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Learn all about the codePointAt() method in JavaScript for strings. The codePointAt() method was introduced in ES2015 to handle Unicode characters that cannot be represented by a single 16-bit Unicode unit, but require two instead. Unlike the charCodeAt() method, which retrieves the first and second 16-bit parts separately and then combines them, the codePointAt() method allows you to obtain the entire character with a single call. Let’s take a Chinese character “𠮷” as an example....

The JavaScript substring() method is a useful tool for extracting a portion of a string. Similar to the slice() method, it has some distinct differences that set it apart. Usage and Syntax The syntax of the substring() method is as follows: string.substring(startIndex, endIndex) startIndex is the index at which the extraction should begin (inclusive). endIndex is the index at which the extraction should end (exclusive). Key Differences There are a few key differences between the substring() method and the slice() method:...

When developing with classes in JavaScript, you often come across the super keyword. In this blog post, let’s explore the purpose and usage of super. Let’s start with a simple example. We have a class called Car: class Car { constructor() { console.log('This is a car'); } } The constructor method in a class is special because it is executed when the class is instantiated. For example: const myCar = new Car(); //'This is a car' Now, let’s say we have a class called Tesla that extends the Car class:...

In JavaScript, the switch conditional is a useful alternative to the if/else statement when you have multiple options to choose from. It helps simplify your code and make it easier to read. To use the switch conditional, you start by defining an expression that determines which case to trigger. Here’s the basic syntax: switch(<expression>) { // cases } Each case is defined with the case keyword, followed by a value and a colon....

In JavaScript, the toFixed() method enables you to obtain a string representation of a number in fixed point notation. This method has various applications and allows you to control the precision of the output. Basic Usage To use the toFixed() method, you can call it on a number object and specify the desired number of digits after the decimal point. Here’s an example: new Number(21.2).toFixed(); // Output: "21" In the above code, the toFixed() method is used without any parameters....

The toLocaleString() method in JavaScript is a useful feature that allows you to obtain a string representation of an object. By calling this method on an object instance, you can retrieve a string representation that is based on a specified locale. This method has an optional parameter which allows you to specify the desired locale. When no locale is provided, the method defaults to using the browser’s default locale. If the toLocaleString() method is not overridden for a particular object, it will return the standard “[object Object]” string representation....

In JavaScript, the toLowerCase() method is used to convert the characters in a string to lowercase. This method returns a new string with all the characters converted to lowercase. It is important to note that the original string is not mutated or changed in any way. The toLowerCase() method does not accept any parameters. It simply operates on the string that it is called upon. Here is an example of how to use the toLowerCase() method:...

In JavaScript, the toPrecision() method is used to convert a number to a string representation with a specified precision. This precision determines the number of significant digits in the resulting string. Here are some examples of how the toPrecision() method works: new Number(21.2).toPrecision(0) // Throws an error! The argument must be greater than 0. new Number(21.2).toPrecision(1) // Returns "2e+1" (which is equal to 2 * 10^1, or 20). new Number(21.2).toPrecision(2) // Returns "21"....

In this blog post, we will delve into the JavaScript toString() method specifically designed for objects. By calling this method on an object instance, you can obtain a string representation of that object. However, please note that the default behavior of the toString() method is to return the string “[object Object]” unless otherwise overridden. In other words, if you write person.toString(), it will return [object Object]. Let’s take a look at an example to get a better understanding:...

In the Linux, macOS, and UNIX operating systems, every file has three permissions: read, write, and execute. These permissions are represented by a string of characters when using the ls -al command. Understanding and changing file permissions is important for managing access to files and directories. Let’s dissect the permission string: drwxr-xr-x. The first character represents the type of file: - indicates a normal file d indicates a directory l indicates a link The next three sets of characters represent the permissions for the owner, group, and everyone else, respectively....