Try to avoid regex's if you can, to improve efficiency. Also, if you happen to know, to a reasonable extent, the frequency of occurrence of those strings, you could use simple string comparisons (with the proper order of comparisons) with the short-circuit logical OR (||) operator.
Last edited by elixir_sinari; 03-24-2013 at 01:13 PM..
This User Gave Thanks to elixir_sinari For This Post:
I have a varable(var1) in a AWK script that contain data in the following format
-
I need to extract timestamp,priority and log message.I can extract these by using split function but i don't want to use it, since i want to extract it in one go. I have some difficulties in doing it using... (3 Replies)
Ive got a file with words and also numbers.
Bla BLA
10 10
11 29
12 89
13 35
And i need to change "10,29,89,25" and also remove anything that contains actually words... (4 Replies)
I can print a line with an expression using this:
awk '/regex/'
I can print the line immediately before an expression using this:
awk '/regex/{print x};{x=$0}'
How do I print the line immediately before and then the line with the expression? (2 Replies)
Hello Experts,
Please help me to cope with the following problem
I ve patterens like
Input
Noptx(5) // remain the same
-*Nop(3);
Nop(9);
--Nop(8); // remain the same d3
**---Nop(7); //remain the same d3
**---Nop(7);
*--Nop(6);
--**Nop(5);
-Nop(4);
Nop(3);
- represents a space... (2 Replies)
Hi,
I have a string like this-->"After Executing service For 10 Request"
in this string i need to extract "10".
the contents of the string is variable and "10" appears before "For" and after "Request" i.e, in this format "For x Request"
I need to extract the value of x. How to do this in AWK?... (10 Replies)
I have a file "fwcsales_filenames.txt" which has a list of file names that are supposed to be copied to another directory. In addition to that, I am trying to extract the date part and write to the log.
I am getting the regular expression error when trying to strip the date part using the "ll"... (1 Reply)
Hello world,
I was wondering if there is a nicer way to write the following code (in AWK):
awk '
FNR==NR&&$1~/^m$/{tok1=1}
FNR==NR&&$1~/^m10$/{tok1=1}
' my_file
In fact, it looks for m2, m4, m6, m8 and m10 and then return a positive flag. The problem is how to define 10 thanks... (3 Replies)
Hi all,
How am I read a file, find the match regular expression and overwrite to the same files.
open DESTINATION_FILE, "<tmptravl.dat" or die "tmptravl.dat";
open NEW_DESTINATION_FILE, ">new_tmptravl.dat" or die "new_tmptravl.dat";
while (<DESTINATION_FILE>)
{
# print... (1 Reply)
Hi,
I have a file with two fields in it as shown below
14,30
28,30
16,30
22,30
21,30
3,30
Fields are separated by comma ",".
I've been trying to validate the file based on the condition "each field must be a numeric value"
I am using HP-UX OS.
I have tried the following awk... (4 Replies)
Hi All,
I would like to search a regular expression by passing as an i/p variableto AWK.
For Example ::
162.111.101.209.9516
162.111.101.209.41891
162.111.101.209.9516
162.111.101.209.9517
162.111.101.209.41918
162.111.101.209.9517
162.111.101.209.41937
162.111.101.209.41951... (7 Replies)
Discussion started by: Girish19
7 Replies
LEARN ABOUT V7
sort
SORT(1) General Commands Manual SORT(1)NAME
sort - sort or merge files
SYNOPSIS
sort [ -_________x ] [ +pos1 [ -pos2 ] ] ... [ -o name ] [ -T directory ] [ name ] ...
DESCRIPTION
Sort sorts lines of all the named files together and writes the result on the standard output. The name `-' means the standard input. If
no input files are named, the standard input is sorted.
The default sort key is an entire line. Default ordering is lexicographic by bytes in machine collating sequence. The ordering is
affected globally by the following options, one or more of which may appear.
b Ignore leading blanks (spaces and tabs) in field comparisons.
d `Dictionary' order: only letters, digits and blanks are significant in comparisons.
f Fold upper case letters onto lower case.
i Ignore characters outside the ASCII range 040-0176 in nonnumeric comparisons.
n An initial numeric string, consisting of optional blanks, optional minus sign, and zero or more digits with optional decimal point, is
sorted by arithmetic value. Option n implies option b.
r Reverse the sense of comparisons.
tx `Tab character' separating fields is x.
The notation +pos1 -pos2 restricts a sort key to a field beginning at pos1 and ending just before pos2. Pos1 and pos2 each have the form
m.n, optionally followed by one or more of the flags bdfinr, where m tells a number of fields to skip from the beginning of the line and n
tells a number of characters to skip further. If any flags are present they override all the global ordering options for this key. If the
b option is in effect n is counted from the first nonblank in the field; b is attached independently to pos2. A missing .n means .0; a
missing -pos2 means the end of the line. Under the -tx option, fields are strings separated by x; otherwise fields are nonempty nonblank
strings separated by blanks.
When there are multiple sort keys, later keys are compared only after all earlier keys compare equal. Lines that otherwise compare equal
are ordered with all bytes significant.
These option arguments are also understood:
c Check that the input file is sorted according to the ordering rules; give no output unless the file is out of sort.
m Merge only, the input files are already sorted.
o The next argument is the name of an output file to use instead of the standard output. This file may be the same as one of the
inputs.
T The next argument is the name of a directory in which temporary files should be made.
u Suppress all but one in each set of equal lines. Ignored bytes and bytes outside keys do not participate in this comparison.
Examples. Print in alphabetical order all the unique spellings in a list of words. Capitalized words differ from uncapitalized.
sort -u +0f +0 list
Print the password file (passwd(5)) sorted by user id number (the 3rd colon-separated field).
sort -t: +2n /etc/passwd
Print the first instance of each month in an already sorted file of (month day) entries. The options -um with just one input file make the
choice of a unique representative from a set of equal lines predictable.
sort -um +0 -1 dates
FILES
/usr/tmp/stm*, /tmp/*: first and second tries for temporary files
SEE ALSO uniq(1), comm(1), rev(1), join(1)DIAGNOSTICS
Comments and exits with nonzero status for various trouble conditions and for disorder discovered under option -c.
BUGS
Very long lines are silently truncated.
SORT(1)