Search results
Results from the WOW.Com Content Network
The longest common substrings of a set of strings can be found by building a generalized suffix tree for the strings, and then finding the deepest internal nodes which have leaf nodes from all the strings in the subtree below it. The figure on the right is the suffix tree for the strings "ABAB", "BABA" and "ABBA", padded with unique string ...
String functions are used in computer programming languages to manipulate a string or query information about a string (some do both).. Most programming languages that have a string datatype will have some string functions although there may be other low-level ways within each language to handle strings directly.
Regular expressions are used in search engines, in search and replace dialogs of word processors and text editors, in text processing utilities such as sed and AWK, and in lexical analysis. Regular expressions are supported in many programming languages. Library implementations are often called an "engine", [4] [5] and many of these are ...
For example, the expression a < b < c tests whether a is less than b and b is less than c. [126] C-derived languages interpret this expression differently: in C, the expression would first evaluate a < b, resulting in 0 or 1, and that result would then be compared with c. [127] Python uses arbitrary-precision arithmetic for all integer operations.
A fuzzy Mediawiki search for "angry emoticon" has as a suggested result "andré emotions" In computer science, approximate string matching (often colloquially referred to as fuzzy string searching) is the technique of finding strings that match a pattern approximately (rather than exactly).
For every long enough string in a regular language, there must be a middle section (y) that can be repeated (or pumped) any number of times to produce a string still in the language. In the theory of formal languages, the pumping lemma for regular languages is a lemma that describes an essential property of all regular languages.
5.5 Regular expression. ... Applying the equality operator ("==") to two strings returns true, if the strings have the same contents, which means: of the same length ...
A generalized regular expression can be one of the following (where a is a symbol of the alphabet A, and R and S are generalized regular expressions): "∅" denotes the empty set: L(∅) = {}, "ε" denotes the singleton set containing the empty string: L(ε) = {ε}, "a" denotes the singleton set containing the single-symbol string a: L(a) = {a},