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Purpose[ edit ] Just as a graphical user interface GUI makes it easier for people to use programs, application programming interfaces make it easier for developers to use certain technologies in building applications. An API simplifies programming by abstracting the underlying implementation and only exposing objects or actions the developer needs.
The API describes and prescribes the "expected behavior" a specification while the library is an "actual implementation" of this set of rules.
A single API can have multiple implementations or none, being abstract in the form of different libraries that share the same programming interface. The separation of the API from its implementation can allow programs written in one language to use a library written in another.
An API for a procedural language such as Lua could consist primarily of basic routines to execute code, manipulate data or handle errors while an API for an object-oriented languagesuch as Java, would provide a specification of classes and its class methods. By mapping the features and capabilities of one language to an interface implemented in another language, a language binding allows a library or service written in one language to be used when developing in another language.
Moreover, the overall program flow of control can be out of the control of the caller and in the hands of the framework by inversion of control or a similar mechanism. For example, the Java Database Connectivity API allows developers to query many different types of databases with the same set of functions, while the Java remote method invocation API uses the Java Remote Method Protocol to allow invocation of functions that operate remotely, but appear local to the developer.
A modification on the proxy object also will result in a corresponding modification on the remote object. An API approach is an architectural approach that revolves around providing a program interface to a set of services to different applications serving different types of consumers.
An example might be a shipping company API that can be added to an eCommerce-focused website to facilitate ordering shipping services and automatically include current shipping rates, without the site developer having to enter the shipper's rate table into a web database.
While "web API" historically virtually has been synonymous for web servicethe recent trend so-called Web 2.
In this way, content that is created in one place dynamically can be posted and updated to multiple locations on the web. Those that provide and use APIs are considered as being members of a business ecosystem.
The API is for internal company use only. Only specific business partners can use the API. For example, car service companies such as Uber and Lyft allow approved third-party developers to directly order rides from within their apps.
This allows the companies to exercise quality control by curating which apps have access to the API, and provides them with an additional revenue stream.
The API is available for use by the public. Changes by a developer to a part of it—for example adding new parameters to a function call—could break compatibility with clients that depend on that API.
For example, in the Google Guava library, the parts that are considered unstable, and that might change in the near future, are marked with the Java annotation Beta. This usually means that part of the API should be considered a candidate for being removed, or modified in a backward incompatible way.
Therefore, these changes allows developers to transition away from parts of the API that will be removed or not supported in the future.User Interfaces Essay Sample.
Menu Interface. This type of interface lets you interact with a computer or device by working your way through a series of screens or menus.
Mission Control Center, Houston, [We know what rocket science looks like in the movies: a windowless bunker filled with blinking consoles, swivel chairs, and shirt-sleeved men in headsets nonchalantly relaying updates from “Houston” to outer space.
User Interface Design from University of Minnesota. In this Specialization, you will learn industry-standard theory and methods for developing successful user interfaces (UIs).
Upon completing this Specialization, you will have fluency with the. by Stefan Werning.
Introduction. The notion of home as a place to return to has been particularly prominent (e.g. in popular culture) at times of ‘abrupt change either within the social or physical environment or in the world of ideas’. Abrupt change and concurrent sentiments such as disorientation and arbitrariness are not limited to material contexts but also apply characteristically to.
by MARTIN FOYS In some kind of invented ideality, we'd all be friends. If we could all be friends of Facebook, that'd be one weird realization of the semantic web utopia, or more accurately, heterotopia.
Designing and building a robust data access layer. Building an understanding of architectural concepts is an essential aspect of managing your career.