C++ sanity check fails: several variables/memory positions are changed to garbage, even if I never acess them
c++,pointers,skip-lists,sanity-check
Here's the output of clang's address sanitizer (after setting it up properly): ==15146==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7ffeb006bb80 at pc 0x0000004e093c bp 0x7ffeb006ba60 sp 0x7ffeb006ba58 WRITE of size 8 at 0x7ffeb006bb80 thread T0 #0 0x4e093b in insertNode(int, int) skiplist.cpp:55:27 #1 0x4e3385 in skiplist.cpp:160:9 #2 0x7f40b2fcda3f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x20a3f) #3 0x419508...
Finding All Intervals That Overlap a Point
c++,computational-geometry,intervals,skip-lists
Suggest using CGAL range trees: Wikipedia says interval trees (1-dimensional range trees) can "efficiently find all intervals that overlap with any given interval or point"....
How do I use an array of pointers in main?
c++,arrays,pointers,linked-list,skip-lists
The -> operator is a shorthand. Without the -> operator, you would write (*var).prop; With the -> operator, you write: var->prop; Thus, to store a node in the first position of the list, you write: void StoreNode(node *node){ node *temp = new node; temp->next[0]=node; } And to retrieve data from...
Searching for element in Skip List
I'm seeing a number of problems here. Where are you actually returning the value? I see no return statement, though I presume you just left out a return node; at the bottom. You're never verifying that the final value is indeed what you're looking for. You need some way to...
Skip list in java
Ok let me try to make you understand this. A skip list is a data-structure which definitely makes your searches faster in a list of given elements. A better analogy would be a network of subway in any of the bigger cities. Imagine there are 90 stations to cover and...
Generics and compareTo() method
java,eclipse,generics,compare,skip-lists
You haven't shown how E is defined, but the error message indicates that you didn't place an upper bound of Comparable<E> on the declaration of E. You can accomplish that with something like this on your class: public class SkipList<E extends Comparable<E>> This will allow you to call compareTo on...
probabilistic skip list space complexity
data-structures,asymptotic-complexity,space-complexity,skip-lists
If you don't set an upper bound on the height of the skip list, then there is no upper-bound to the worst-case space usage. For any bound you could place, there's some horribly unlucky and astronomically improbable execution of the skiplist that would result in a number of layers so...
Realistic usage of unrolled skip lists
data-structures,linked-list,skip-lists
Probably because it wouldn't typically give you much of a performance improvement, if any, and it would be somewhat involved to code correctly. First, the unrolled linked list typically uses a pretty small node size. As the Wikipedia article says: " just large enough so that the node fills a...