let vs. var vs. const in JavaScript
In JavaScript, we can create a variable using three keywords: let var const What is Scope? Scope is the accessibility during runtime of variables, fun...
What is a pass statement in Python?
A pass statement is an empty/null statement that is considered as a placeholder for future code. When a user doesn’t want to write a code, or is not a...
What are shallow and deep copies?
Shallow copy In a shallow copy , the references of an object are copied in another object when we copy the object. The referenced object itself is not...
What is a uniform cost search algorithm?
Search algorithms are used to resolve search problems. For example, search for the shortest path between two given points, searching for a goal, and s...
uniform cost search
ucs
algorithm
How to check for Palindrome numbers in Java
A palindrome number is a number that has the same value as that of the original number when reversed, e.g., 121, 111, 1223221. If you were to reverse ...
How to setup AWS VPC
AWS virtual private cloud (VPC) is a service provided by AWS that allows you to create and manage your virtual network infrastructure within the AWS c...
aws
vpc
virtual private cloud
amazon
cloud
Deep copying vs. shallow copying
Let’s take two objects of the same type (A and B) where the contents of A are to be copied into B. Let’s see how this copying will take place in the c...
What is an arrow function in JavaScript?
Arrow function or an arrow function expression is a more concise syntax for writing regular function expressions that allow us to write shorter and n...
Deep learning
Deep learning is a subset of machine learning that involves using artificial neural networks to imitate the structure and the function of a human brai...
machine learning
ai
artific
data science
Vue vs. React
React is a JavaScript UI framework created by Facebook and made open source in May 2013. React is significantly more popular than Vue; at the time of ...
How to implement routing in Next JS
Key takeaways: Routing in Next.js is implemented using the Pages Router, which is based on the pages directory. Each file within this directory corres...
What are named arguments in PHP?
PHP is excellent for generating dynamic web pages and apps. PHP scripts are executed on the server to generate HTML content, which is then delivered t...
What are data types in TypeScript?
Definition A data type holds information about the type of data stored in a variable, e.g., number , string , boolean , etc. Syntax To provide a data ...
How to do routing in express
Routing determines how an application refers to client requests at a particular endpoint - URI (path) and HTTP request method. Each route can have one...
How to determine if two trees are identical
Problem statement Given the roots of two binary trees, determine whether or not two binary trees are identical. Identical trees have the same structur...
What is is_lower(c) in Fortran?
is_lower(c) is a public pure function in the stdlib_ascii module: this module provides methods to manipulate and handle intrinsic character variables ...
What is the Long.signum function in Java?
The static signum function of the Long class is used to get the signum function of the specified long value. The signum denotes the sign of a real num...
What is multiplyExact(x: Long, y: Long) in Scala?
multiplyExact(x: Long, y: Long) is a function in the math package of Scala. The function returns the product of the numbers passed in as arguments. Sy...
How to convert an integer into a Roman numeral
Key takeaways: Roman numerals use Latin letters to represent numbers, combining both additive and subtractive principles. Key values include I (1) , V...
How to use ferror() in C++
In C++ , we can use the ferror() function to check for errors in the input file stream. It returns a non-zero value if the error indicator is set. Syn...