Use the clear() method to remove all elements from NavigableMap in Java.First, let us create NavigableMap −NavigableMap n = new TreeMap();Add elements to the NavigableMap −n.put(5, "Tom"); n.put(9, "John"); n.put(14, "Jamie"); n.put(1, "Tim"); n.put(4, "Jackie"); n.put(15, "Kurt"); n.put(19, "Tiger"); n.put(24, "Jacob");Remove all elements −n.clear();The following is an example to remove ... Read More

Create an array and convert it to List −Integer[] arr = { 10, 15, 20, 10, 10, 10, 20, 30, 35, 40, 40}; List l = Arrays.asList(arr);Now, let us convert the above array to HashSet −Set s = new HashSet(l);The following is an example to convert array to HashSet −Example Live ... Read More

Use the grid-auto-columns property to set a default size for columns.You can try to run the following code to implement the grid-auto-columns property with CSSExampleLive Demo                    .container {             display: grid;       ... Read More

HTML5 canvas provides methods that allow modifications directly to the transformation matrix. The transformation matrix must initially be the identity transform. It may then be adjusted using the transformation methods.ExampleLet us see an example of canvas transformation −                    function ... Read More

With grid-row property, set the size of grid items. It has grid-row-start and grid-row-end properties. You can try to run the following code to implement the CSS grid-row property.ExampleLive Demo                    .container {             display: ... Read More

Check whether a Map is empty or not using the isEmpty() method.Let us first create a NavigableMap and add some elements to it −NavigableMap n = new TreeMap(); n.put(5, "Tom"); n.put(9, "John"); n.put(14, "Jamie"); n.put(1, "Tim"); n.put(4, "Jackie"); n.put(15, "Kurt"); n.put(19, "Tiger"); n.put(24, "Jacob");Now, use the following method to check ... Read More

iFrames are replaced elements and considered different than non-replaced elements. The element is a non-replaced element.To achieve the same result i.e. to set both the left/right or top/bottom in an iframe, use a div as a wrapper with absolute position, top, left, right, bottom.Place your iframe with −width:100% height:100%.Read More

The common elements in three sorted arrays are the elements that occur in all three of them. An example of this is given as follows −Array1 = 1 3 5 7 9 Array2 = 2 3 6 7 9 Array3 = 1 2 3 4 5 6 7 8 9 ... Read More

Internet Explorer 11 does not support the element. Add support using Modernizr of the following JS −document.createElement('main');Adding the above element, will not give you the element for the browser, therefore, you need to use the following CSS finally −main {    display:block; }

HTML5 video should work in Firefox web browser. If it is still not working, try the following −Start Firefox in Safe Mode to check if any extension is creating issues.To reach Extensions, go to, Firefox/Tools > Add-ons > ExtensionsTry to turn off hardware acceleration.You need to check the media prefs ... Read More