POSIX regular expressions (BRE/ERE) and the GNU and BSD derivatives are the exception, rather than the norm, in that \ is not special/meta within a character class (bracket) expression.
In (I think all) other regex flavours \ is special in a character class (bracket) expression.
--
Shortcuts like \s are not part of POSIX BRE/ERE, but are supported as an extension in BSD and GNU implementations.
Last edited by Scrutinizer; 01-02-2020 at 10:04 AM..
can anyone tell me why this doesn't work? I've been trying to play with character classes and I seem to be missing something here..!
echo "./comparecdna.summary" | awk '/^compare+]summary$/' # returns nothing
echo "./compare_cdna.summary" | awk '/^compare_+]summary$/' # returns nothing
echo... (5 Replies)
So, I need to find the instances of a certain font and remove it....so far in my testing I am using the find command with regex to find a font I want to pull out. However, I seem to be slightly stuck, and I am sure the beard stroking Unix geniuses here can help me.
My example code:
find... (7 Replies)
Hi,
I find it really strange while writing a simple regex to match and print the matched string,
dibyajyo@fwtest:~ #perl -e '$x = "root@rashmi>"; print "matched string:$1\n" if ($x =~ /(root@rashmi)/);'
matched string:root
dibyajyo@fwtest:~ #perl -e '$x = "root@rashmi>"; print... (1 Reply)
I am having issues escaping special characters in my AWK script as follows:
for id in `cat file`
do
grep $id in file2 | awk '\
BEGIN {var=""} \
{ if ( /stringwith+'|'+'50'chars/ ) {
echo "do this"
} else if ( /anotherString/ ) {
echo "do that"
} else {
... (4 Replies)
Hi all!
I am trying to register a device in an existing device class, but I am
having trouble getting the pointer to an existing class.
I can create a class in a module, get the pointer to it and then use
it to register the device with:
*cl = class_create(THIS_MODULE, className);... (0 Replies)
Hi,
I have following regex condition, however it does not work with different logs having same visible string.I believe it is because of some difference with space character, is it possible to make it work everywhere.
Can someone suggest a better string?
/BIND dn=" uid=/
Thanks. (8 Replies)
I have the two class definition as follows.
class A { public: int a; };
class B : virtual public A{ };
The size of class A is shown as 4, and size of class B is shown as 16. Why is this effect ?. (2 Replies)
Hello,
I want to check whether string has only numeric characters. The following code doesn't work for me
#!/usr/local/bin/bash
if ]]; then
echo "true"
else
echo "False"
fi
# ./yyy '346'
False
# ./yyy 'aaa'
False
I'm searching for solution using character classes, not regex.... (5 Replies)
Hello All,
I am a learner in C++. I was testing my inheritance knowledge with following piece of code.
#include <iostream>
using namespace std;
class base
{
public :
void display()
{
cout << "In base display()" << endl;
}
void display(int k)
{... (2 Replies)
Discussion started by: anand.shah
2 Replies
LEARN ABOUT PHP
eregi
EREGI(3) 1 EREGI(3)eregi - Case insensitive regular expression matchSYNOPSIS
int eregi (string $pattern, string $string, [array &$regs])
DESCRIPTION
This function is identical to ereg(3) except that it ignores case distinction when matching alphabetic characters.
Warning
This function has been DEPRECATED as of PHP 5.3.0. Relying on this feature is highly discouraged.
PARAMETERS
o $pattern
- Case insensitive regular expression.
o $string
- The input string.
o $regs
- If matches are found for parenthesized substrings of $pattern and the function is called with the third argument $regs, the
matches will be stored in the elements of the array $regs. $regs[1] will contain the substring which starts at the first left
parenthesis; $regs[2] will contain the substring starting at the second, and so on. $regs[0] will contain a copy of the complete
string matched.
RETURN VALUES
Returns the length of the matched string if a match for $pattern was found in $string, or FALSE if no matches were found or an error
occurred.
If the optional parameter $regs was not passed or the length of the matched string is 0, this function returns 1.
EXAMPLES
Example #1
eregi(3) example
<?php
$string = 'XYZ';
if (eregi('z', $string)) {
echo "'$string' contains a 'z' or 'Z'!";
}
?>
NOTES
Note
As of PHP 5.3.0, the regex extension is deprecated in favor of the PCRE extension. Calling this function will issue an E_DEPRECATED
notice. See the list of differences for help on converting to PCRE.
Tip
eregi(3) is deprecated as of PHP 5.3.0. preg_match(3) with the i ( PCRE_CASELESS) modifier is the suggested alternative.
SEE ALSO ereg(3), ereg_replace(3), eregi_replace(3), preg_match(3), stripos(3), stristr(3), quotemeta(3).
PHP Documentation Group EREGI(3)