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
runkit_sandbox_output_handler
RUNKIT_SANDBOX_OUTPUT_HANDLER(3) 1 RUNKIT_SANDBOX_OUTPUT_HANDLER(3)runkit_sandbox_output_handler - Specify a function to capture and/or process output from a runkit sandbox
SYNOPSIS
mixed runkit_sandbox_output_handler (object $sandbox, [mixed $callback])
DESCRIPTION
Ordinarily, anything output (such as with echo(3) or print(3)) will be output as though it were printed from the parent's scope. Using
runkit_sandbox_output_handler(3) however, output generated by the sandbox (including errors), can be captured by a function outside of the
sandbox.
Note
Sandbox support (required for runkit_lint(3), runkit_lint_file(3), and the Runkit_Sandbox class) is only available as of PHP 5.1.0
or specially patched versions of PHP 5.0, and requires that thread safety be enabled. See the README file included in the runkit
package for more information.
Note
Deprecated
As of runkit version 0.5, this function is deprecated and is scheduled to be removed from the package prior to a 1.0 release. The
output handler for a given Runkit_Sandbox instance may be read/set using the array offset syntax shown on the Runkit_Sandbox class
definition page.
PARAMETERS
o $sandbox
- Object instance of Runkit_Sandbox class on which to set output handling.
o $callback
- Name of a function which expects one parameter. Output generated by $sandbox will be passed to this callback. Anything returned
by the callback will be displayed normally. If this parameter is not passed then output handling will not be changed. If a non-
truth value is passed, output handling will be disabled and will revert to direct display.
RETURN VALUES
Returns the name of the previously defined output handler callback, or FALSE if no handler was previously defined.
EXAMPLES
Example #1
Feeding output to a variable
<?php
function capture_output($str) {
$GLOBALS['sandbox_output'] .= $str;
return '';
}
$sandbox_output = '';
$php = new Runkit_Sandbox();
runkit_sandbox_output_handler($php, 'capture_output');
$php->echo("Hello
");
$php->eval('var_dump("Excuse me");');
$php->die("I lost myself.");
unset($php);
echo "Sandbox Complete
";
echo $sandbox_output;
?>
The above example will output:
Sandbox Complete
Hello
string(9) "Excuse me"
I lost myself.
PHP Documentation Group RUNKIT_SANDBOX_OUTPUT_HANDLER(3)