A breath-taking exploration of memory and what it means to be human, Recursion is the follow-up novel to the smash-hit thriller, Dark Matter, by Blake Crouch. What if someone could rewrite your entire life? 'My son has been erased.' Those are the last words the woman tells Barry Sutton, before she leaps from the Manhattan rooftop. Deeply unnerved, Barry begins to investigate her death, only to learn that this wasn't an isolated case. All across the country, people are waking up to lives different than the ones they fell asleep to. Are they suffering from False Memory Syndrome, a mysterious, new disease that afflicts people with vivid memories of a life they never lived? Or is something far more sinister behind the fracturing of reality all around him? Miles away, neuroscientist Helena Smith is developing a technology that allows us to preserve our most intense memories, and relive them. If she succeeds, anyone will be able to re-experience a first kiss, the birth of a child, the final moment with a dying parent. Barry's search for the truth leads him on an impossible, astonishing journey, as he discovers that Helena's work has yielded a terrifying gift - the ability not just to preserve memories, but to remake them . . . at the risk of destroying what it means to be human. PRAISE FOR RECURSION 'It's not often I plough through a book in two days. But Blake Crouch's action-packed, brilliantly unique Recursion had me up late and shirking responsibilities until I had devoured the last page. A fantastic read' Andy Weir, author of The Martian 'Recursion takes mind-twisting premises and embeds them in a deeply emotional story about time and loss and grief and most of all, the glory of the human heart' Gregg Hurwitz, author of the Orphan X series 'Blake Crouch has invented his own brand of page-turner--fearlessly genre-bending, consistently surprising, and determined to explode the boundaries of what a thriller can be' Karin Slaughter, author of the Grant County series 'Blake Crouch's fantastic, mind-blowing philosophical thriller' Yahoo News
Posters for a recursive and explicit unit. Topics include: -Explicit arithmetic and geometric formulas -Recursive arithmetic and geometric formulas -Graphing in slope intercept form -Discrete vs continuous -Linear vs nonlinear -Growth vs decay -Interpreting situations -Linear parent function -Horizontal vs vertical
NEW YORK TIMES BESTSELLER - OVER ONE MILLION COPIES SOLD! - NOW STREAMING ON APPLE TV+ A "mind-blowing" (Entertainment Weekly) speculative thriller about an ordinary man who awakens in a world inexplicably different from the reality he thought he knew--from the author of Upgrade, Recursion, and the Wayward Pines trilogy "Are you happy with your life?" Those are the last words Jason Dessen hears before the kidnapper knocks him unconscious. Before he awakens to find himself strapped to a gurney, surrounded by strangers in hazmat suits. Before a man he's never met smiles down at him and says, "Welcome back, my friend." In this world he's woken up to, Jason's life is not the one he knows. His wife is not his wife. His son was never born. And Jason is not an ordinary college professor but a celebrated genius who has achieved something remarkable. Something impossible. Is it this life or the other that's the dream? And even if the home he remembers is real, how will Jason make it back to the family he loves? From the bestselling author Blake Crouch, Dark Matter is a mind-bending thriller about choices, paths not taken, and how far we'll go to claim the lives we dream of.
In mathematics and computer science, recursion is a common term. Recursion is a process that is in principle infinite and contains itself as part or can be defined with the help of itself. Usually, recursive processes can be described relatively briefly or can be triggered by a relatively short statement. In recursion, the successive sub-processes …
An accessible yet rigorous crash course on recursive programming using Python and JavaScript examples. Recursion has an intimidating reputation: it's considered to be an advanced computer science topic frequently brought up in coding interviews. But there's nothing magical about recursion. The Recursive Book of Recursion uses Python and JavaScript examples to teach the basics of recursion, exposing the ways that it's often poorly taught and clarifying the fundamental principles of all recursive algorithms. You'll learn when to use recursive functions (and, most importantly, when not to use them), how to implement the classic recursive algorithms often brought up in job interviews, and how recursive techniques can help solve countless problems involving tree traversal, combinatorics, and other tricky topics. This project-based guide contains complete, runnable programs to help you learn: How recursive functions make use of the call stack, a critical data structure almost never discussed in lessons on recursionHow the head-tail and \"leap of faith\" techniques can simplify writing recursive functionsHow to use recursion to write custom search scripts for your filesystem, draw fractal art, create mazes, and moreHow optimization and memoization make recursive algorithms more efficient Al Sweigart has built a career explaining programming concepts in a fun, approachable manner. If you've shied away from learning recursion but want to add this technique to your programming toolkit, or if you're racing to prepare for your next job interview, this book is for you.
