The bitap algorithm (also known as the shift-or, shift-and or Baeza-Yates–Gonnet algorithm) is an approximate string matching algorithm. The algorithm tells whether a given text contains a substring which is "approximately equal" to a given pattern, where approximate equality is defined in terms of Levenshtein distance – if the substring and pattern are within a given distance k of each other, then the algorithm considers them equal. The algorithm begins by precomputing a set of bitmasks containing one bit for each element of the pattern. Then it is able to do most of the work with bitwise operations, which are extremely fast. The bitap algorithm is perhaps best known as one of the underlying algorithms of the Unix utility agrep, written by Udi Manber, , and . Manber and Wu's original paper gives extensions of the algorithm to deal with fuzzy matching of general regular expressions. Due to the data structures required by the algorithm, it performs best on patterns less than a constant length (typically the word length of the machine in question), and also prefers inputs over a small alphabet. Once it has been implemented for a given alphabet and word length m, however, its running time is completely predictable – it runs in O(mn) operations, no matter the structure of the text or the pattern. The bitap algorithm for exact string searching was invented by Bálint Dömölki in 1964 and extended by R. K. Shyamasundar in 1977, before being reinvented by Ricardo Baeza-Yates and Gaston Gonnet in 1989 (one chapter of first author's PhD thesis) which also extended it to handle classes of characters, wildcards, and mismatches. In 1991, it was extended by Manber and to handle also insertions and deletions (full fuzzy string searching). This algorithm was later improved by Baeza-Yates and Navarro in 1996. (Wikipedia).
Bitwise Operators 1: The AND Operation
This computer science video describes the bitwise operation AND. It explains how the AND operation works with unsigned integers and how the bitwise AND operation can be used to determine whether an integer is positive or negative. It also shows how the AND operation can be used with a b
From playlist Bitwise Operators
Bitwise Operators! C tutorial 9
and, or, xor, shifting, negation, printing the binary representation of an integer
From playlist C Tutorial
Greedy Algorithm | What Is Greedy Algorithm? | Introduction To Greedy Algorithms | Simplilearn
This video on the Greedy Algorithm will acquaint you with all the fundamentals of greedy programming paradigm. In this tutorial, you will learn 'What Is Greedy Algorithm?' with the help of suitable examples. And finally, you will also discover few important applications of greedy algorithm
From playlist Data Structures & Algorithms [2022 Updated]
Algorithm Archive chapter: https://www.algorithm-archive.org/chapters/principles_of_code/building_blocks/bitlogic.html If you want to contribute, here's the github repo: https://github.com/algorithm-archivists/algorithm-archive I realize that this information might be a little basic, but
From playlist Algorithm Archive
This is the first in a sequence of videos about images. It describes the fundamental principles of a bitmap image, namely, that a bitmap is a rectangular grid of picture elements known as pixels. It explains how pixel density, which is known as the image resolution, and the number of bit
From playlist Images
Using Sympy to solve algebraic expressions and equations.
From playlist Introduction to Pyhton for mathematical programming
The Elliptic Curve Digital Signature Algorithm and raw transactions on Bitcoin
https://en.wikipedia.org/wiki/Elliptic_Curve_Digital_Signature_Algorithm https://hackernoon.com/what-is-the-math-behind-elliptic-curve-cryptography-f61b25253da3 https://en.wikipedia.org/wiki/Elliptic_curve https://en.bitcoin.it/wiki/Secp256k1 http://www.ijsrp.org/research-paper-1117/ij
From playlist Programming
Bitwise operators are used to manipulate numbers at the bit level. In this video, learn about the AND (&), OR (|), XOR (^), and shift operators. Includes lots of examples of extracting, isolating, setting, and clearing bits.
From playlist Beginning Java
Application: Encryption! C Tutorial 9.3
An application of bitwise operators
From playlist C Tutorial
What Is An Algorithm? | What Exactly Is Algorithm? | Algorithm Basics Explained | Simplilearn
This video explains what is an algorithm in the data structure. This Simplilearn's What Is An Algorithm? tutorial will help beginners to understand what exactly is an algorithm with an example. All of the algorithm basics are explained in this video. Following topics covered in this vi
From playlist Data Structures & Algorithms [2022 Updated]
Sorting Algorithms Full Course | Sorting Algorithms In Data Structures Explained | Simplilearn
This Simplilearn video is based on The Sorting Algorithms Full Course. This tutorial mainly focuses on all the major Sorting Algorithms In Data Structures Explained with detailed theory and practical examples for providing a better learning experience. This video covers the following Sort
From playlist Simplilearn Live
Lecture 1 - Introduction to Algorithms
This is Lecture 1 of the CSE373 (Analysis of Algorithms) course taught by Professor Steven Skiena [http://www.cs.sunysb.edu/~skiena/] at Stony Brook University in 2007. The lecture slides are available at: http://www.cs.sunysb.edu/~algorith/video-lectures/2007/lecture1.pdf More informati
From playlist CSE373 - Analysis of Algorithms - 2007 SBU
Lecture 1 - Introduction to Algorithms
This is Lecture 1 of the CSE373 (Analysis of Algorithms) taught by Professor Steven Skiena [http://www.cs.sunysb.edu/~skiena/] at Stony Brook University in 1997. The lecture slides are available at: http://www.cs.sunysb.edu/~algorith/video-lectures/1997/lecture1.pdf
From playlist CSE373 - Analysis of Algorithms - 1997 SBU
What Is An Algorithm ? | Introduction to Algorithms | How To Write An Algorithm? | Simplilearn
This video is based on What Is An Algorithm ? The Introduction to Algorithms tutorial will explain to you How To Write An Algorithm? and it will cover the following topics ✅00:00- Introduction to Algorithms ✅01:46- What Is an Algorithm? The algorithm is a step-by-step procedure or set o
From playlist C++ Tutorial Videos
Stanford Seminar - Participating and Designing around Algorithmic Sociotechnical Systems
Motahhare Eslami Carnegie Mellon University October 4, 2019 Algorithms play a vital role in curating online information in socio-technical systems, however, they are usually housed in black-boxes that limit users' understanding of how an algorithmic decision is made. While this opacity pa
From playlist Stanford Seminars
Ellen Vitercik: "How much data is sufficient to learn high-performing algorithms?"
Deep Learning and Combinatorial Optimization 2021 "How much data is sufficient to learn high-performing algorithms?" Ellen Vitercik - Carnegie Mellon University Abstract: Algorithms often have tunable parameters that have a considerable impact on their runtime and solution quality. A gro
From playlist Deep Learning and Combinatorial Optimization 2021
Data structure intuition is something that develops naturally for most software developers. In all languages, we rely heavily on standard containers and collections. Need fast insertion/lookup? Hashmap. Need a sorted data structure that stores unique values? Set. Duplicate values? Multiset
From playlist C++
Dynamic Graph Algorithms and Their Implementation
Abstract: While many algorithmic graph problems have been solved for static graphs, graphs that are used as models in various applications often change dynamically and, thus, require algorithms that can adapt quickly to the deletion and insertion of edges. I will start with providing an ov
From playlist SIAG-ACDA Online Seminar Series