Computer Science

Dependency Inversion and Inversion of Control

Dependency Inversion

The Dependency Inversion Principle states that:

  1. High level modules should not depend upon low level modules. Both should depend upon abstractions.
  2. Abstractions should not depend upon details. Details should depend upon abstractions.

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Thread Synchronization

  • Java

When we start two or more threads within a program, there may be a situation when multiple threads try to access the same resource and finally they can produce unforeseen result due to concurrency issue. For example if multiple threads try to write within a same file then they may corrupt the data because one of the threads can overrite data or while one thread is opening the same file at the same time another thread might be closing the same file.

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Standard Diagrams (UML)

UML – The Unified Modeling Language (UML) is a general-purpose, developmental, modeling language in the field of software engineering, that is intended to provide a standard way to visualize the design of a system.

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Git basic commands Cheat Sheet

  • Software
Git basic commands

Git is a powerful system for distributed version control.

Read more: Git basic commands Cheat Sheet

Design Patterns (Java)

The design patterns are strategies for solving common object-oriented design problems. Using the design patterns you can make your code more flexible, reusable and maintainable. We must use the design patterns during the analysis and requirement phase of SDLC (Software Development Life Cycle).

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Aspect-Oriented Programming

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.

Read more: Aspect-Oriented Programming

dplyr - package for common data manipulation operations in R

dplyr - package for data manipulation

6 functions of dplyr package.

Read more: dplyr - package for common data...

  1. Java API for operations on set of objects
  2. Regular Expression basics. Metacharacters.
  3. Docker basic commands cheat sheet

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