Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
How can I comment out a large block of Perl code?
Answer:
Perl does not support multi-line comments like C++ or Java. If you want to comment out a large block of Perl code, there is still a trick.
package Foo;
=pod
This is a multi-line comments
more...
more...
=cut
print "Hello";How do I convert a number to a string in Python?
Answer:
To convert a number to a string in Python, try the str() function.
foo = str( 999 );
print foo + ' is a string';
Result is :
999 is a string
How do I find the current module name in Python?
Answer:
The easiest way is to look at the look at the predefined global variable __main__. If it has the value "__main__", it means the program is run as a script (not as imported module).
E.g.
def main():
print 'Running test...'
if __name__ == '__main__':
main()
How to change the nginx log format?
Answer:
Firstly, you need to define a valid log format for nginx, e.g.
log_format foo '$remote_addr - $remote_user [$time_local] '
'"$request" $status $bytes_sent '
'"$http_referer" "$http_user_agent"';
Then, you need to link that format with your log file:
access_log /var/logs/nginx-test-access.log foo;
What is the PHP's short_open_tag
Answer:
PHP's short_open_tag is a way to use PHP in a PHP script without the normal PHP tag, e.g.
Instead of
# <?php echo "hello world"; ?>
You can use a simplified version.
# <? echo "hello world"; ?>
Although it is not recommended, if you want to set it, you can enable it by editing the php.ini
vi /etc/php.ini
Locate and set
short_open_tag = On
Also, remember to restart web server such as Apache if needed.
