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LINQ Aggregate algorithm explained
.../Output 1200000 ((((5*10)*20)*30)*40)
Much like the above examples, this starts with a value of 5 and multiplies it by the first element of the sequence 10 giving a result of 50. This result is carried forward and multiplied by the next number in the sequence 20 to give a result of 1000. This cont...
PHP + MySQL transactions examples
...
I think I have figured it out, is it right?:
mysql_query("START TRANSACTION");
$a1 = mysql_query("INSERT INTO rarara (l_id) VALUES('1')");
$a2 = mysql_query("INSERT INTO rarara (l_id) VALUES('2')");
if ($a1 and $a2) {
mysql_query("COMMIT");
} else {
mysql_query("RO...
Tomcat startup logs - SEVERE: Error filterStart how to get a stack trace?
When I start Tomcat I get the following error:
16 Answers
16
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What's the opposite of head? I want all but the first N lines of a file
...ad of the last 10;
or use -n +K to output lines starting with the Kth
So to filter out the first 2 lines, -n +3 should give you the output you are looking for (start from 3rd).
share
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XAMPP, Apache - Error: Apache shutdown unexpectedly
I've just re-installed XAMPP, and when I try to start my Apache server in the XAMPP Control Panel, I now get the following errors:
...
What is the purpose of Flask's context stacks?
... can retrieve with the module's get_ident() function. That function is the starting point to the magic behind having request, current_app,url_for, g, and other such context-bound global objects.
try:
from greenlet import get_ident
except ImportError:
from thread import get_ident
Now that we...
What LaTeX Editor do you suggest for Linux? [closed]
... Gummi is good but has still many shortcomings. For example when you start it up it opens up a default latex document which is truly annoying.
– Jubei
Aug 25 '13 at 6:24
...
Genymotion, “Unable to load VirtualBox engine.” on Mavericks. VBox is setup correctly
...ame problem and solved it by running the following command:
sudo /Library/StartupItems/VirtualBox/VirtualBox restart
In later versions, the command is
sudo /Library/Application\ Support/VirtualBox/LaunchDaemons/VirtualBoxStartup.sh restart
Make sure you've unblocked VirtualBox's kernel extens...
How do you add an in-app purchase to an iOS application?
...ifier]];
productsRequest.delegate = self;
[productsRequest start];
}
else{
NSLog(@"User cannot make payments due to parental controls");
//this is called the user cannot make payments, most likely due to parental controls
}
}
- (void)productsRequest:...
tomcat - CATALINA_BASE and CATALINA_HOME variables
...se they are used to find that file.
For example:
(4.1) Tomcat can be started by executing one of the following
commands:
%CATALINA_HOME%\bin\startup.bat (Windows)
$CATALINA_HOME/bin/startup.sh (Unix)
or
%CATALINA_HOME%\bin\catalina.bat start (Windows)
$CA...