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  2. Thompson's construction - Wikipedia

    en.wikipedia.org/wiki/Thompson's_construction

    Let c be the number of concatenation of the regular expression E and let s be the number of symbols apart from parentheses — that is, |, *, a and ε. Then, the number of states of A is 2s − c (linear in the size of E). The number of transitions leaving any state is at most two.

  3. JSFuck - Wikipedia

    en.wikipedia.org/wiki/JSFuck

    Other tricks are needed to produce other letters – for example by casting the string 1e1000 into a number, which gives Infinity, which in turn makes the letter y accessible. [ 13 ] The following is a list of primitive values used as building blocks to produce the most simple letters.

  4. Glushkov's construction algorithm - Wikipedia

    en.wikipedia.org/wiki/Glushkov's_construction...

    Glushkov's algorithm can be used to transform it into an NFA, which furthermore is small by nature, as the number of its states equals the number of symbols of the regular expression, plus one. Subsequently, the NFA can be made deterministic by the powerset construction and then be minimized to get an optimal automaton corresponding to the ...

  5. Substitution cipher - Wikipedia

    en.wikipedia.org/wiki/Substitution_cipher

    Named after the public official who announced the titles of visiting dignitaries, this cipher uses a small code sheet containing letter, syllable and word substitution tables, sometimes homophonic, that typically converted symbols into numbers. Originally the code portion was restricted to the names of important people, hence the name of the ...

  6. Numeric character reference - Wikipedia

    en.wikipedia.org/wiki/Numeric_character_reference

    As another example, if some text was created originally using the MacRoman character set, the left double quotation mark “ will be represented with code point xD2. This will not display properly in a system expecting a document encoded as UTF-8, ISO 8859-1, or CP-1252, where this code point is occupied by the letter Ò .

  7. List of XML and HTML character entity references - Wikipedia

    en.wikipedia.org/wiki/List_of_XML_and_HTML...

    where the x must be lowercase in XML documents, hhhh is the code point in hexadecimal form, and nnnn is the code point in decimal form. The hhhh (or nnnn) may be any number of hexadecimal (or decimal) digits and may include leading zeros. The hhhh for hexadecimal digits may mix uppercase and lowercase letters, though uppercase is the usual ...

  8. Arithmetic coding - Wikipedia

    en.wikipedia.org/wiki/Arithmetic_coding

    Furthermore, we assume that the recursion depth is known in each step. In step one we code "B" which is inside the interval [0.5, 0.83): The binary number "0.10x" is the shortest code that represents an interval that is entirely inside [0.5, 0.83). "x" means an arbitrary bit sequence.

  9. Construct (Python library) - Wikipedia

    en.wikipedia.org/wiki/Construct_(Python_library)

    Construct is a Python library for the construction and deconstruction of data structures in a declarative fashion. In this context, construction, or building, refers to the process of converting (serializing) a programmatic object into a binary representation.