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MySQL “NOT IN” query
...s not seem to depend on data distribution, number of values in both tables etc., as long as both fields are indexed. Since there are three pieces of code in MySQL that essentialy do one job, it is possible that the code responsible for EXISTS makes some kind of an extra check which takes extra time....
HTML5 Local storage vs. Session storage
...y to the current window, are there any benefits (performance, data access, etc) to Session Storage over Local Storage?
10 A...
package R does not exist
...to-generated from your XML files (UI layout, internationalization strings, etc.) If the code used to be working before (as it seems it is), you need to tell your IDE to regenerate these files somehow:
in IntelliJ, select Tools > Android > Generate sources for <project>
(If you know the...
What is middleware exactly?
...d on different platforms using different languages (like C++, Java, Cobol, etc.).
So here comes middleware software in picture which provides services like
transformation of messages formats from one app to other,
routing and enriching messages besides taking care of security,
encryption,
val...
Sum a list of numbers in Python
... So you want (element 0 + element 1) / 2, (element 1 + element 2) / 2, ... etc.
We make two lists: one of every element except the first, and one of every element except the last. Then the averages we want are the averages of each pair taken from the two lists. We use zip to take pairs from two lis...
How to truncate a foreign key constrained table?
...L's TRUNCATE being incomplete - truncate isn't supposed to invoke triggers etc. If it did, it would just be the same as DELETE! It's row-agnostic, hence it's unable to perform row-related operations (like invoking triggers or examining foreign keys). It works in the same way in Oracle and Sql Server...
Creating an instance using the class name and calling constructor
...?> clazz = Class.forName(className);
Constructor<?> ctor = clazz.getConstructor(String.class);
Object object = ctor.newInstance(new Object[] { ctorArgument });
That will only work for a single string parameter of course, but you can modify it pretty easily.
Note that the class name has t...
Center content in responsive bootstrap navbar
...mobile display -->
<div class="navbar-header">
...etc
to center the nav, that what i've done:
<div class="container-fluid" id="nav_center">
css:
@media (min-width:768px) { /* don't break navbar on small screen */
#nav_center {
width: 700px /* need to ...
Access denied for user 'test'@'localhost' (using password: YES) except root user
...If you are connecting to the MySQL using remote machine(Example workbench) etc., use following steps to eliminate this error on OS where MySQL is installed
mysql -u root -p
CREATE USER '<<username>>'@'%%' IDENTIFIED BY '<<password>>';
GRANT ALL PRIVILEGES ON * . * TO '<&...
Favorite Visual Studio keyboard shortcuts [closed]
... Ctrl K, D formats the entire document (proper indents, ws cleaned up, etc.) in mine. ?
– John Dunagan
Oct 21 '08 at 20:40
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