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Programming Scripts Articles
Page 14 of 33
How to convert Binary to Decimal in JavaScript?
In this tutorial, we will learn to convert the binary to decimal in JavaScript. The Binary number is used in digital electronics. It is a string of ‘0’ and ‘1’, representing the number with respect to base 2. Here are the different methods below to convert the binary number to decimal. Using the parseInt() Method In JavaScript, parseInt() method is useful to extract the number from the string. We can define the base for the number as a parameter in the parseInt() method. Syntax Users can follow the below syntax to use the parseInt() method to convert the binary to ...
Read MoreHow to check whether a value is a safe integer or not in JavaScript?
In this tutorial, we will learn to check whether a value is a safe integer or not in JavaScript. The simple definition of the safe integer in JavaScript is all numbers we can represent under the IEEE-754 double-precision number. It is the set of all numbers which lie between the -(2^53) to (2^53) exclusive, and we can represent it in the standard way. Here, we have different approaches to checking whether the number is a safe integer. Using the Number.IsSafeInteger() Method Using the if-else Conditional Statement Using the Number.isSafeInteger() Method In JavaScript, the isSafeInteger() method checks that type ...
Read MoreHow can I simplify the usage of Regular Expressions with JavaScript?
In this tutorial, we will learn to simplify the use of regular expressions in JavaScript. Some of you have heard the regular expression word for the first time. So, it is not related to JavaScript but can be used in any programming language.The simple definition of the regular expression is that it is a sequence of the characters, also called Regex or RegExp. It can be a small or complex sequence.Let’s understand the need for regular expression by the example in the below section.Why should we use regular expressions?Suppose that you are developing the application and you need to take ...
Read MoreHow can I show image rollover with a mouse event in JavaScript?
This tutorial will teach us to show image rollover with a mouse event in JavaScript. The meaning of the image rollover is to either change the image style or the whole image when the user rollovers the mouse on the image.To build an attractive user interface, developers often add image rollover features to the website and applications. Here, we will see to apply image rollover differently.Change the style of the image on mouse rolloverIn this method, to create the image rollover, we will use the onmouseover and onmouseout event of JavaScript. When users take the mouse pointer on the image, ...
Read MoreHTML5 Canvas distorted
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
Read MoreHow to draw an oval in HTML5 canvas?
You can try to run the following code to draw an oval in HTML5 canvas −Example // canvas var c = document.getElementById('newCanvas'); var context = c.getContext('2d'); var cX = 0; var cY = 0; var radius = 40; context.save(); context.translate(c.width / 2, c.height / 2); context.scale(2, 1); context.beginPath(); context.arc(cX, cY, radius, 0, 2 * Math.PI, false); context.restore(); context.fillStyle = '#000000'; context.fill(); context.lineWidth = 2; context.strokeStyle = 'yellow'; context.stroke(); Output
Read MoreExplain how to remove Leading Zeroes from a String in Java
Whenever you read an integer value into a String, you can remove leading zeroes of it using StringBuffer class, using regular expressions or, by converting the given String to character array.Converting to character arrayFollowing Java program reads an integer value from the user into a String and removes the leading zeroes from it by converting the given String into Character array.Exampleimport java.util.Scanner; public class LeadingZeroes { public static String removeLeadingZeroes(String num){ int i=0; char charArray[] = num.toCharArray(); for( ; i
Read MorePassing mouse clicks through an overlaying HTML element <div>
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; }
Read MoreRender ASP.NET TextBox as HTML5 Input type “Number”
To render ASP.NET TextBox as HTML5 input type “Number”, set type="number" directly on the textbox.Let us see an example of ASP.NET TextBox −You can also use the following dynamically created the control −TextBox tb = new TextBox(); tb.Attributes.Add("Type", "number");
Read MoreThe correct way to work with HTML5 checkbox
The following is the correct way −ExampleHere is an example − Checkbox Control Maths Physics
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