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Why does Dijkstra's algorithm use decrease-key?
...hm that reinserts nodes into the priority queue with their new priorities, one node is added to the priority queue for each of the m edges in the graph. This means that there are m enqueue operations and m dequeue operations on the priority queue, giving a total runtime of O(m Te + m Td), where Te ...
Foreign keys in mongo?
...field :name
has_many :scores
end
Edit:
> db.foo.insert({group:"phones"})
> db.foo.find()
{ "_id" : ObjectId("4df6539ae90592692ccc9940"), "group" : "phones" }
{ "_id" : ObjectId("4df6540fe90592692ccc9941"), "group" : "phones" }
>db.foo.find({'_id':ObjectId("4df6539ae...
Pointers, smart pointers or shared pointers? [duplicate]
...r passing to other methods, as well as releasing the pointer, allowing someone else to own it. Copying them does not make sense.
Shared pointers is a stack-allocated object that wraps a pointer so that you don't have to know who owns it. When the last shared pointer for an object in memory is destru...
Must Dependency Injection come at the expense of Encapsulation?
...using an OO language as the 'host', but the ideas behind IoC come from component-oriented software engineering, not OO.
Component software is all about managing dependencies - an example in common use is .NET's Assembly mechanism. Each assembly publishes the list of assemblies that it references, a...
FileSystemWatcher Changed event is raised twice
...ation event generates multiple Created events that are handled by your component. For example, if you use a FileSystemWatcher component to monitor the creation of new files in a directory, and then test it by using Notepad to create a file, you may see two Created events generated even though only a...
When to use inline function and when not to use it?
...y inlined. The degree of cleverness of a compiler cannot be legislated, so one compiler might generate 720, another 6 * fac(5), and yet another an un-inlined call fac(6).
To make inlining possible in the absence of unusually clever compilation and linking facilities, the definition–and not j...
What's the difference between an exclusive lock and a shared lock?
... them to finish reading before she clears the board to write more => If one or more shared locks already exist, exclusive locks cannot be obtained.
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Argmax of numpy array returning non-flat indices
...g to get the indices of the maximum element in a Numpy array.
This can be done using numpy.argmax . My problem is, that I would like to find the biggest element in the whole array and get the indices of that.
...
Checkout multiple git repos into same Jenkins workspace
...
Checking out more than one repo at a time in a single workspace is not possible with Jenkins + Git Plugin.
As a workaround, you can either have multiple upstream jobs which checkout a single repo each and then copy to your final project workspace ...
How do I check if a string contains another string in Swift?
...tain a member named 'containsString'.
So, you're left with a few options, one of which is to explicitly bridge your String to Objective-C by using bridgeToObjectiveC() other two involve explicitly using an NSString and the final one involves casting the String to an NSString
By bridging, you'd get...