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  2. Decorator pattern - Wikipedia

    en.wikipedia.org/wiki/Decorator_pattern

    Decorator UML class diagram. The decorator pattern can be used to extend (decorate) the functionality of a certain object statically, or in some cases at run-time, independently of other instances of the same class, provided some groundwork is done at design time.

  3. Graph database - Wikipedia

    en.wikipedia.org/wiki/Graph_database

    Instead of an email address being found by looking up its user's key in the userpk column, the user record contains a pointer that directly refers to the email address record. That is, having selected a user, the pointer can be followed directly to the email records, there is no need to search the email table to find the matching records.

  4. AngularJS - Wikipedia

    en.wikipedia.org/wiki/AngularJS

    AngularDart works on Dart, which is an object-oriented, class defined, single inheritance programming language using C style syntax, that is different from Angular JS (which uses JavaScript) and Angular 2/ Angular 4 (which uses TypeScript). Angular 4 released in March 2017, with the framework's version aligned with the version number of the ...

  5. Web development - Wikipedia

    en.wikipedia.org/wiki/Web_development

    Key-value stores: Key-value stores store data as pairs of keys and values. They are simple and efficient for certain types of operations, like caching. Examples: Redis, DynamoDB. Column-family stores: Column-family stores organize data into columns instead of rows, making them suitable for large-scale distributed systems and

  6. Plain text - Wikipedia

    en.wikipedia.org/wiki/Plain_text

    Text file with portion of The Human Side of Animals by Royal Dixon, displayed by the command cat in an xterm window. In computing, plain text is a loose term for data (e.g. file contents) that represent only characters of readable material but not its graphical representation nor other objects (floating-point numbers, images, etc.).

  7. Antenna diversity - Wikipedia

    en.wikipedia.org/wiki/Antenna_diversity

    Adaptive arrays can be a single antenna with active elements or an array of similar antennas with ability to change their combined radiation pattern as different conditions persist. Active electronically scanned arrays ( AESAs ) manipulate phase shifters and attenuators at the face of each radiating site to provide a near instantaneous scan ...

  8. Q-learning - Wikipedia

    en.wikipedia.org/wiki/Q-learning

    Double Q-learning [23] is an off-policy reinforcement learning algorithm, where a different policy is used for value evaluation than what is used to select the next action. In practice, two separate value functions and are trained in a mutually symmetric fashion using separate experiences. The double Q-learning update step is then as follows:

  9. Cryptographically secure pseudorandom number generator

    en.wikipedia.org/wiki/Cryptographically_secure...

    In the asymptotic setting, a family of deterministic polynomial time computable functions : {,} {,} for some polynomial p, is a pseudorandom number generator (PRNG, or PRG in some references), if it stretches the length of its input (() > for any k), and if its output is computationally indistinguishable from true randomness, i.e. for any probabilistic polynomial time algorithm A, which ...