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  2. Help:Empty pages - Wikipedia

    en.wikipedia.org/wiki/Help:Empty_pages

    This is done by having it call another template, of which the name is a parameter; one version of the other template contains the additional text, the other version is blank. See optional text. However when creating a new page MediaWiki will not save an empty page, or one with only whitespace. Instead you must first create a non-empty page, e.g ...

  3. ISO 216 - Wikipedia

    en.wikipedia.org/wiki/ISO_216

    Successive paper sizes in the series (A1, A2, A3, etc.) are defined by halving the area of the preceding paper size and rounding down, so that the long side of A(n + 1) is the same length as the short side of An. Hence, each next size is nearly exactly half the area of the prior size. So, an A1 page can fit two A2 pages inside the same area.

  4. Intentionally blank page - Wikipedia

    en.wikipedia.org/wiki/Intentionally_blank_page

    Intentionally blank pages are usually the result of printing conventions and techniques. Chapters conventionally start on an odd-numbered page ; therefore, if the preceding chapter happens to have an odd number of pages, a blank page is inserted at the end. Book pages are often printed on large sheets because of technical and financial ...

  5. Binary-coded decimal - Wikipedia

    en.wikipedia.org/wiki/Binary-coded_decimal

    This scheme can also be referred to as Simple Binary-Coded Decimal (SBCD) or BCD 8421, and is the most common encoding. [12] Others include the so-called "4221" and "7421" encoding – named after the weighting used for the bits – and "Excess-3". [13]

  6. Regular expression - Wikipedia

    en.wikipedia.org/wiki/Regular_expression

    (empty set) ∅ denoting the set ∅. (empty string) ε denoting the set containing only the "empty" string, which has no characters at all. (literal character) a in Σ denoting the set containing only the character a. Given regular expressions R and S, the following operations over them are defined to produce regular expressions:

  7. Binary search - Wikipedia

    en.wikipedia.org/wiki/Binary_search

    Binary search Visualization of the binary search algorithm where 7 is the target value Class Search algorithm Data structure Array Worst-case performance O (log n) Best-case performance O (1) Average performance O (log n) Worst-case space complexity O (1) Optimal Yes In computer science, binary search, also known as half-interval search, logarithmic search, or binary chop, is a search ...

  8. Wikipedia:List of blank pages - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:List_of_blank_pages

    Blank categories that contain articles might need to be de-orphaned or listed on Wikipedia:Categories for deletion. Consider making a redirect to an existing page. If a page deserves to be made into an article, add any information you can, and then add a stub tag.

  9. Non-breaking space - Wikipedia

    en.wikipedia.org/wiki/Non-breaking_space

    A second common application of non-breaking spaces is in plain text file formats such as SGML, HTML, TeX and LaTeX, whose rendering engines are programmed to treat sequences of whitespace characters (space, newline, tab, form feed, etc.) as if they were a single character (but this behavior can be overridden).