In JavaScript, the typeof operator allows you to easily get the specified variable type. This operator is essential in JavaScript as a variable is dynamically typed. By using typeof, you can use JavaScript to return the data type as a string. You can then use this string to check whether...
Reading how an operator works Throughout this book, you will see a lot of diagrams explaining how an operator works. These diagrams are a graphical representation of observables and operations in those observables. Usually, the diagrams consist of three parts. On the top they shows a line wit...
Different types of Advance Functions in JavaScript What are the Functions in JavaScript? Unlike other programming languages,JavaScript functions are objects. In other words, it is an instance of theFunctiontype. Consequently, it has properties and methods like other objects. Also, the name of a fu...
Although a high-level understanding of mathematics is not a prerequisite to being a capable developer, it is important to know what types of operations are available in JavaScript, and how to use math as a tool to accomplish practical tasks. Unlike other programming languages, JavaScript only has...
This tutorial covered how JavaScript handles conversion of its primitive data types. Though due to type coercion, data types will implicitly convert in many cases, it is a good habit to explicitly convert data types in order to ensure that programs are functioning as expected. ...
Provide default values using the OR operator (||) or nullish coalescing operator (??) Let’s go through an example. “TypeError: Cannot Read Property of Undefined” Example Here’s an example of a JavaScriptTypeError: Cannot read property of undefinedthrown when a property is attempted to be...
Many things are objects in javascript. To know if a value is an object that can have properties and be looped through, its constructor can be compared to Object. It doesn't work for objects created from classes, then the instanceof operator can be used instead. ...
Convert Float to Int Using Math Library Functions in JavaScript Conclusion In JavaScript, we have many ways of converting float to int, as shown below. The parseInt() function The Number.toFixed() method Conversion with bitwise operators Applying OR by 0 Using the double NOT operator Right...
passwords/IDs. It’s therefore important to always ensure that any variables being manipulated as part of this process are encrypted first before manipulation takes place just in case. Additionally, it’s also important to bear in mind that depending on how many components are being combined withi...
In this example, thesumfunction uses the spread operator to destructure the array of numbers into individual arguments, which are then used to calculate the sum. Many functions and methods accept variable arguments. For example, theMath.maxmethod yields the largest of its arguments, no matter ho...