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Why does NULL = NULL evaluate to false in SQL server
...always evaluates to false. This is counterintuitive and has caused me many errors. I do understand the IS NULL and IS NOT NULL keywords are the correct way to do it. But why does SQL server behave this way?
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How to get the directory of the currently running file?
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Is it possible for there to be an error here? If so, what would the error be, just out of curiosity?
– Jeff Escalante
Jun 30 '14 at 15:59
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How can I delete a service in Windows?
...d in as the administrator, but also with administrative rights. If you get errors above about not having the necessary access rights to stop and/or delete the service, run the command prompt as an administrator. You can do this by searching for the command prompt on your start menu and then right-cl...
ImportError: numpy.core.multiarray failed to import
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I was getting the same error and was able to solve it by updating my numpy installation to 1.8.0:
pip install -U numpy
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What is a faster alternative to Python's http.server (or SimpleHTTPServer)?
...nface, did you definitely use the -g option, and did you make sure that no errors were printed during the installation? That error just means it cannot be found after the install, which seems unlikely if things went well. What platform are you on? Run a find command across your drive to find a file ...
How do I set up NSZombieEnabled in Xcode 4?
... aid that increases memory use (no object is really released) but improves error reporting.
A typical case is when you over-release an object and you don't know which one:
With zombies: -[UITableView release]: message sent to deallocated instance
Without zombies:
This Xcode setting is ign...
How to use the “number_to_currency” helper method in the model rather than view?
...(because it shouldn’t).
As for using helpers for ActiveModel validation errors in the model, well, I’m sorry but ActiveModel/Rails has screwed us all there by forcing error messages to be realized in the data layer, rather than returning the semantic idea of an error to be realized later—sigh...
Activity has leaked ServiceConnection @438030a8 that was original
...d thus the system thinks the service is no longer required and causes that error (and then probably stops the service).
Example
In this example the service should be kept running regardless of whether the calling activity is running.
ComponentName myService = startService(new Intent(this, myCla...
How do I write outputs to the Log in Android?
... in Log.w(...) stands for warning. There are more versions: d - debug, e - error, i - info, v - verbose, wtf - What a Terrible Failure. ;-)
– patryk.beza
May 19 '16 at 10:13
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SQL Query to concatenate column values from multiple rows in Oracle
...ted string exceeds 4000 characters( limit for VARCHAR2 in SQL ), the below error is thrown, which is difficult to manage in Oracle versions upto 12.1
ORA-01489: result of string concatenation is too long
A new feature added in 12cR2 is the ON OVERFLOW clause of LISTAGG.
The query including t...