Computability Theory: An Introduction to Recursion Theory provides a concise, comprehensive, and authoritative introduction to contemporary computability theory, techniques, and results. The basic concepts and techniques of computability theory are placed in their historical, philosophical and logical context. This presentation is characterized by an unusual breadth of coverage and the inclusion of advanced topics not to be found elsewhere in the literature at this level. The text includes both the standard material for a first course in computability and more advanced looks at degree structures, forcing, priority methods, and determinacy. The final chapter explores a variety of computability applications to mathematics and science. Computability Theory is an invaluable text, reference, and guide to the direction of current research in the field. Nowhere else will you find the techniques and results of this beautiful and basic subject brought alive in such an approachable way. Frequent historical information presented throughoutMore extensive motivation for each of the topics than other texts currently availableConnects with topics not included in other textbooks, such as complexity theory
learn how to Reverse a list using recursion with a detailed explanation, algorithm, and source code: Take two-pointers L & R, L point to the first character...
Recursion isn't the hardest principle to understand, but often is not a way of thinking that comes most naturally for developers.
Algorithm examples include sorting, divide and conquer, greedy, recursion, dynamic programming, etc, Algorithm types categorize them.
Recursive sequences and recursive formulas can be tricky for students. This foldable introduces recursive notation and then connects it to writing recursive formulas for arithmetic and geometric sequences. 17 examples are included! ⚠️ Students should have existing knowledge of arithmetic and geometr...
See how to get the golden ratio formula, derived from a simple proportion. This is the complete golden ratio proof explained.
Recursion
NEW YORK TIMES BESTSELLER • From the bestselling author of Dark Matter and the Wayward Pines trilogy comes a relentless thriller about time, identity, and memory—his most mind-boggling, irresistible work to date, and the inspiration for Shondaland’s upcoming Netflix film. “Gloriously twisting . . . a heady campfire tale of a novel.”—The New York Times Book Review NAMED ONE OF THE BEST BOOKS OF THE YEAR BY Time • NPR • BookRiot Reality is broken. At first, it looks like a disease. An epidemic that spreads through no known means, driving its victims mad with memories of a life they never lived. But the force that’s sweeping the world is no pathogen. It’s just the first shock wave, unleashed by a stunning discovery—and what’s in jeopardy is not our minds but the very fabric of time itself. In New York City, Detective Barry Sutton is closing in on the truth—and in a remote laboratory, neuroscientist Helena Smith is unaware that she alone holds the key to this mystery . . . and the tools for fighting back. Together, Barry and Helena will have to confront their enemy—before they, and the world, are trapped in a loop of ever-growing chaos. Praise for Recursion “An action-packed, brilliantly unique ride that had me up late and shirking responsibilities until I had devoured the last page . . . a fantastic read.” —Andy Weir, #1 New York Times bestselling author of The Martian “Another profound science-fiction thriller. Crouch masterfully blends science and intrigue into the experience of what it means to be deeply human.” —Newsweek “Definitely not one to forget when you’re packing for vacation . . . [Crouch] breathes fresh life into matters with a mix of heart, intelligence, and philosophical musings.” —Entertainment Weekly “A trippy journey down memory lane . . . [Crouch’s] intelligence is an able match for the challenge he’s set of overcoming the structure of time itself.” —Time “Wildly entertaining . . . another winning novel from an author at the top of his game.” —AV Club
Leetcode is famous for being a perfect platform for practicing coding problems and to master coding interviews, unlike others, it is not for competitive programming, this guide will help you to get started with Leetcode without losing hope too early.
