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How to set Oracle's Java as the default Java in Ubuntu?
...TM) Server VM (build 25.5-b02, mixed mode)
also note that you might need root permission or be in sudoers group to be able to do this. I've tested this solution on both ubuntu 12.04 and Debian wheezy and it works in both of them.
...
How do I specify different Layouts in the ASP.NET MVC 3 razor ViewStart file?
...par controller, to do this we can write our code in _ViewStart file in the root directory of the Views folder. Following is an example shows how it can be done.
@{
var controller = HttpContext.Current.Request.RequestContext.RouteData.Values["Controller"].ToString();
string cLayout = "";
...
What's the difference between an inverted index and a plain old index?
... of procedures which have been done in order to speed up application (e.g. MySQL or other RDBMS Consult MySQL the docs). Indexing can also be related to caching etc.
Inverted index creates file with structure that is primarily intender for (fulltext) searching.
Inverted index consists of two main...
Why is SELECT * considered harmful?
...tage of using * is that in some situations it can take better advantage of MySQL's cache systems. If you're running large numbers of similar select queries that request different column names (select A where X,select B where X,...) using a select * where X will allow the cache to handle a larger num...
How to print an exception in Python?
...eption:
logging.exception("An exception was thrown!")
Output:
ERROR:root:An exception was thrown!
Traceback (most recent call last):
File ".../Desktop/test.py", line 4, in <module>
1/0
ZeroDivisionError: division by zero
Notes:
the function logging.exception() should only be ...
AWS ssh access 'Permission denied (publickey)' issue [closed]
...ec2-user instead of ubuntu.
Most EC2 Linux images I've used only have the root user created by default.
See also: http://www.youtube.com/watch?v=WBro0TEAd7g
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Creating a singleton in Python
...r the task.
Here is a quote from http://googletesting.blogspot.com/2008/08/root-cause-of-singletons.html:
Now, there is one kind of Singleton which is OK. That is a singleton where all of the reachable objects are immutable. If all objects are immutable than Singleton has no global state, as everyt...
Unable to understand useCapture parameter in addEventListener
... from the link.
Phases
The event is dispatched following a path from the root of the tree to this target node. It can then be handled locally at the target node level or from any target's ancestors higher in the tree. The event dispatching (also called event propagation) occurs in three phases and...
'Missing contentDescription attribute on image' in XML
... be. Make sure you include xmlns:tools="schemas.android.com/tools" in your root layout.
– Sotti
Nov 11 '14 at 17:26
th...
Does a UNIQUE constraint automatically create an INDEX on the field(s)?
...email, user_id) is enough, you don't need a separate index on email only - MySQL can use leftmost parts of a composite index. There may be some border cases where the size of an index can slow down your queries, but you should not worry about them until you actually run into them.
As for testing in...