Discover an easy way to determine if a Date object represents the current date and time. To determine if a JavaScript Date object instance represents the current date, you can compare the day, month, and year of the date to the current day, month, and year. This can be achieved using the getDate(), getMonth(), and getFullYear() methods of the Date object. The current date can be obtained by using new Date()....
In JavaScript, there are multiple ways to check if a variable value is a number. Let’s explore two common approaches. Method 1: Using isNaN() Function JavaScript provides a global function called isNaN() that can be used to check if a value is a number. This function is assigned to the window object in the browser environment. Here’s an example: const value = 2; isNaN(value); // returns false isNaN('test'); // returns true isNaN({}); // returns true isNaN(1....
In Python, there are a couple of approaches you can take to check whether a variable is a string. The two common methods involve using the type() function and the isinstance() function. Method 1: Using the type() Function To determine if a variable is a string using the type() function, follow these steps: name = "Roger" if type(name) == str: print("The variable is a string.") else: print("The variable is not a string....
Determining the length of an array in C can be a bit tricky since C does not provide a built-in way to do it. However, there are a few approaches you can take to get the desired result. First, let’s discuss the simplest way to determine the length of an array: saving the length in a variable. This method involves defining a variable and using it to specify the size of the array....
In JavaScript, there are various built-in types such as numbers, strings, booleans, and objects. You might often encounter situations where you need to determine the type of a value. Fortunately, JavaScript provides us with the typeof operator to accomplish this task. To use the typeof operator, simply write the keyword typeof followed by the value or variable you want to check. Let’s take a closer look at how this works:...
When working with TypeScript, you may encounter an error message stating that a variable is declared but its value is never read. This error message is triggered when you declare a variable but do not use it anywhere in your code. While this error message helps catch potential issues, there are situations where you may want to disable this check temporarily. Here’s how you can turn off the ‘declared but its value is never read’ check in TypeScript:...
Learn how to programmatically disable or enable a button using JavaScript. An HTML button is one of the few elements that has its own state, along with almost all the form controls. There are many scenarios where it is necessary to disable or enable a button using JavaScript. For instance, you may want to enable the button only when a text input element is filled, or when a specific checkbox is clicked (e....
In this tutorial, we will discuss how to disable specific ESLint rules in your code. Sometimes, your tooling may automatically set certain ESLint rules, such as the no-debugger and no-console rules. While these rules may be useful for production code, they can be restrictive during development when you need to access the browser debugger and the Console API. To disable these rules, you have several options: Disabling Rules for a Whole File To disable one or more specific ESLint rules for an entire file, you can add the following comment at the top of the file:...
Learn how to disable text selection on your webpage using the CSS property user-select to create a more app-like experience. By default, browsers allow users to select text on webpages using keyboard commands or the mouse. However, if you want to prevent text selection and make your webpage feel more like an application, you can utilize the user-select: none; CSS rule. To ensure cross-browser compatibility, you should use browser prefixes. According to Can I Use, the following prefixes are required:...
In the process of working on long-term projects with Git, it’s not uncommon to encounter regression bugs caused by unrelated changes in the code. To solve this problem, it is important to determine where the bug is and identify which commit introduced the issue. Git provides a useful command called bisect to automate this process and make bug discovery easier. To begin, you can manually check out specific commits to narrow down the problematic code....