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  2. Universally unique identifier - Wikipedia

    en.wikipedia.org/wiki/Universally_unique_identifier

    A Universally Unique Identifier (UUID) is a 128-bit label used to uniquely identify objects in computer systems. The term Globally Unique Identifier (GUID) is also used, mostly in Microsoft systems. [1] [2] When generated according to the standard methods, UUIDs are, for practical purposes, unique.

  3. Strongly typed identifier - Wikipedia

    en.wikipedia.org/wiki/Strongly_typed_identifier

    A UML class diagram for a strongly typed identifier. A strongly typed identifier is user-defined data type which serves as an identifier or key that is strongly typed.This is a solution to the "primitive obsession" code smell as mentioned by Martin Fowler.

  4. U-form - Wikipedia

    en.wikipedia.org/wiki/U-form

    Navigational databases, Entity and associative entity relationships can be implemented by using a UUID, or multiple UUIDs, as attribute values. The u-form's design goals center around supporting an open, extensible distributed information space, emphasizing the unambiguous identity of data objects and the separation between data storage, data ...

  5. List of HTTP header fields - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_header_fields

    Character sets that are acceptable. Accept-Charset: utf-8: Permanent RFC 9110: Accept-Datetime: Acceptable version in time. Accept-Datetime: Thu, 31 May 2007 20:35:00 GMT: Provisional RFC 7089: Accept-Encoding: List of acceptable encodings. See HTTP compression. Accept-Encoding: gzip, deflate: Permanent RFC 9110: Accept-Language

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

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

    In HTML and XML, a numeric character reference refers to a character by its Universal Coded Character Set/Unicode code point, and uses the format: &#xhhhh;. or &#nnnn; 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.

  7. Magic number (programming) - Wikipedia

    en.wikipedia.org/wiki/Magic_number_(programming)

    where a is an array object, the function randomInt(x) chooses a random integer between 1 and x, inclusive, and swapEntries(i, j) swaps the ith and jth entries in the array. In the preceding example, 52 and 53 are magic numbers, also not clearly related to each other. It is considered better programming style to write the following:

  8. Snowflake ID - Wikipedia

    en.wikipedia.org/wiki/Snowflake_ID

    Twitter uses snowflake IDs for tweets, direct messages, users, lists, and all other objects available over the API. [7] Discord also uses snowflakes, with their epoch set to the first second of the year 2015. [3] Instagram uses a modified version of the format, with 41 bits for a timestamp, 13 bits for a shard ID, and 10 bits for a sequence ...

  9. Base64 - Wikipedia

    en.wikipedia.org/wiki/Base64

    In computer programming, Base64 (also known as tetrasexagesimal) is a group of binary-to-text encoding schemes that transforms binary data into a sequence of printable characters, limited to a set of 64 unique characters. More specifically, the source binary data is taken 6 bits at a time, then this group of 6 bits is mapped to one of 64 unique ...