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React.js is the most popular front-end JavaScript library for building Web applications. React.js or Reactjs or simply React are different ways to represent React.js. Most fortune 500 companies use Reactjs  In this article, we will learn what React.js (or simply React or Reactjs) is and why we should use Reactjs instead of other JavaScript frameworks like Angular. 
What is React.js?
React.js is an open-source JavaScript library that is used for building user interfaces specifically for single-page applications. Itโ€™s used for handling the view layer for web and mobile apps. React also allows us to create reusable UI components. React was first created by Jordan Walke, a software engineer working for Facebook. React first deployed on Facebookโ€™s newsfeed in 2011 and on Instagram.com in 2012.
JSX
In React, instead of using regular JavaScript for templating, it uses JSX. JSX is a simple JavaScript that allows HTML quoting and uses these HTML tag syntax to render subcomponents. HTML syntax is processed into JavaScript calls of React Framework. We can also write in pure old JavaScript. @pantechelearning
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A code editor is a tool that is used to write and edit code. They are usually lightweight and can be great for learning. However, once your program gets larger, you need to test and debug your code, that's where IDEs come in.
An IDE (Integrated Development Environment) understand your code much better than a text editor. It usually provides features such as build automation, code linting, testing and debugging. This can significantly speed up your work. The downside is that IDEs can be complicated to use.
***PyCharm combines all the Python tools in one place. It offers:
an intelligent code editor,
navigation and refactoring tools,
a debugger,
a test runner.
It also allows code inspections and supports VCS. PyCharmโ€™s code inspection is one of the most advanced among all Python IDEs, making it much harder to introduce preventable bugs through static and runtime code analysis.
The paid version additionally offers:
a Python profiler;
remote development;
database tools;
*****Visual Studio Code is a complete code editor developed by Microsoft. While it has many premium features and is customizable, it has a clear and easy UX, and installing new extensions is beyond easy.
Visual Studio Code provides:
syntax highlighting,
bracket-matching,
auto-indentation,
box-selection,
built-in support for IntelliSense code completion,
rich semantic code understanding and navigation,
code refactoring tools,
a debugger. 
Sublime Text 3 (ST3) is a lightweight, cross-platform code editor known for its speed, ease of use, and strong community support. It's an incredible editor right out of the box, but the real power comes from the ability to enhance its functionality using Package Control and creating custom settings.
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Why Is Python Programming Considered the Top Language?

The list of programming languages is so massive that itโ€™s natural for people to have widely different opinions about which one is โ€œthe best oneโ€. Obviously, it all depends on the project at hand, so to claim a language as superior to all the rest feels weird. Yet, that doesnโ€™t mean that there arenโ€™t programming languages that are universally revered and favored. Among them, Python might be the most popular one.
Python is undoubtedly considered a top programming language at the same level as JavaScript or C++, and itโ€™s one of the most used languages by businesses and enterprises. Even though itโ€™s almost 30 years old, Python is still relevant, given its ease of use, its vibrant community, and many applications. Those characteristics should be enough to support the claim as a top programming language, but letโ€™s dive a little more into it to understand Pythonโ€™s value truly. @pantechelearning
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Pandas is a Python library used for working with data sets. It has functions for analyzing, cleaning, exploring, and manipulating data. The name "Pandas" has a reference to both "Panel Data", and "Python Data Analysis" and was created by Wes McKinney in 2008.
Pandas has been one of the most popular and favourite data science tools used in Python programming language for data wrangling and analysis. Data is unavoidably messy in real world. And Pandas is seriously a game changer when it comes to cleaning, transforming, manipulating and analyzing data.
It provides high-performance, easy to use structures and data analysis tools. Unlike NumPy library which provides objects for multi-dimensional arrays, Pandas provides in-memory 2d table object called Dataframe.
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SQL JOINS.
A SQL Join statement is used to combine data or rows from two or more tables based on a common field between them. Different types of Joins are:

INNER JOIN

LEFT JOIN

RIGHT JOIN

FULL JOIN

INNER JOIN: The INNER JOIN keyword selects all rows from both the tables as long as the condition satisfies. 
LEFT JOIN: This join returns all the rows of the table on the left side of the join and matching rows for the table on the right side of join.
RIGHT JOIN: RIGHT JOIN is similar to LEFT JOIN. This join returns all the rows of the table on the right side of the join and matching rows for the table on the left side of join. 
FULL JOIN: FULL JOIN creates the result-set by combining result of both LEFT JOIN and RIGHT JOIN. The result-set will contain all the rows from both the tables. 
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
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Syntax of while loop
while( expression)
{
Body of the loop
}
The while statement will be executed repeatedly until as the expression remains true.
*Working condition*
In while loop, a condition is evaluated before processing a body of the loop. If a condition is true then and only then the body of a loop is executed. ... Once the condition becomes false, the control goes out of the loop. After exiting the loop, the control goes to the statements which are immediately after the loop.
Comment your answer what will be the output for the given code.. Share it with your friends who loves coding and who wants to learn from basics.
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Which one is faster. Tell us in comment
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HTML page using python.
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OOPS Python Interview Questions
*1*Explain Inheritance in Python with an example.

*2*How are classes created in Python? 
*3*What is Polymorphism in Python?

*4*Define encapsulation in Python?

*5*How do you do data abstraction in Python?

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What is Hierarchical Inheritance in Java? ... In Hierarchical Inheritance, the multiple child classes inherit the single class or the single class is inherited by multiple child class. The use of inheritance in Java is for the reusability of code and for the dynamic polymorphism (method overriding).
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Difference between c, c++ and java?
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Exception handling?
The Exception Handling in Java is one of the powerful mechanism to handle the runtime errors so that normal flow of the application can be maintained.
Java exception handling is managed via five keywords: try, catch, throw, throws, and finally. 
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7 layers of OSI reference model.
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Difference between java and javascript.
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Features of javascript
Javascript Features

Light Weight Scripting language.

Dynamic Typing.

Object-oriented programming support.

Functional Style.

Platform Independent.

Prototype-based.

Interpreted Language.

Async Processing.

Client-Side Validation

More control in the browser
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Advantages of javascript?
JavaScript is a dynamic computer programming language. It is lightweight and most commonly used as a part of the web pages, whose implementation allows a client-side script to interact with a user and to make dynamic pages. It is an interpreted programming language with object-oriented capabilities.
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What is a trigger with an example
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