Programming Scripts Articles - Page 20 of 37

The isFinite() function accepts a value and determines whether the given value is a finite number or not. If so, this method returns true else it returns false. You can also invoke this method using Number object.SyntaxIts Syntax is as followsisFinite(5655);Example Live Demo    JavaScript Example           var result1 = Math.min();       document.write(isFinite(result1));       document.write("");       var result2 = Number.isFinite(100/0);       document.write(result2);       document.write("");       var result3 = Math.max(25, 36, 862);       document.write(isFinite(result3));     Outputfalse false true

The parseFloat() function accepts two parameters one is a string representing a number and another is a number representing the radix and returns an integer of the given radix.SyntaxIts Syntax is as followsnum.parseFloat('4524', 8);Example Live Demo    JavaScript Example           var result1 = parseFloat(Math.PI);       document.write("Result: "+result1);       document.write('');       var result2 = parseFloat("245.12@welcome");       document.write("Result: "+result2);       document.write('');       var result3 = parseFloat("11111100.010");       document.write("Result: "+result3);     OutputResult: 3.141592653589793 Result: 245.12 Result: 11111100.01

The byteLength property of the SharedArrayBuffer returns an unsigned, 32-bit integer that specifies the size/length of a SharedArrayBuffer. Syntax Its Syntax is as follows sharedArrayBuffer.byteLength Example Live Demo JavaScript Example var sharedArrayBuffer = new SharedArrayBuffer(8); var result = sharedArrayBuffer.byteLength; document.write("length of the shared array buffer is: " + result); Output length of the shared array buffer is: 8

To reduce concurrency issues in C#, use the volatile keyword. Let us seen an example.The following is how you use a volatile keyword for public variable −class Program {    public volatile int a;    public void Program(int _a) {       i = _i;    } }Let us see another example: We have two static variables. Set them in a new method −_out = "Welcome!"; _new = true;We declared them as static before using volatile −static string _out; static volatile bool new;Now you need to run the method on a thread −new Thread(new ThreadStart(volatileFunc)).Start();Read the value of the ... Read More

Adding an element to an array can be done using different functions for different positions.Adding an element at the end of the arrayThis can be accomplished using the push method. For example, let veggies = ["Onion", "Raddish"]; veggies.push("Cabbage"); console.log(veggies);This will give the output −["Onion", "Raddish", "Cabbage"]You can also use this to push multiple items at the same time as it supports a variable number ofarguments. For example, let veggies = ["Onion", "Raddish"]; veggies.push("Cabbage", "Carrot", "Broccoli"); console.log(veggies);This will give the output −["Onion", "Raddish", "Cabbage", "Carrot", "Broccoli"]Adding an element at the start of the arrayThis can be accomplished using the unshift method. ... Read More

Use the following to check the compatibility of the HTML5 tag :var $myEL = $(''); $myEL.appendTo('body'); var bgColor = $myEL.css('backgroundColor'); if (/rgb\(255\, 255\, 0\)/.test(bgColor))    return true; else    return false;

HTML5 enabled browsers to have a video element that you can use to play a video on your site. To let you know, flowplayer and other flash based video streaming players use the FLV format. It has the same encoding as H.264. FFMPEG can convert videos to FLV, feel free to work it with flowplayer. Use the flvtool2 for reading and writing FLV metadata from and to the file. Use the tools to create your videos and stream them through flowplayer.

Web Sockets is a next-generation bidirectional communication technology for web applications that operates over a single socket and is exposed via a JavaScript interface in HTML 5 compliant browsers. Once you get a Web Socket connection with the web server, you can send data from browser to server by calling a send() method, and receive data from server to browser by an onmessage event handler.Two way communication between the browsing contexts is called channel messaging. It is useful for communication across multiple origins.While creating messageChannel, it internally creates two ports to sending the data and forwarded to another browsing context. ... Read More

If the canvas looks distorted, then try to change the height and width −The default height and width of the canvas in HTML5 is of 2/1 ratio −width = 300 height = 150ExampleLet us see an example −                    #mycanvas{border:1px solid red;}                         Output

Retrieve the mouse coordinates in the click event. Now, retrieve the element by hiding your overlay, and use the following. After that, redisplay the overlay −document.elementFromPoint(x, y)You can also use the following CSS −div {    pointer-events:none; }