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Is there a way to detect if a browser window is not currently active?
... user is still able to see it (so it still need to be refreshed). See also http://javascript.info/tutorial/focus
Relying on user activity (mouse move, clicks, key typed) gives you a lot of false positive too. Think about the same case as above, or a user watching a video.
In order to improve the i...
android splash screen sizes for ldpi,mdpi, hdpi, xhdpi displays ? - eg : 1024X768 pixels for ldpi
...it the size of the screen without affecting the static area of the image.
http://developer.android.com/guide/topics/graphics/2d-graphics.html#nine-patch
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CSS z-index paradox flower
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Here's my attempt: http://jsfiddle.net/Kx2k5/1/
(successfully tested on Fx27, Ch33, IE9, Sf5.1.10 and Op19)
CSS
.item {
/* include borders on width and height */
-webkit-box-sizing : border-box;
-moz-box-sizing : border-box;
...
Rails: Default sort order for a rails model?
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You can use default_scope to implement a default sort order
http://api.rubyonrails.org/classes/ActiveRecord/Scoping/Default/ClassMethods.html
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What data is stored in Ephemeral Storage of Amazon EC2 instance?
...ou don't have to worry about data on your root device.
More details here: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/RootDeviceStorage.html
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How can I use redis with Django?
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This Python module for Redis has a clear usage example in the readme: http://github.com/andymccurdy/redis-py
Redis is designed to be a RAM cache. It supports basic GET and SET of keys plus the storing of collections such as dictionaries. You can cache RDBMS queries by storing their output in ...
what does the __file__ variable mean/do?
...are considered to be "special" by convention and serve a special purpose.
http://docs.python.org/reference/datamodel.html shows many of the special methods and attributes, if not all of them.
In this case __file__ is an attribute of a module (a module object). In Python a .py file is a module. S...
Why are unsigned int's not CLS compliant?
...VB7/7.1 not to implement as well (it's implemented now in VB8).
To quote:
http://msdn.microsoft.com/en-us/library/12a7a7h3.aspx
The CLS was designed to be large enough to include the language
constructs that are commonly needed by developers, yet small enough
that most languages are able to support...
When to use a key/value store such as Redis instead/along side of a SQL database?
...I think nothing explains better the use cases for Redis than this article:
http://antirez.com/post/take-advantage-of-redis-adding-it-to-your-stack.html
I bet you'll have an aha! moment. ;)
A quote from a previous reader:
I've read about Redis before and heard how companies are using it, but ne...
What is the memory consumption of an object in Java?
...n overhead of 16 bytes on 32-bit systems (and 24-byte on 64-bit systems).
http://algs4.cs.princeton.edu/14analysis/ is a good source of information. One example among many good ones is the following.
http://www.cs.virginia.edu/kim/publicity/pldi09tutorials/memory-efficient-java-tutorial.pdf is a...