Hashing | Hash functions | Search algorithms
In computer science, a perfect hash function h for a set S is a hash function that maps distinct elements in S to a set of m integers, with no collisions. In mathematical terms, it is an injective function. Perfect hash functions may be used to implement a lookup table with constant worst-case access time. A perfect hash function can, as any hash function, be used to implement hash tables, with the advantage that no collision resolution has to be implemented. In addition, if the keys are not the data and if it is known that queried keys will be valid, then the keys do not need to be stored in the lookup table, saving space. Disadvantages of perfect hash functions are that S needs to be known for the construction of the perfect hash function. Non-dynamic perfect hash functions need to be re-constructed if S changes. For frequently changing S dynamic perfect hash functions may be used at the cost of additional space. The space requirement to store the perfect hash function is in O(n). The important performance parameters for perfect hash functions are the evaluation time, which should be constant, the construction time, and the representation size. (Wikipedia).
Cryptographic Hash Functions: Part 1
Cryptographic Hash Functions Applications of Crypto Hash Functions Birthday Problem Secure Hash Algorithm (SHA)
From playlist Network Security
Cryptographic Hash Functions: Part 2
Cryptographic Hash Functions Applications of Crypto Hash Functions Birthday Problem Secure Hash Algorithm (SHA)
From playlist Network Security
An informal introduction to cryptography. Part of a larger series teaching programming at http://codeschool.org
From playlist Cryptography
https://en.wikipedia.org/wiki/SHA-1#Examples_and_pseudocode If you have any questions of want to contribute to code or videos, feel free to write me a message on youtube or get my contact in the About section or googling my contacts.
From playlist Programming
Hash Tables and Hash Functions
This computer science video describes the fundamental principles of the hash table data structure which allows for very fast insertion and retrieval of data. It covers commonly used hash algorithms for numeric and alphanumeric keys and summarises the objectives of a good hash function. Co
From playlist Data Structures
MIT 6.046J Design and Analysis of Algorithms, Spring 2015 View the complete course: http://ocw.mit.edu/6-046JS15 Instructor: Ling Ren In this recitation, problems related to dynamic programming are discussed. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms
From playlist MIT 6.046J Design and Analysis of Algorithms, Spring 2015
An Introduction to Modern Hashing
A basic review of hashing by Dzejla Medjedovic, a co-author of Algorithms and Data Structures for Massive Datasets. This video is an excerpt from a live coding session by Dzejla Medjedovic. Watch the full video at: http://mng.bz/v1Am 📚📚📚 Algorithms and Data Structures for Massive Datas
From playlist Data Science
What's a hash and what's the point?
http://passwordsgenerator.net/sha256-hash-generator/ If you have any questions of want to contribute to code or videos, feel free to write Nikolaj Kuntner a message on youtube or get my contact in the About section or googling my contacts.
From playlist Programming
RailsConf 2020 CE - Keynote: Technically, a Talk by Eileen Uchitelle
Keynote: Technically, a Talk by Eileen Uchitelle "Peer deep into Rails’ database handling and you may find the code overly complex, hard to follow, and full of technical debt. On the surface you’re right - it is complex, but that complexity represents the strong foundation that keeps your
From playlist RailsConf 2020 CE
CRYPTOCURRENCY BASICS! - CS50 on Twitch, EP. 44
Join CS50's Nick Wong for a discussion on the basics of cryptocurrency, beginning with topics of hashing and continuing on to things like bitcoin, mining, blockchain, philosophy, and more. Tune in live on twitch.tv/cs50tv and be a part of the live chat. This is CS50 on Twitch.
From playlist CS50 on Twitch
Lecture 8 - Mergesort / Quicksort
This is Lecture 8 of the CSE373 (Analysis of Algorithms) course taught by Professor Steven Skiena [http://www3.cs.stonybrook.edu/~skiena/] at Stony Brook University in 2016. The lecture slides are available at: https://www.cs.stonybrook.edu/~skiena/373/newlectures/lecture8.pdf More infor
From playlist CSE373 - Analysis of Algorithms 2016 SBU
Lec 8 | MIT 6.046J / 18.410J Introduction to Algorithms (SMA 5503), Fall 2005
Lecture 08: Universal Hashing, Perfect Hashing View the complete course at: http://ocw.mit.edu/6-046JF05 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
From playlist MIT 6.046J / 18.410J Introduction to Algorithms (SMA 5503),
Cryptographic Hash Function - Applied Cryptography
This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
From playlist Applied Cryptography
Highlight: Sending chat messages when the Get the Streamer game starts and ends
Brooks updated the game to send chat messages when the game starts and ends to help viewers know when to start and end sending commands. --- Code - [https://github.com/brooks-builds/](https://github.com/brooks-builds/get_the_streamer_game)get_the_streamer_game Twitter - [https://www.twit
From playlist programming before work live streams