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A line break in the wikimarkup of a list item will end not just the item but the entire list, and reset the counter on ordered lists. Separating unordered list items with blank lines may look approximately normal on-screen, but it creates many separate one-item lists, which is a problem for people using screen readers and is discouraged by the ...
A list may contain the same value more than once, and each occurrence is considered a distinct item. A singly-linked list structure, implementing a list with three integer elements. The term list is also used for several concrete data structures that can be used to implement abstract lists, especially linked lists and arrays.
Lists present similar information in bulleted, enumerated, or definition format. Lists may be embedded in articles or may be stand-alone articles. Lists should have a self-explanatory title, and a lead-in description with further explanation as required. Lists, categories, and navigation templates are synergistic.
The HTML output of this is a trainwreck, especially for visually impaired users of screen-reader software, who are told, in series, that: an unordered list of one item has started; that list has ended; a description list with no term but one unassigned definition has started; that list ended; another unordered list of one item started, and ...
Lists made with bullets are called bulleted lists. The HTML element name for a bulleted list is " unordered list ", because the list items are not arranged in numerical order (as they would be in a numbered list ).
In an unordered list, one simple heuristic for decreasing average search time is the move-to-front heuristic, which simply moves an element to the beginning of the list once it is found. This scheme, handy for creating simple caches, ensures that the most recently used items are also the quickest to find again.
A description list (a.k.a. association list or definition list) consists of name–value groups, [21] and was known as a definition list prior to HTML5. [22] Description lists are intended for groups of "terms and definitions, metadata topics and values, questions and answers, or any other groups of name–value data". [23]
In contrast, the unordered pair, denoted {a, b}, always equals the unordered pair {b, a}. Ordered pairs are also called 2-tuples, or sequences (sometimes, lists in a computer science context) of length 2. Ordered pairs of scalars are sometimes called 2-dimensional vectors.