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...
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...
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...
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...
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"....
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...
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...