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In software engineering, double-checked locking (also known as "double-checked locking optimization" [1]) is a software design pattern used to reduce the overhead of acquiring a lock by testing the locking criterion (the "lock hint") before acquiring the lock.
On 1 April 2018, Stack Exchange introduced a rubber duck avatar on their websites as a new "feature" called Quack Overflow as an April Fools' Day joke. The duck appeared at the bottom right corner of the browser viewport, and attempted to help visitors by listening to their problems and responding with solutions.
The 31st edition had an expanded title: "Secret Guide to Computers & Tricky Living." That's because it combined "The Secret Guide to Computers" with Russ's other book, "Tricky Living," to form a huge book, 703 pages. That expanded title was used on the 31st edition and all later editions (the 32nd, 33rd, and 34th).
This version is usually played orally, but is easier to play if each player (or each team) keeps written notes. It is exactly like the numerical version, except instead of four-digit numbers, four-letter words are used.
Using the XOR swap algorithm to exchange nibbles between variables without the use of temporary storage. In computer programming, the exclusive or swap (sometimes shortened to XOR swap) is an algorithm that uses the exclusive or bitwise operation to swap the values of two variables without using the temporary variable which is normally required.
Here the trick item is an inconspicuous word easily overlooked by the examinee. Hopkins et al. advise against such kind of questions during tests. [6] Other types of trick question contain a word that appears to be irrelevant, but in fact provides a clue. [7] Luke 20 contains what is described as a "trick question" of Sadducees to Jesus: [8]
A dry run (or practice run) is a software testing process used to make sure that a system works correctly and will not result in severe failure. [1] For example, rsync, a utility for transferring and synchronizing data between networked computers or storage drives, has a "dry-run" option users can use to check that their command-line arguments are valid and to simulate what would happen when ...
Most programming languages have constructions for repeating a loop until some condition changes. Some variations test the condition at the start of the loop; others test it at the end. If the test is at the start, the body may be skipped completely; if it is at the end, the body is always executed at least once.