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  2. MX record - Wikipedia

    en.wikipedia.org/wiki/MX_record

    The characteristic payload information of an MX record [1] is a preference value (above labelled "Priority"), and the domain name of a mailserver ("Host" above).. The priority field identifies which mailserver should be preferred - in this case the values are both 10, so mail would be expected to flow evenly to both onemail.example.com and twomail.example.com - a common configuration.

  3. List of DNS record types - Wikipedia

    en.wikipedia.org/wiki/List_of_DNS_record_types

    Allows regular-expression-based rewriting of domain names which can then be used as URIs, further domain names to lookups, etc. NS 2 RFC 1035 [1] Name server record

  4. Index mapping - Wikipedia

    en.wikipedia.org/wiki/Index_mapping

    Index mapping (or direct addressing, or a trivial hash function) in computer science describes using an array, in which each position corresponds to a key in the universe of possible values. [1] The technique is most effective when the universe of keys is reasonably small, such that allocating an array with one position for every possible key ...

  5. Value semantics - Wikipedia

    en.wikipedia.org/wiki/Value_semantics

    In computer science, having value semantics (also value-type semantics or copy-by-value semantics) means for an object that only its value counts, not its identity. [1] [2] Immutable objects have value semantics trivially, [3] and in the presence of mutation, an object with value semantics can only be uniquely-referenced at any point in a program.

  6. Search engine indexing - Wikipedia

    en.wikipedia.org/wiki/Search_engine_indexing

    The forward index is sorted to transform it to an inverted index. The forward index is essentially a list of pairs consisting of a document and a word, collated by the document. Converting the forward index to an inverted index is only a matter of sorting the pairs by the words. In this regard, the inverted index is a word-sorted forward index.

  7. Raising and lowering indices - Wikipedia

    en.wikipedia.org/wiki/Raising_and_lowering_indices

    For a (0,2) tensor, [1] twice contracting with the inverse metric tensor and contracting in different indices raises each index: =. Similarly, twice contracting with the metric tensor and contracting in different indices lowers each index:

  8. Indexed color - Wikipedia

    en.wikipedia.org/wiki/Indexed_color

    A 2-bit indexed color image. The color of each pixel is represented by a number; each number (the index) corresponds to a color in the color table (the palette).. In computing, indexed color is a technique to manage digital images' colors in a limited fashion, in order to save computer memory and file storage, while speeding up display refresh and file transfers.

  9. Recode (disambiguation) - Wikipedia

    en.wikipedia.org/wiki/Recode_(disambiguation)

    Recode is a technology news website. Recode or recoding may also refer to: Recode (database), a biological database; Recode, an act or product of transcoding a digital bitstream; Recoding (biology), the process of genetic translation; Recode (non-profit organization)