Social network messages often use hashtags and username mentions to build connections. For example, following message mentions username such as @dummyuser and has hashtags such as #dummytag. The following examples show how to retrieve and replace hashtags and mentions using …
Apple Macintosh (Mac) does not have a print screen key. Instead, key combinations starting with ⌘ Cmd + ⇧ Shift are used to do a print screen, or screen capture. For example, ⌘ Cmd + ⇧ Shift + 3 captures …
Randomness is used in computation to design algorithms which are simpler, more efficient, or parallelizable. A randomized algorithm produces outputs based on not only the inputs but also random choices. A probabilistic Turing machine (PTM) is a deterministic Turing machine …
Consider the following promise problem: Given a boolean formula that has at most one satisfying assignment, decide whether it is unsatisfiable or it has exactly one satisfying assignment. The Valiant-Vazirani theorem says that, if this problem is solvable in polynomial …