OpenGenus Tech Review Team

Algorithms

Find n-th Fibonacci number using Dynamic Programming

In this article, we have explored a dynamic programming approach to find the n th fibonacci number followed by a space optimized technique.

Software Engineering

Understand RESTful API design with Twitter API as an example

In this article, we have explored the basic ideas behind Restful API along with its five principles and illustrate it with an example of Twitter API.

Software Engineering

Middlewares in Express along with Request Response Cycle

In this article, we learn about the request-response cycle in Express and move on to the concept of middlewares.

Software Engineering

Learn Routing with Express and Postman

We will learn about routing in web applications using Express which is a Node.js framework and Postman which will allow us to do API testing.

Software Engineering

Function Pointer in C

Function pointer in C is a concept where a pointer variable can point to the memory address of a function.

Software Engineering

Initialize Stack in C++ STL

std::stack is a type of container adapter, specifically designed to operate in a LIFO fashion elements can be inserted or removed from only one end

Machine Learning (ML)

Document Clustering using K Means

In this article, we use ideas from TF IDF and similarity metrics to use K Means clustering algorithm to cluster documents.

Natural Language Processing (NLP)

Find similarity between documents using TF IDF

We will follow NLP techniques like TF IDF to achieve document similarity in this article. Did you know that even today 4 out of 5 systems use NLP techniques to deal with document similarity?

Software Engineering

Learn to use Queue in Java Collections Framework

In this article, we will take a look at how to use the Queue class in Java Collections library. This is useful as one can directly use queue without natively implementing it

Software Engineering

What is Blockchain?

Blockchain is an emerging technology that can radically improve banking, supply chain, and other transaction networks and can create new opportunities for innovation. Businesses contain many examples of networks of individuals and organizations that collaborate to create value and wealth.

Software Engineering

What is Content Security Policy (CSP)?

Content Security Policy (CSP) is an added layer of security that helps to detect and mitigate certain types of attacks, including Cross Site Scripting (XSS) and data injection attacks

Data Structures

Persistent Segment Tree

Our aim is to introduce persistency in segment trees but also ensure that the space and time complexity is not affected.

Software Engineering

Pass array in function in C in multiple ways

In this article, we explored how to pass 1D and 2D array as a function parameter. Arguments are passed by value or reference in general

Software Engineering

Learn Decorators in Python with examples

Decorators allows modifying the behavior of function or class. We wrap another function to extend the functionality of the wrapped function

Algorithms

Solving Unbounded Knapsack Problem using Dynamic Programming

Restriction of limited items is removed in Unbounded Knapsack Problem. An item can be used infinite times and can be solved efficiently using Dynamic Programming.

Machine Learning (ML)

Face detection as done in 2001: Viola Jones Algorithm

Viola Jones algorithm is one face detection algorithm which was in use back in 2001 when such applications where not so cool

Software Engineering

Understanding storageSession in HTML with an example

sessionStorage property is used to access a session Storage object for the current origin URL. It works similar to localStorage

Machine Learning (ML)

Ensemble methods in Machine Learning: Bagging, Boosting and Stacking

We will see what an ensemble method is, why they are trendy, and what are the different types of ensemble methods and how to implement these methods using scikit-learn and mlxtend in Python.

Software Engineering

Understand Switch case in C

In C, switch statement compares the value of an expression or variable against a list of case values and when a match is found the block of statements associated with that case is executed.

Software Engineering

Metadata: Give your webpages the information it needs

The tag provides information about a webpage. This metadata is not displayed on the webpage but is machine parse-able.

Software Engineering

Viewport: Adjust your webpage size according to user's device

Viewport is the area of a web page which is visible to the user. It is not fixed in size, and varies with the size of the screen of different devices.

Software Engineering

Exception handling in C++

C++ provides several ways to handle exceptions. We can do so by handling exceptions using custom code with try, catch and throw keywords. C++ provides custom exceptions (predefined) which we can use and it has std::cerr which is a stream for error outputs

Software Engineering

Sorting in C++ using std::sort()

With Standard template library available in C++, many functions are easier to implement. One of them present is sort function as well which we are going to discuss.

Software Engineering

Learn about Descriptors in Python

Python descriptor protocol is simply a way to specify what happens when an attribute is referenced on a model.

Software Engineering

Learn everything about variables in C

In this article, we will take a look into variables of different data types in C, how to get memory address and pointer to a variable and others.