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A string rewriting system or semi-Thue system is a tuple (,) where . is an alphabet, usually assumed finite. [5] The elements of the set (* is the Kleene star here) are finite (possibly empty) strings on , sometimes called words in formal languages; we will simply call them strings here.
A regular expression (shortened as regex or regexp), [1] sometimes referred to as rational expression, [2] [3] is a sequence of characters that specifies a match pattern in text. Usually such patterns are used by string-searching algorithms for "find" or "find and replace" operations on strings, or for input validation.
For Beginners LLC is a publishing company based in Danbury, Connecticut, that publishes the For Beginners graphic nonfiction series of documentary comic books on complex topics, covering an array of subjects on the college level. Meant to appeal to students and "non-readers", as well as people who wish to broaden their knowledge without ...
How Not to Be Seen" (originally seen in Series 2, Episode 11 of Monty Python's Flying Circus): A parody of a government film which first displays the importance of not being seen, then devolves into various things being blown up, much to the amusement of the narrator (John Cleese). The narrator eventually composes himself, says "And now for ...
The Zen of Python is a collection of 19 "guiding principles" for writing computer programs that influence the design of the Python programming language. [1] Python code that aligns with these principles is often referred to as "Pythonic". [2] Software engineer Tim Peters wrote this set of principles and posted it on the Python mailing list in ...
Text replacement (disambiguation) String replacement; Replacement character, a replacement, a substitute character replacing a missing from available fonts; Replace (command), a command used on DOS, Microsoft Windows and related operating systems
For example, in Python, raw strings are preceded by an r or R – compare 'C:\\Windows' with r'C:\Windows' (though, a Python raw string cannot end in an odd number of backslashes). Python 2 also distinguishes two types of strings: 8-bit ASCII ("bytes") strings (the default), explicitly indicated with a b or B prefix, and Unicode strings ...
A string homomorphism (often referred to simply as a homomorphism in formal language theory) is a string substitution such that each character is replaced by a single string. That is, f ( a ) = s {\displaystyle f(a)=s} , where s {\displaystyle s} is a string, for each character a {\displaystyle a} .