Docker's the most important commands for everyday use.
6 functions of dplyr package.
A Web Service is a software application identified by a URI (Uniform Resource Identifier) whose interfaces and binding are capable of being defined, described and discovered by XML artifacts and [that] supports direct interactions with other software applications using XML based messages via Internet-based protocols (HTTP, HTTPS, SMTP).
AOP aims at reducing the amount of "tangled" code by which we mean code that might be implemented in different classes if a OOP language is used but still share important secondary requirements. Such requirements are said to cross-cut the system's basic functionality and are difficult to develop and maintain using non-AOP programming paradigms. Cross-cutting functionality can be thought of as functionalty spanning many objects.
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