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Articles by varma
54 articles
Main thread vs child thread in C#
In C#, every application starts with a main thread that executes the Main method. Additional threads, called child threads, can be created to perform concurrent operations alongside the main thread. Main Thread The main thread is automatically created when a C# program starts execution. It is the first thread to run in a process and is responsible for executing the Main method. The main thread can create and manage other threads during program execution. Child Thread A child thread is any thread created from the main thread using the Thread class or other threading mechanisms. Child ...
Read MoreMatching strings with a wildcard in C#
Wildcard characters in C# allow you to match patterns in strings where some characters are unknown. The most common wildcard is the asterisk (*), which represents zero or more characters. C# provides several ways to implement wildcard matching, including regular expressions and custom methods. Using Regular Expressions for Wildcard Matching Regular expressions are the most powerful way to implement wildcard pattern matching. The pattern \bt\S*s\b matches words that start with 't' and end with 's' − Example using System; using System.Text.RegularExpressions; namespace Demo { public class Program { ...
Read MoreSet the coordinates of the area in an image map in HTML?
To set the coordinates of the area in an image map, use the coords attribute in HTML. The coords attribute defines the clickable areas within an image map by specifying precise coordinates that correspond to different shapes like rectangles, circles, and polygons. Syntax Following is the syntax for the coords attribute − The coordinate values depend on the shape type specified in the shape attribute. Coordinate Values by Shape The coords attribute accepts different coordinate formats based on the shape − Rectangle (rect) − coords="x1, y1, x2, y2" where ...
Read MoreHow to specify the number of visible options for in HTML?
The size attribute in HTML is used to specify the number of visible options in a dropdown list. By default, a select element shows only one option and displays as a dropdown. When you add the size attribute, it transforms the dropdown into a scrollable list box showing multiple options at once. Syntax Following is the syntax for the size attribute − Option 1 Option 2 Where number is a positive integer representing how many options should be visible without scrolling. Default Behavior vs ...
Read MoreIs it possible to style HTML5 audio tag?
HTML5 audio tags can be styled in multiple ways. By using the audio tag with the controls attribute, the default browser player is displayed. However, you can create completely custom audio controls by removing the controls attribute and building your own interface using HTML, CSS, and JavaScript. Syntax Following is the basic syntax for the HTML5 audio element − For custom controls without the default browser interface − Play Pause Styling Default Audio Controls The default browser controls have ...
Read MoreHTML5 Geolocation without SSL connection
HTML5 Geolocation allows web applications to access the user's location information through the browser's built-in geolocation API. While modern browsers typically require HTTPS for geolocation access, there are alternative approaches for non-SSL environments such as using IP-based location services or fallback methods. Browser Geolocation API The HTML5 Geolocation API provides access to the user's location through the navigator.geolocation object. This API requires user permission and works best over HTTPS connections. Syntax Following is the basic syntax for the geolocation API − navigator.geolocation.getCurrentPosition(successCallback, errorCallback, options); Example − Basic Geolocation ...
Read MoreHow to deal with floating point number precision in JavaScript?
Floating point precision issues occur when JavaScript cannot exactly represent certain decimal numbers in binary format. Common problems include 0.1 + 0.2 = 0.30000000000000004. JavaScript provides several methods to handle these precision issues. The Floating Point Problem JavaScript uses IEEE 754 double-precision floating-point format, which can cause unexpected results: console.log(0.1 + 0.2); // 0.30000000000000004 console.log(0.1 + 0.2 === 0.3); // false ...
Read MoreHow to display JavaScript variable value in alert box?
To display JavaScript variable values in an alert box, you can pass variables directly to the alert() function. This is useful for debugging or showing information to users. Basic Syntax alert(variableName); alert("Text: " + variableName); alert(`Template: ${variableName}`); Example: Displaying Single Variable function showSingle() { var message = "Hello World!"; alert(message); } ...
Read MoreType Selectors in CSS
Type selectors in CSS target HTML elements directly by their tag names. They are the most basic form of CSS selectors and apply styles to all instances of a specific HTML element throughout the document. Syntax element { property: value; } Where element is any valid HTML tag name like h1, p, div, span, etc. Example: Styling Headings h1 { ...
Read MoreHTML5/CSS align list-items depending on other columns mutual height
When working with HTML5 and CSS, aligning list items across columns of different heights is a common layout challenge. Using CSS Flexbox provides an elegant solution for creating flexible, responsive columns with proper alignment. Basic Flex Layout Structure The wrapper container uses display: flex to create a flexible row layout: .wrap { display: flex; } .wrap .col { flex: 1 0 33%; } The flex: 1 0 33% property means each column will grow equally, never shrink below its content size, and start with a ...
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