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When to use Common Table Expression (CTE)
...set multiple times you can do so by defining a CTE. Therefore, it can be a form of code re-use.
An example of self referencing is recursion: Recursive Queries Using CTE
For exciting Microsoft definitions
Taken from Books Online:
A CTE can be used to:
Create a recursive query. For more informati...
How to get active user's UserDetails
...Security,
need to load your custom User Object from the Database by some information (like the login or id) stored in the principal or
want to learn how a HandlerMethodArgumentResolver or WebArgumentResolver can solve this in an elegant way, or just want to an learn the background behind @Authentica...
Android SharedPreference security
...xtensive discussion about this in Application Security for the Android Platform, just published in December 2011 (disclaimer: I'm the author of this book).
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How to use the pass statement?
...ss ParsingError(Exception):
"""Error encountered while parsing an ill-formed datafile."""
pass
In some cases, pass is used as a placeholder to say “This method/class/if-block/... has not been implemented yet, but this will be the place to do it”, although I personally prefer the Ellips...
Find where python is installed (if it isn't default dir)
...
sys has some useful stuff:
$ python
Python 2.6.6 (r266:84297, Aug 24 2010, 18:13:38) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.executable
'c:\\Python26\\python.exe'
>>> sys.exec_p...
Initializing a struct to 0
...ing point zero) are represented as all zero bits, which is true on all platforms I know about (but the C standard permits implementations where this is false; I know no such implementation).
You could perhaps code myStruct m = {}; or myStruct m = {0}; (even if the first member of myStruct is not a...
IIS: Idle Timeout vs Recycle
...xchange.using('gps', function() { StackExchange.gps.track('embedded_signup_form.view', { location: 'question_page' }); });
$window.unbind('scroll', onScroll);
}
};
...
Basic HTTP and Bearer Token Authentication
... @Azngeek Curl does send both the authorization headers when you perform the task. You need to handle it from your server's end. Just run your curl command with both headers with -v param. You'll find that its sending Authorization: Basic Ym9zY236Ym9zY28=, Authorization: Bearer mytoken123 at ...
What's the canonical way to check for type in Python?
...):
See Built-in Functions in the Python Library Reference for relevant information.
One more note: in this case, if you're using Python 2, you may actually want to use:
if isinstance(o, basestring):
because this will also catch Unicode strings (unicode is not a subclass of str; both str and un...
What does the line “#!/bin/sh” mean in a UNIX shell script?
... the operating system will look at the first few bytes of the file. These form the so-called "magic number", which can be used to decide the format of the program and how to execute it.
#! corresponds to the magic number 0x2321 (look it up in an ascii table). When the system sees that the magic n...