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What is the difference between partitioning and bucketing a table in Hive ?
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Partitioning data is often used for distributing load horizontally, this has performance benefit, and helps in organizing data in a logical fashion. Example: if we are dealing with a large employee table and often run queries with WHERE clauses that restrict the results to a ...
What's the difference between using “let” and “var”?
...nvoked since anonymous functions were bound to the same variable.
People had to create immediately invoked functions to capture correct value from the loops but that was also hairy.
Hoisting
While variables declared with var keyword are hoisted (initialized with undefined before the code is run) ...
What should I use Android AccountManager for?
... a bit old, but I think it is still of good interest.
AccountManager, SyncAdapter and ContentProvidergo together.
You cannot have a SyncAdapter without an Account in the AccountManager.
You cannot have a SyncAdapterwithout a ContentProvider.
But you can:
use the ContentProvider without the ot...
Why Qt is misusing model/view terminology?
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I agree with you that Qt's naming is misleading. In my opinion however, the problem is not Qt's alone, but is shared by all frameworks that allow us to adhere to the principle of separation of concerns when implementing our UIs. When someone comes up with such a fram...
Proper practice for subclassing UIView?
...ew. When working with a UIViewController, it's fairly simple to use the loadView and related viewWill , viewDid methods, but when subclassing a UIView, the closest methosds I have are `awakeFromNib , drawRect , and layoutSubviews . (I'm thinking in terms of setup and teardown callbacks.) In ...
Graph Algorithm To Find All Connections Between Two Arbitrary Vertices
...ing, LinkedHashSet<String>> map = new HashMap();
public void addEdge(String node1, String node2) {
LinkedHashSet<String> adjacent = map.get(node1);
if(adjacent==null) {
adjacent = new LinkedHashSet();
map.put(node1, adjacent);
}
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What exactly does git's “rebase --preserve-merges” do (and why?)
...git rebase, git with --preserve-merges first identifies a list of commits made in one part of the commit graph, and then replays those commits on top of another part. The differences with --preserve-merges concern which commits are selected for replay and how that replaying works for merge commits.
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How to play a local video with Swift?
I have a short mp4 video file that I've added to my current Xcode6 Beta project.
9 Answers
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What is the difference between JSON and Object Literal Notation?
...be stored in many ways, but if it should be stored in a text file and be readable by a computer, it needs to follow some structure. JSON is one of the many formats that define such a structure.
Such formats are typically language-independent, meaning they can be processed by Java, Python, JavaScrip...
What is the effect of extern “C” in C++?
... that client C code can link to (use) your function using a C compatible header file that contains just the declaration of your function. Your function definition is contained in a binary format (that was compiled by your C++ compiler) that the client C linker will then link to using the C name.
Sin...