Hi I'm just learning programming and need some help.
I've taken a data file which has a list of numbers eg:
3
5
32
533
13
2
And I've used sort -n and to sort and then piped it to awk to arrange into an array.
I've gotten this far but knowing a little C I know that I'm not loading the array correctly as there should be some sort of loop. But I can't find any good tutorials to show me how to do what I want to do.
Some one plz help me how to sort an array of hashes .....
for e.g i have an array as
@AoH = (
{
ques => 10,
marks => 32,
},
{
ques => 32,
marks => 22,
},
{
ques => 2,
marks => 41,
},
);
now i want to sort this array with increasing value of "ques" ..... plz... (3 Replies)
Alright, I'm sure there's a more efficient way to do this... I'm not an expert by any means. What I'm trying to do is search a file for lines that match the two input words (first name, last name) in order to remove that line. The removal part is what I'm struggling with. Here is my code:
echo... (4 Replies)
Hello all,
I've got what I'm pretty sure is a simple problem, but I just can't seem to work past it. I'm trying to use awk to pretty up a log file, and calculate a percentage.
The log file looks like this:
# tail strtovrUsage
20090531-18:15:45 RSreq - 24, RSsuc - 24, RSrun - 78, RSerr -... (4 Replies)
I am trying to extract the file names alone, for example "TVLI_STATS_NRT_XLSTWS03_20120215_132629.csv", from below output
which was given by the grep.
sam:/data/log: grep "C10_Subscribe.000|subscribe|newfile|" PDEWG511_TVLI_JOB_STATS.ksh.201202*
Output:
... (6 Replies)
Hello,
And when you think you know the basics of something, UNIX in this case, something like what I will describe below comes along....
On a Linux system, a "typical" directory with some files. Say 20.
I do:
> ls | sort > mylisting
Now when I:
> vi mylisting
There is mylisting... (13 Replies)
Hi! all here is my code
which is working fine no errors but I want to know how to take result and input to other program
awk 'FNR==1{i++}{LC=NR}
{for(k=1; k<=NF; k++) A=$k}
END{for (i=1;i<=LC;i++)
{
for(j=1;j<=LC;j++)
if(A=='$UID' && A>='$MX'+A &&... (7 Replies)
So, this is weird... I'm running this command:
iotop -o -P -k -bt -d 5
I'd like to save the output relelvant to rsyslogd to a file, so I do this:
iotop -o -P -k -bt -d 5 | grep rsyslogd >> /var/log/rsyslogd
Nothing is written to the file! I can write the full output to the file:
... (2 Replies)
Hi there,
I'm listing files and sorting them. When I try to get length of array variable in which these files are stored I get 1 as value. That's weird.
files_info="$(find $input_dir -name "*_CHR$i.info" | sort )"
printf ${#files_info}"\n" #print length
#--loop through... (6 Replies)
Discussion started by: genome
6 Replies
LEARN ABOUT DEBIAN
plan9-join
JOIN(1) General Commands Manual JOIN(1)NAME
join - relational database operator
SYNOPSIS
join [ options ] file1 file2
DESCRIPTION
Join forms, on the standard output, a join of the two relations specified by the lines of file1 and file2. If one of the file names is the
standard input is used.
File1 and file2 must be sorted in increasing ASCII collating sequence on the fields on which they are to be joined, normally the first in
each line.
There is one line in the output for each pair of lines in file1 and file2 that have identical join fields. The output line normally con-
sists of the common field, then the rest of the line from file1, then the rest of the line from file2.
Input fields are normally separated spaces or tabs; output fields by space. In this case, multiple separators count as one, and leading
separators are discarded.
The following options are recognized, with POSIX syntax.
-a n In addition to the normal output, produce a line for each unpairable line in file n, where n is 1 or 2.
-v n Like -a, omitting output for paired lines.
-e s Replace empty output fields by string s.
-1 m
-2 m Join on the mth field of file1 or file2.
-jn m Archaic equivalent for -n m.
-ofields
Each output line comprises the designated fields. The comma-separated field designators are either 0, meaning the join field, or
have the form n.m, where n is a file number and m is a field number. Archaic usage allows separate arguments for field designators.
-tc Use character c as the only separator (tab character) on input and output. Every appearance of c in a line is significant.
EXAMPLES
sort /etc/passwd | join -t: -1 1 -a 1 -e "" - bdays
Add birthdays to the /etc/passwd file, leaving unknown birthdays empty. The layout of /adm/users is given in passwd(5); bdays con-
tains sorted lines like
tr : ' ' </etc/passwd | sort -k 3 3 >temp
join -1 3 -2 3 -o 1.1,2.1 temp temp | awk '$1 < $2'
Print all pairs of users with identical userids.
SOURCE
/src/cmd/join.c
SEE ALSO sort(1), comm(1), awk(1)BUGS
With default field separation, the collating sequence is that of sort -b -ky,y; with -t, the sequence is that of sort -tx -ky,y.
One of the files must be randomly accessible.
JOIN(1)