Handshake Puzzle
What is the number of people who attended a party where every person shook hands with every other person if the total number of handshakes… Read More »Handshake Puzzle
JavaScript is null or empty
In JavaScript, “null” and “empty” are two different concepts. “Null” is a special value that represents the intentional absence of any object value, while “empty”… Read More »JavaScript is null or empty
JavaScript check if variable has value
To check if a variable has a value in JavaScript, you can use a conditional statement such as an if statement to check if the… Read More »JavaScript check if variable has value
JavaScript slice vs splice
JavaScript’s slice() and splice() methods operate on arrays but have different functionalities. Understanding the differences between these methods is crucial for effective array manipulation in… Read More »JavaScript slice vs splice
JavaScript RegExp test() Method
The test () method in JavaScript’s regular expression (RegExp) object searches a specified string for a match with a given regular expression. If a match… Read More »JavaScript RegExp test() Method
JavaScript check if string is empty or whitespace
Learn how to check if a string is empty or contains only whitespace characters in JavaScript. Explore two different approaches: using a regular expression and… Read More »JavaScript check if string is empty or whitespace
3 Glasses and 10 Coins Puzzle
The 3 glasses and 10 coins puzzle is a classic logic puzzle that goes like this: You have three glasses on a table. The first… Read More »3 Glasses and 10 Coins Puzzle
Black and White Hats Puzzle
This is a classic puzzle known as the “Black and White Hats” puzzle. The solution involves the students devising a strategy beforehand to maximize the… Read More »Black and White Hats Puzzle
Reference data types in JavaScript
Reference data types in JavaScript are objects that are not primitive data types but are stored in memory as a reference to their location, rather… Read More »Reference data types in JavaScript
Primitive value in JavaScript
In JavaScript, a primitive value is a basic data type that is not an object and has no methods or properties. There are six primitive… Read More »Primitive value in JavaScript