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Θ ( n 3 ) {\displaystyle \Theta (n^ {3})} In computer science, the Earley parser is an algorithm for parsing strings that belong to a given context-free language, though (depending on the variant) it may suffer problems with certain nullable grammars. [1] The algorithm, named after its inventor, Jay Earley, is a chart parser that uses dynamic ...
Recursion (computer science) Tree created using the Logo programming language and relying heavily on recursion. Each branch can be seen as a smaller version of a tree. Recursive drawing of a Sierpiński Triangle through turtle graphics. In computer science, recursion is a method of solving a computational problem where the solution depends on ...
Loop invariant. In computer science, a loop invariant is a property of a program loop that is true before (and after) each iteration. It is a logical assertion, sometimes checked with a code assertion. Knowing its invariant (s) is essential in understanding the effect of a loop. In formal program verification, particularly the Floyd-Hoare ...
A recursive step — a set of rules that reduces all successive cases toward the base case. For example, the following is a recursive definition of a person's ancestor. One's ancestor is either: One's parent (base case), or; One's parent's ancestor (recursive step). The Fibonacci sequence is another classic example of recursion: Fib(0) = 0 as ...
Recursion: Some algorithms are either recursive or non-recursive, while others may be both (e.g., merge sort). Stability: stable sorting algorithms maintain the relative order of records with equal keys (i.e., values). Whether or not they are a comparison sort. A comparison sort examines the data only by comparing two elements with a comparison ...
In computing, tree is a recursive directory listing command or program that produces a depth-indented listing of files. Originating in PC- and MS- DOS, it is found in Digital Research FlexOS, [1] IBM / Toshiba 4690 OS, [2] PTS-DOS, [3] FreeDOS, [4] IBM OS/2, [5] Microsoft Windows, [6] and ReactOS. A version for Unix and Unix-like systems is ...
Cheatsheet. For a complete list of wikitext codes, see Help:Wikitext. For information on special words, see Help:Magic words. Links to pages that don't exist are automatically red. Red links in articles often help by showing desired redirects or notable pages. sources in the article will appear where { {reflist}} is put, typically under a level ...
A recursive language is a formal language for which there exists a Turing machine that, when presented with any finite input string, halts and accepts if the string is in the language, and halts and rejects otherwise. The Turing machine always halts: it is known as a decider and is said to decide the recursive language.