The image below helps show the differences between B+ trees and B trees. Advantages of B+ trees: Because B+ trees don’t have data associated with interior nodes, more keys can fit on a page of memory. Therefore, it will require fewer cache misses in order to access data that is on a leaf node. The … Read more
There are two reasons you could want to use a tree: You want to mirror the problem using a tree-like structure:For this we have boost graph library Or you want a container that has tree like access characteristics For this we have std::map (and std::multimap) std::set (and std::multiset) Basically the characteristics of these two containers is such that they practically … Read more
Java definitively has no structs 🙂 But what you describe here looks like a JavaBean kind of class.
From Guava:Â MinMaxPriorityQueue.
Note that also you can use boost.ublas for matrix creation and manipulation and also boost.graph to represent and manipulate graphs in a number of ways, as well as using algorithms on them, etc. Edit: Anyway, doing a range-check version of a vector for your purposes is not a hard thing: Note that you would also need to add the … Read more
To delete a key regardless of whether it is in the dictionary, use the two-argument form of dict.pop(): This will return my_dict[key] if key exists in the dictionary, and None otherwise. If the second parameter is not specified (i.e. my_dict.pop(‘key’)) and key does not exist, a KeyError is raised. To delete a key that is guaranteed to exist, you can also use: This will raise a KeyError if the … Read more
It’s easier to store data of different sizes in a linked list. An array assumes every element is exactly the same size. As you mentioned, it’s easier for a linked list to grow organically. An array’s size needs to be known ahead of time, or re-created when it needs to grow. Shuffling a linked list … Read more
Why are the running times of BFS and DFS O(V+E), especially when there is a node that has a directed edge to a node that can be reached from the vertex, like in this example in the following site http://www.personal.kent.edu/~rmuhamma/Algorithms/MyAlgorithms/GraphAlgor/depthSearch.htm
I want to create an adjacency matrix for a graph. Since I read it is not safe to use arrays of the form matrix[x][y] because they don’t check for range, I decided to use the vector template class of the stl. All I need to store in the matrix are boolean values. So my question is, if … Read more
You might like IntervalHeap from the C5 Generic Collection Library. To quote the user guide Class IntervalHeap<T> implements interface IPriorityQueue<T> using an interval heap stored as an array of pairs. The FindMin and FindMax operations, and the indexer’s get-accessor, take time O(1). The DeleteMin, DeleteMax, Add and Update operations, and the indexer’s set-accessor, take time O(log n). In contrast to an ordinary priority queue, an interval heap … Read more