Learn how to use Node.js to get the last updated date of a file. The fs module in Node.js provides all the necessary file functions. One of these functions is statSync(), which allows us to get file details synchronously. To retrieve the last updated date of a file, simply call statSync() and pass in the file path (either relative or absolute). It will return an object that contains the mtime property....
In this tutorial, we will learn how to obtain the names of all the files in a specific folder using Node.js. This can be achieved by utilizing the built-in fs module provided by Node.js. To get started, you need to have the fs module available. Node.js comes with this module by default, so there is no need to install it separately. Listing Files in a Folder The following code snippet demonstrates how to list all the files and folders contained within a specified directory in the filesystem:...
Learn how to retrieve the result of an asynchronous function, whether it is promise-based or callback-based, using JavaScript. Imagine you encounter this scenario: you need to return the result of an asynchronous call from the original function. Here is a simplified example: const mainFunction = () => { const result = asynchronousFunction(); return result; } However, asynchronousFunction() performs an asynchronous operation, such as a fetch() call, and cannot directly return the result value....
If you are looking to obtain the value of a CSS property in a web page that is set using a stylesheet, you may be wondering how to achieve this using JavaScript. The style property of an element will not suffice since it only returns CSS properties defined inline or dynamically, and not those defined in an external stylesheet. Thankfully, there is a solution: the getComputedStyle() function. This global function allows you to retrieve the computed style of an element, including properties defined in stylesheets....
When working with forms in React, it is often necessary to obtain the value of a specific form field. This can be helpful, for instance, when a user clicks a button and you need to access the input data. In this article, we will explore how to retrieve the value of an input element in React. To achieve this, we can make use of React hooks. Hooks allow us to manage state in functional components....
When working with an array of objects in JavaScript, there may be times when you need to extract the unique values of a specific property from these objects. This can be achieved by utilizing the set of built-in JavaScript functions and operators. Let’s take a look at an example to better understand how this can be done. Suppose we have an array called bills, which contains several objects representing different bills, each with properties such as date, amount, and category....
In this blog post, we will explore how to return a string from a C function. Returning a string in C can be a bit tricky because strings are actually arrays of char elements. Instead of directly returning the string itself, we need to return a pointer to the first element of the string. To accomplish this, we use the const char* data type. Here’s an example of a function that returns a string:...
In React, when writing JSX, there is a limitation: you can only return one parent item. You cannot have multiple elements directly under the return statement. However, there are several solutions to overcome this limitation. Solution 1: Wrap Components and Elements in a <div> One common way to solve this issue is by wrapping the components and other HTML elements in a <div>: const Pets = () => { return ( <div> <Dog /> <Cat /> </div> ); }; However, this approach introduces an additional HTML element which may not be necessary in the final rendered HTML....
Functions in JavaScript can only return a single value using the return statement. So, how can we simulate returning multiple values from a function? When we have the need to return multiple values, we can utilize a couple of tricks to achieve this. Option 1: Returning an Array One simple approach is to return an array from the function: const getDetails = () => { return [37, 'Flavio']; }; To access the returned values, we can use array destructuring:...
Reversing a JavaScript array can be done using a few different methods. In this article, we will explore the different ways to achieve this. Let’s start with an example array called list: const list = [1, 2, 3, 4, 5]; The easiest and most intuitive way to reverse an array is by using the built-in reverse() method. This method directly alters the original array, so you can call it directly on list:...