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HTTP Parameter Pollution (HPP) is a web application vulnerability exploited by injecting encoded query string delimiters in already existing parameters.The vulnerability occurs if user input is not correctly encoded for output by a web application. [1]
(October 2023) (Learn how and when to remove this message) In computer science , the Apostolico–Giancarlo algorithm is a variant of the Boyer–Moore string-search algorithm , the basic application of which is searching for occurrences of a pattern P {\displaystyle P} in a text T {\displaystyle T} .
The problem of finding the longest substring with at least occurrences can be solved by first preprocessing the tree to count the number of leaf descendants for each internal node, and then finding the deepest node with at least leaf descendants. To avoid overlapping repeats, you can check that the list of suffix lengths has no consecutive ...
In computer science, the Knuth–Morris–Pratt algorithm (or KMP algorithm) is a string-searching algorithm that searches for occurrences of a "word" W within a main "text string" S by employing the observation that when a mismatch occurs, the word itself embodies sufficient information to determine where the next match could begin, thus bypassing re-examination of previously matched characters.
The Boyer–Moore algorithm searches for occurrences of P in T by performing explicit character comparisons at different alignments. Instead of a brute-force search of all alignments (of which there are n − m + 1 {\displaystyle n-m+1} ), Boyer–Moore uses information gained by preprocessing P to skip as many alignments as possible.
[1] pp.142--143 Since the same variable symbol may appear in multiple places in an expression, some occurrences of the variable symbol may be free while others are bound, [1] p.78 hence "free" and "bound" are at first defined for occurrences and then generalized over all occurrences of said variable symbol in the expression. However it is done ...
One way to use the level-wise paradigm is to first discover all the frequent items in a level-wise fashion. It simply means counting the occurrences of all singleton elements in the database. Then, the transactions are filtered by removing the non-frequent items. At the end of this step, each transaction consists of only the frequent elements ...
A possible implementation of t is as a set of pairs of the form (v i, c i) where each v i is a distinct value in t and c i is the number of occurrences of v i in t. Then d is the size of this set. The step "Delete k distinct values from t" amounts to reducing each c i by 1 and then removing any pair (v i, c i) from the set if c i becomes 0.