Is it possible to combine a regular expression with a aritmetical expression? For example, taking a 8-numbers caracter sequece and casting each output of a grep, comparing to a constant.
THX! (2 Replies)
hello all.. I'm a bit new to this site.. and I hope to learn alot.. but I've been having a hard time figuring this out. I'm horrible with regular expressions.. so any help would be greatly appreciated.
I have a file with a list of names like this: LASTNAME, FIRSTNAME, MIDDLEINITIAL
how can... (5 Replies)
Hi all,
Not sure how "for dummies" this question is, but I'd better use understatement...
A. My Environment
==============
I am using RedHat Linux, version 2.6.18-53.el5.
When I type less --version I get:
less 394
Copyright (C) 1984-2005 Mark Nudelman
...
My terminal is configured... (1 Reply)
CA_RELEASE has a value of 6. I need to check if that this is a numeric value. if not error.
source $CA_VERSION_DATA
if * ]
then
echo "CA_RELESE $CA_RELEASE is invalid"
exit -1
fi
+ source /etc/ncgl/ca_version_data
++ CA_PRODUCT_ID=samxts
++ CA_RELEASE=6
++ CA_WEEK_NO=7
++... (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)
I have put some yellow color codes and works well.
I call the funstion using
print_usage(stderr, 0);
I would like to know if there is any way, to store the ansi color codes in variables and then call them inside fprintf.
Or have a format followed by the strings I want to output.
... (5 Replies)
Hi,
I have a file containing color codes:
Fri May 25 17:13:04 2012: Starting MTA: exim4^ Loading cpufreq kernel modules...^How can I display it colorized on a linux terminal? (4 Replies)
Hello All,
I'm trying to extract the lines between two consecutive elements of an array from a file.
My array looks like:
problem_arr=(PRS111 PRS213 PRS234)
j=0
while } ]
do
k=`expr $j + 1`
sed -n "/${problem_arr}/,/${problem_arr}/p" problemid.txt
---some operation goes... (11 Replies)
HI
i have two files say test and test1
Test.txt
Code:
Lun01 2TB 1.99TB 99.6%
Lun02 2TB 1.99TB 99.5%
Lun03 2TB 1.99TB 99.5%
Lun04 2TB 1.55TB 89.6%
Code:
Test1.txt
Lun01 2TB 1.99TB 89.5%
Lun02 2TB 1.99TB 99.5%
Lun03 2TB 1.99TB 99.5%
Requirement is to compare... (6 Replies)
Discussion started by: venkitesh
6 Replies
LEARN ABOUT PLAN9
regexp
REGEXP(6) Games Manual REGEXP(6)NAME
regexp - regular expression notation
DESCRIPTION
A regular expression specifies a set of strings of characters. A member of this set of strings is said to be matched by the regular
expression. In many applications a delimiter character, commonly bounds a regular expression. In the following specification for regular
expressions the word `character' means any character (rune) but newline.
The syntax for a regular expression e0 is
e3: literal | charclass | '.' | '^' | '$' | '(' e0 ')'
e2: e3
| e2 REP
REP: '*' | '+' | '?'
e1: e2
| e1 e2
e0: e1
| e0 '|' e1
A literal is any non-metacharacter, or a metacharacter (one of .*+?[]()|^$), or the delimiter preceded by
A charclass is a nonempty string s bracketed [s] (or [^s]); it matches any character in (or not in) s. A negated character class never
matches newline. A substring a-b, with a and b in ascending order, stands for the inclusive range of characters between a and b. In s,
the metacharacters an initial and the regular expression delimiter must be preceded by a other metacharacters have no special meaning and
may appear unescaped.
A matches any character.
A matches the beginning of a line; matches the end of the line.
The REP operators match zero or more (*), one or more (+), zero or one (?), instances respectively of the preceding regular expression e2.
A concatenated regular expression, e1e2, matches a match to e1 followed by a match to e2.
An alternative regular expression, e0|e1, matches either a match to e0 or a match to e1.
A match to any part of a regular expression extends as far as possible without preventing a match to the remainder of the regular expres-
sion.
SEE ALSO awk(1), ed(1), sam(1), sed(1), regexp(2)REGEXP(6)