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Do Facebook Oauth 2.0 Access Tokens Expire?
... application to perform authorized requests on behalf of the user at any time. By default, most access tokens expire after a short time period to ensure applications only make requests on behalf of the user when the are actively using the application. This permission makes the access token returned ...
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
...:XE
(Note: between 1521 and XE should be a /)
This bad jdbc string give me a ORA-12505 error too.
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Detecting Unsaved Changes
I have a requirement to implement an "Unsaved Changes" prompt in an ASP .Net application. If a user modifies controls on a web form, and attempts to navigate away before saving, a prompt should appear warning them that they have unsaved changes, and give them the option to cancel and stay on the cu...
Practical uses for the “internal” keyword in C#
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Utility or helper classes/methods that you would like to access from many other classes within the same assembly, but that you want to ensure code in other assemblies can't access.
From MSDN (via archive.org):
A common use of internal access is i...
int a[] = {1,2,}; Weird comma allowed. Any particular reason?
Maybe I am not from this planet, but it would seem to me that the following should be a syntax error:
20 Answers
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How to get pixel data from a UIImage (Cocoa Touch) or CGImage (Core Graphics)?
...ow of the image or the entire image size!) I don't the performance of this method will be good since having too many UIColor objects is really heavy. In real life when I need a pixel then UIColor is ok, (An NSArray of UIColors is too much for me). And when you need bunch of colors I won't use UIColo...
What is the difference between a generative and a discriminative algorithm?
Please, help me understand the difference between a generative and a
discriminative algorithm, keeping in mind that I am just a beginner.
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How do I reset the scale/zoom of a web app on an orientation change on the iPhone?
...get it to scale correctly for the landscape mode I have to double tap on something twice, first to zoom all the way in (the normal double tap behavior) and again to zoom all the way out (again, the normal double tap behavior). When it zooms out, it zooms out to the correct NEW scale for landscape m...
What is the difference between lower bound and tight bound?
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Big O is the upper bound, while Omega is the lower bound. Theta requires both Big O and Omega, so that's why it's referred to as a tight bound (it must be both the upper and lower bound).
For example, an algorithm taking Omega(n log n) takes at least n log ...
ORA-12514 TNS:listener does not currently know of service requested in connect descriptor
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I had this issue and the fix was to make sure in tnsnames.ora the SERVICE_NAME is a valid service name in your database. To find out valid service names, you can use the following query in oracle:
select value from v$parameter where name='service_names'
Once I updated tnsname...