In machine learning, feature hashing, also known as the hashing trick (by analogy to the kernel trick), is a fast and space-efficient way of vectorizing features, i.e. turning arbitrary features into indices in a vector or matrix. It works by applying a hash function to the features and using their hash values as indices directly, rather than looking the indices up in an associative array. This trick is often attributed to Weinberger et al. (2009), but there exists a much earlier description of this method published by John Moody in 1989. (Wikipedia).
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
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
Learn how to read key-value pairs from a text file into a HashMap.
From playlist Intermediate Java
An informal introduction to cryptography. Part of a larger series teaching programming at http://codeschool.org
From playlist Cryptography
Programming Ruby 07 -- Hash Ops
Operations on Hashes in Ruby -- this is an ultra-basic tutorial, designed to give you a very brief outline of how hashes work in Ruby. This is part of a "programming fundamentals" course that's designed to prepare someone for bash. http://www.ruby-doc.org/core-2.1.5/Hash.html
From playlist Programming: Ruby
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
RubyConf 2014 - Polishing Ruby by Olivier Lacan
There are gems out there solving very common problems that could easily be contributed back to Ruby itself. Suggesting a new Ruby feature isn't as daunting as it sounds. As long as you're diligent, you too can push ruby forward. Help us caption & translate this video! http://amara.org/v/
From playlist RubyConf 2014
Blockchain Tutorial For Beginners - 1 | Blockchain Technology | Blockchain Tutorial | Simplilearn
🔥Professional Certificate Program In Blockchain: https://www.simplilearn.com/blockchain-certification-training-course?utm_campaign=Blockchain-iYYf3w4RPDA&utm_medium=Descriptionff&utm_source=youtube 🔥 Caltech Blockchain Bootcamp (US Only): https://www.simplilearn.com/blockchain-developer-ce
From playlist Blockchain Tutorial Videos 🔥[2022 Updated] | Simplilearn
Password Exploitation Class: Part 2: Hashcat and OCLHashcat 1/6
Clip 1/6 Credits: irongeek.com This is a class we gave for the Kentuckiana ISSA on the the subject of password exploitation. The Password Exploitation Class was put on as a charity event for the Matthew Shoemaker Memorial Fund ( http://www.shoecon.org/ ). The speakers were Dakykilla,
From playlist Password Exploitation Class
Blockchain Explained | How Does A Blockchain Work | Blockchain Explained Simply | Simplilearn
This "Blockchain Explained" video will help you understand what is Blockchain, what is Bitcoin, features of Blockchain which includes a public distributed ledger, hash encryption, proof of work, mining, and will also talk about the fields that use Bitcoin. Bitcoin is a decentralized, digit
From playlist Blockchain Tutorial Videos 🔥[2022 Updated] | Simplilearn
Git Tutorial: Fixing Common Mistakes and Undoing Bad Commits
In this video we will look at some common mistakes in Git and how we can fix these mistakes. Specifically we will cover how to discard changes since your last commit, amending commits, cherry-picking hashes, resetting to a specific commit, and reverting to a specific commit. ✅ Support My
From playlist Git Tutorials
Blockchain Technology Explained | What Is Blockchain? | Blockchain Tutorial | Simplilearn
🔥 Professional Certificate Program In Blockchain: https://www.simplilearn.com/blockchain-certification-training-course?utm_campaign=BlockchainTechnologyExplained-HBz_iUKlmNo&utm_medium=DescriptionFF&utm_source=youtube This "Blockchain Technology Explained" video will help you learn basic
From playlist Blockchain Tutorial Videos 🔥[2022 Updated] | Simplilearn
3. Blockchain Basics & Cryptography
MIT 15.S12 Blockchain and Money, Fall 2018 Instructor: Prof. Gary Gensler View the complete course: https://ocw.mit.edu/15-S12F18 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP63UUkfL0onkxF6MYgVa04Fn In this lecture, Prof. Gensler, explains the basics of blockchain an
From playlist MIT 15.S12 Blockchain and Money, Fall 2018
Blockchain Technology | What Is Blockchain Technology? | Blockchain Explained | Simplilearn
This video on Blockchain covers all the important concepts from basics to advanced. Also, it covers all the information about Blockchain like how it came into the picture, how Blockchain works, what are the features of Blockchain, how transactions take place in blockchain, which hashing al
From playlist Blockchain Tutorial Videos 🔥[2022 Updated] | Simplilearn
Blockchain Technology Explained | Blockchain Technology Tutorial | Blockchain Tutorial | Simplilearn
🔥 Professional Certificate Program In Blockchain: https://www.simplilearn.com/blockchain-certification-training-course?utm_campaign=BlockchainTechnologyExplained-E2JRnFgrztM&utm_medium=DescriptionFF&utm_source=youtube This "Blockchain Technology Explained" video will help you understand w
From playlist Blockchain Tutorial Videos 🔥[2022 Updated] | Simplilearn
Get the Code Here: http://goo.gl/srwIf Welcome to my Java Hash Table tutorial. A Hash Table is a data structure offers fast insertion and searching capabilities. The negative is that they are limited in size because they are based on arrays. They are also hard to order. People get confus
From playlist Java Algorithms