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Check if a class is derived from a generic class
... This is a sweet piece of code, I have to say. The while loop implementation avoids the unnecessary recursion performance hit also. It's an elegant and beautiful solution to a meta-generic question.
– EnocNRoll - AnandaGopal Pardue
Jan 19 '09 at 18:26
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Difference between initLoader and restartLoader in LoaderManager
...r this question you need to dig into the LoaderManager code.
While the documentation for LoaderManager itself isn't clear enough (or there wouldn't be this question), the documentation for LoaderManagerImpl, a subclass of the abstract LoaderManager, is much more enlightening.
initLoader
Call t...
How well is Unicode supported in C++11?
...an through the library facilities that might provide Unicode support gives me this list:
Strings library
Localization library
Input/output library
Regular expressions library
I think all but the first one provide terrible support. I'll get back to it in more detail after a quick detour through y...
git merge: apply changes to code that moved to a different file
I am attempting a pretty beefy git merge maneuver right now. One problem that I am coming across is that I made some changes to some code in my branch, but my colleague moved that code to a new file in his branch. So when I did git merge my_branch his_branch , git did not notice that the code in ...
Is there a way to detect if an image is blurry?
...ining the terms 'low' and 'high' is up to you.
Edit:
As stated in the comments, if you want a single float representing the blurryness of a given image, you have to work out a suitable metric.
nikie's answer provide such a metric. Convolve the image with a Laplacian kernel:
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1 -4 1
1
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Transaction isolation levels relation with locks on table
... and commit/rollback (depending on results). B just executes a SELECT statement to read data. C reads and updates data. All these process work on the same table T.
READ UNCOMMITTED - no lock on the table. You can read data in the table while writing on it. This means A writes data (uncommitted) an...
Best explanation for languages without null
Every so often when programmers are complaining about null errors/exceptions someone asks what we do without null.
11 Answe...
How to explain callbacks in plain english? How are they different from calling one function from ano
...re they different from calling one function from another function taking some context from the calling function? How can their power be explained to a novice programmer?
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How do I create a simple 'Hello World' module in Magento?
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First and foremost, I highly recommend you buy the PDF/E-Book from PHP Architect. It's US$20, but is the only straightforward "Here's how Magento works" resource I've been able to find. I've also started writing Magento tutorials at my own website.
Second, i...
Android Fragments. Retaining an AsyncTask during screen rotation or configuration change
...resources as is needed depending on screen size, the best design choice seemed to be using Fragments via the ACL.
12 Answer...