterns.
what i want to do is... (8 Replies)
I need to vlookup and check the server not found.
Source file 1
server1
server2
server3
server4
server5_root
server6_silver
server7
server7-test
server7-temp
Source file 2
server1_bronze (6 Replies)
Discussion started by: ranjancom2000
6 Replies
LEARN ABOUT MOJAVE
bytes5.18
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This pragma reflects early attempts to incorporate Unicode into perl and has since been superseded.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)