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Articles on Trending Technologies
Technical articles with clear explanations and examples
What is an Event Object in jQuery?
The callback function takes a single parameter; when the handler is called the JavaScript event object will be passed through it.The event object is often unnecessary and the parameter is omitted, as sufficient context is usually available when the handler is bound to know exactly what needs to be done when the handler is triggered, however there are certain attributes which you would need to be accessed.Let us see an example of isDefaultPrevented() method. The isDefaultPrevented() method checks whether event.preventDefault() was ever called on this event object.ExampleYou can try to run the following code to learn how to work with ...
Read MoreWhich one is better to use for a JavaScript link, “#” or “javascript:void(0)”?
Using “javascript:void(0)” is definitely better, since its faster. Try to run both the examples in Google Chrome with the developer tools. The “javascript:void(0)” method takes less time than the only #.Here’s the usage of “javascript: void(0)”:If inserting an expression into a web page results in an unwanted effect, then use JavaScript void to remove it. Adding “JavaScript:void(0)”, returns the undefined primitive value.The void operator is used to evaluate the given expression. After that, it returns undefined. It obtains the undefined primitive value, using void(0).The void(0) can be used with hyperlinks to obtain the undefined primitive valueExample ...
Read MoreHow to set a cookie and get a cookie with JavaScript?
Set Cookie The simplest way to create a cookie is to assign a string value to the document.cookie object, which looks like this: document.cookie = "key1=value1;key2=value2;expires=date"; Here the "expires" attribute is optional. If you provide this attribute with a valid date or time, then the cookie will expire on a given date or time and thereafter, the cookies' value will not be accessible. Example Try the following. It sets a customer name in an input cookie. Enter name: Get Cookie Reading a cookie is just as simple as writing ...
Read MoreHow to move an element of an array to a specific position (swap)?
To move an element from one position to other (swap) you need to –Create a temp variable and assign the value of the original position to it.Now, assign the value in the new position to original position.Finally, assign the value in the temp to the new position.Exampleimport java.util.Arrays; public class ChangingPositions { public static void main(String args[]) { int originalPosition = 1; int newPosition = 1; int [] myArray = {23, 93, 56, 92, 39}; int temp = myArray[originalPosition]; myArray[originalPosition] = myArray[newPosition]; myArray[newPosition] = temp; System.out.println(Arrays.toString(myArray)); } }Output[23, 39, 56, 92, 93]
Read MoreHow to determine if an argument is sent to the JavaScript function?
To determine if an argument is sent to function, use “default” parameters.ExampleYou can try to run the following to implement it function display(arg1 = 'Tutorials', arg2 = 'Learning') { document.write(arg1 + ' ' +arg2+""); } display('Tutorials', 'Learning'); display('Tutorials'); display();
Read MoreHow can I pass a parameter to a setTimeout() callback?
To pass a parameter to setTimeout() callback, use the following syntax −setTimeout(functionname, milliseconds, arg1, arg2, arg3...)The following are the parameters −function name − The function name for the function to be executed.milliseconds − The number of milliseconds.arg1, arg2, arg3 − These are the arguments passed to the function.ExampleYou can try to run the following code to pass a parameter to a setTimeout() callback Submit function timeFunction() { setTimeout(function(){ alert("After 5 seconds!"); }, 5000); } Click the above button and wait for 5 seconds.
Read MoreHow to set text font family in HTML?
To change the text font family in HTML, use the style attribute. The style attribute specifies an inline style for an element. The attribute is used with the HTML tag, with the CSS property font-family. HTML5 do not support the tag, so the CSS style is used to add font size.Just keep in mind, the usage of style attribute overrides any style set globally. It will override any style set in the HTML tag or external style sheet.ExampleYou can try to run the following code to change the text font family in an HTML page ...
Read MoreHow to add a number of months to a date using JavaScript?
To add a number of months to a date, first get the month using getMonth() method and add a number of months.ExampleYou can try to run the following code to add a number of months var d, e; d = new Date(); document.write(d); e = d.getMonth()+1; document.write("Incremented month = "+e);
Read MoreHow to Convert a Java 8 Stream to an Array?
To convert a stream to an Array in Java -Collect the stream to a list using the Collect interface and the Collectors class.Now convert the list to an array using the toArray() method.Exampleimport java.util.Arrays; import java.util.List; import java.util.stream.Collectors; import java.util.stream.Stream; public class J8StreamToArray { public static void main(String args[]) { String[] myArray = { "JavaFX", "OpenCV", "WebGL", "HBase" }; Stream stream = Stream.of(myArray); List list = stream.collect(Collectors.toList()); String[] str = list.toArray(new String[0]); System.out.println(Arrays.toString(str)); } }Output[JavaFX, OpenCV, WebGL, HBase]
Read MoreHow can I pop-up a print dialog box using JavaScript?
To pop-up a print dialog box using JavaScript, use the print() method. With the dialog box, you can easily set the printing options like which printer to select for printing.This is the dialog box −ExampleYou can try to run the following code to learn how to print a page − Click to Print function display() { window.print(); }
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