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When to use Hadoop, HBase, Hive and Pig?
...o provides us storage, but in a fault tolerant manner with high throughput and lower risk of data loss (because of the replication). But, being a FS, HDFS lacks random read and write access. This is where HBase comes into picture. It's a distributed, scalable, big data store, modelled after Google's...
Is there StartsWith or Contains in t sql with variables?
...Note that internally these work differently, especially w.r.t. performance and its use of indexes. For example, a query using colName LIKE 'prefix%' will be very fast when colName is indexed, but colName LIKE '%substring%' or colName LIKE '%suffix' will be slow because SQL Server does not create su...
Customizing Bootstrap CSS template
I am just getting started with Bootstrap from Twitter and am wondering what the ‘best practices’ is for customization. I want to develop a system that will take advantage of all the power of a css template (Bootstrap or other), be completely (and easily) modifiable, be sustainable (ie – when t...
form with no action and where enter does not reload page
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Add an onsubmit handler to the form (either via plain js or jquery $().submit(fn)), and return false unless your specific conditions are met.
Unless you don't want the form to submit, ever - in which case, why not just leave out the 'action'...
fatal error: malformed or corrupted AST file - Xcode
...e. In Xcode, go to Window->Organizer->Projects, select your project, and press the "Delete..." button next to "Derived data".
If this doesn't work, you can try to do a Product->Clean (Cmd+Shift+k).
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ssh: Could not resolve hostname [hostname]: nodename nor servname provided, or not known
I am trying to set up a VPN with a Raspberry Pi, and the first step is gaining the ability to ssh into the device from outside my local network. For whatever reason, this is proving to be impossible and I haven't the slightest clue why. When I try to ssh into my server with user@hostname , I ge...
Fastest way to tell if two files have the same contents in Unix/Linux?
...er two files contain the same data or not. I do this a for a lot of files, and in my script the diff command seems to be the performance bottleneck.
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What is the difference between -viewWillAppear: and -viewDidAppear:?
What is the difference between -[UIViewController viewWillAppear:] and -[UIViewController viewDidAppear:] ?
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Differences between Intent and PendingIntent
I read through some articles and both seem to do the same thing and I was wondering what is the difference between starting the service like that:
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How do I find out which DOM element has the focus?
...ript, which element currently has focus. I've been looking through the DOM and haven't found what I need, yet. Is there a way to do this, and how?
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