Hello guys, if you are wondering how to join multiple tables in SQL to produce a combine result which contains columns from all tables but not sure how to do it then you have come to the right place. SQL Join is one of the basic concepts while working in databases or tables but yet less understood and most confusing topic for beginners and even intermediate developers. I compare Joins in SQL with Recursion in programming in terms of confusion because I have found that these two topics are special in their nature and you can't get it right with casual reading until you understand the concept and its various well. Things get worse when the table locked due to such SQL Join queries which were fired without knowing how much time it would and how big the result set could be. This is the most common problem we face in our database environment, I would suggest not running any Join Queries in Production until you have tested that with the production-like environment with a similar amount of data. I have read a lot of good articles explaining SQL joins on multiple tables with examples of joins but yet most of them don't focus on the importance of data, which I see as most important for understanding joins. In my opinion to understand SQL Joins you first need to understand when do you need Joins and then how part of Joins and we will follow the same approach, as I mentioned data is more important I suggest to familiar with example data provided in this SQL join example, once you get the data it would be easier to write SQL joins query and to understand the output of Query. 1. Why we need to Join Tables in SQL? Many times we need data from multiple tables or at least two tables for reporting purposes. In SQL, Join is used to fetch data from multiple tables. So it's simple if you need data from more than one table, use Joins. 2. Types of SQL JoinsThere are three main categories of Joins in SQL called Inner Join, Outer Join, and Cross Join. Outer Join is further divided into three namely Left Outer Join, Right Outer Join, and Full Outer Join. Inner Join: Only Matching data from two tables included in the result set. Left Outer Join: All data from left tables and matching data from the right table. null will be used to populate rows that don't have a match on the right side. Right Outer Join: All data from the Right table and matching data from the left table. again null will be used to fill cells that don't have matching data on the left side. Full Outer Join: All data from Both Tables Cross Join: This is multiplication which results in 8x8=64 rows if both tables have 8 columns and are very careful before running this even accidentally on a large table, which could potentially lock the table for a long time. 3. How SQL Joins Works?To predict the result of SQL Join queries, you need to understand how Join works. My understanding is simple which might not be the way exact way the database will perform join. In SQL Join we have a common column between two tables and data of this column is used in the comparison. How I understood join is to take one row from table1 and compare it with all rows in the table2, based on the type of join I include the row in the result set. for example, if we are doing inner join then only rows with matching key values will be included in ResultSet. 4. Implicit Join and Explicit Join These are two different ways we can write SQL Join Queries. Explicit Join is joined with ON clause: select a.*, b.* from table a inner join table b on a.id = b.id; Implicit Join is Join without ON Clause, instead WHERE Clause is used as a condition. select a.*, b.* from table a, table b where a.id = b.id; Though their syntax slightly different performance-wise they are the same. I recommend using the "ON" clause or Explicit Join because once you see this "ON" clause you immediately know it's Join and we are joining two tables. 5. Equi Join Example in MySQLEqui Join is not a different type of join but a term used to refer to queries that involve two instances of the same table for Join in SQL. One of the best examples of Equi Join which I remember is the following. we have the following table Employee which holds its Manager ID. Now we need to print a report with Employee and their Manager Name. If you look at closely all the information we need like Employee Name and Manager Name in is just one table EMP, though we don't have a column for Manager name so it's not straightforward to produce the report. This problem can easily be solved by joining two instances of the same table and picking up the manager name from the second instance based on the condition specified in the ON Clause. SQL Join Examples for Beginners Now, let's see examples of different types of join in SQL class. For all those examples, we'll use the following combination of Employee and Department tables. mysql> select from Employee; +--------+----------+---------+ | emp_id | emp_name | dept_id | +--------+----------+---------+ | 1 | Ashwin | 101 | | 2 | James | NULL | | 3 | Kathy | NULL | | 4 | Harry | 102 | +--------+----------+---------+ 4 rows in set (0.00 sec) mysql> select from department; +---------+-----------+ | dept_id | dept_name | +---------+-----------+ | 101 | Sales | | 102 | Marketing | | 103 | NULL| | 104 | NULL| +---------+-----------+ 4 rows in set (0.00 sec) 1. INNER JOIN Example in MySQL Here is an example of inner join in MySQL. You can see that only Employees who have corresponding records in Department tables are included. James and Kathy were not included because dept_id for him was NULL. Similarly, departments with id 103 and 104 were also not included because there were no employees for them. mysql> select e.emp_name, d.dept_name from Employee e INNER JOIN Department d ON e.dept_id=d.dept_id -> ; +----------+-----------+ | emp_name | dept_name | +----------+-----------+ | Ashwin | Sales | | Harry | Marketing | +----------+-----------+ 2 rows in set (0.00 sec) 2. LEFT OUTER JOIN Example in MySQL Here is an example of Left outer join in MySQL. You can see that in the output, all rows of Employee tables are included and only matching rows of Department tables are included because the Employee table is on the left side of the join statement. mysql> select e.emp_name, d.dept_name from Employee e LEFT OUTER JOIN Department d ON e.dept_id=d.dept_id; +----------+-----------+ | emp_name | dept_name | +----------+-----------+ | Ashwin | Sales | | James | NULL | | Kathy | NULL | | Harry | Marketing | +----------+-----------+ 4 rows in set (0.00 sec) 3. RIGHT OUTER JOIN Example in MySQL This is an example of a right outer join, its very similar to the example of left outer join but this time we have all the department even if they are no employees on them. It doesn't matter if they have NULL values or not. mysql> select e.emp_name, d.dept_name from Employee e RIGHT OUTER JOIN Department d ON e.dept_id=d.dept_id; +----------+-----------+ | emp_name | dept_name | +----------+-----------+ | Ashwin | Sales | | Harry | Marketing | | NULL | NULL | | NULL | NULL | +----------+-----------+ 4 rows in set (0.00 sec) 4. CROSS JOIN Example in MySQL And, here is the example of cross join, very risk and very simple. If you run this query involving tables with millions of rows, it might blow up your database, take ages to complete, and log, etc. In short, never run this kind of join queries in production, they are just for educational purposes or for someone who knows what they are doing and involves tables with just a few records. mysql> select e.emp_name, d.dept_name from Employee e, Department d;+----------+-----------+ | emp_name | dept_name | +----------+-----------+ | Ashwin | Sales | | James | Sales | | Kathy | Sales | | Harry | Sales | | Ashwin | Marketing | | James | Marketing | | Kathy | Marketing | | Harry | Marketing | | Ashwin | NULL | | James | NULL | | Kathy | NULL | | Harry | NULL | | Ashwin | NULL | | James | NULL | | Kathy | NULL | | Harry | NULL | +----------+-----------+ 16 rows in set (0.00 sec) Important points about SQL join worth remembering:Here are some important points about the SQL Join concept which every programmer should remember: 1. Apart from = (equals to) in join which is called equijoin, you can also use other conditional operators like >=, <=, <>, , etc. 2. In T-SQL and Oracle SQL and even in MySQL if you just specify "join" it will be interpreted as "inner join" but it's not guaranteed to all databases. 3. You can join on columns that are not included in the result set. 4. If both tables have a column with the same name then you must specify that column with a table name to avoid ambiguity. 5.You can join more than two tables in SQL as shown in this example. That's all about how to use JOIN in MySQL. This is one of the most important concepts to learn for any developer and you should spend some time learning JOINs. At least you should be aware of different types of join like LEFT and RIGHT as well as INNER And OUTER JOIN. You should also know how to join more than 2 tablets in a single query to produce results. Other related SQL queries, Interview questions, and articles: How to join three tables in one single SQL query (solution) Write a SQL query to find all table names on a database in MySQL (solution) 5 Courses to learn Database and SQL Better (courses) The real difference between WHERE and HAVING clause in SQL? (answer) 5 Courses to learn Oracle and Microsoft SQL Server database (courses) Difference between Self and Equi Join in SQL? (answer) 4 Free Books to learn Microsoft SQL Server database (books) Top 5 Websites to learn SQL online for FREE? (websites) 5 Free Courses to learn Database and SQL (free courses) What is the difference between View and Materialized View in Database? (answer) Difference between clustered and non-clustered indexes in SQL? (answer) Difference between Primary and Candidate key in the table? (answer) 5 Free Courses to learn T-SQL and SQL Server for Beginners (Courses) Difference between the Unique and Primary keys in the table? (answer) 5 Free Courses to learn Oracle and SQL Server? (courses) Top 5 Courses to learn Microsoft SQL Server in-depth (courses) How to migrate SQL queries from Oracle to SQL Server? (answer) Top 5 Websites to learn SQL online for FREE? (resource) What is the difference between UNION and UNION ALL in SQL? (answer) Write a SQL query to copy or backup a table in MySQL (solution) How do you find the duplicate rows in a table on a database? (solution) 5 Advanced SQL books to level up your SQL skills (books) Top 5 Courses to learn MySQL Database for Beginners (Courses) Top 5 Courses to learn PostgreSQL in-depth (courses) 5 Free Courses to learn T-SQL and SQL Server for Beginners (Courses) Difference between Primary and Foreign keys in the table? (answer) Thanks for reading this article, if you like this SQL Join Tutorial, then please share it with your friends and colleagues. If you have any questions or feedback, then please drop a note.
This tutorial shows how to implement factorial formula in Java in a recursive manner and explains the code in detail. It also explains how factorial calculation is inherently recursive in nature.|This tutorial shows how to implement factorial formula in Java in a recursive manner and explains the code in detail. It also explains how factorial calculation is inherently recursive in nature.
Fibonacci series in java with examples of fibonacci series, armstrong number, prime number, palindrome number, factorial number, bubble sort, selection sort, insertion sort, swapping numbers etc.
