The map() method is a built-in function in JavaScript that creates a new array by calling a provided function on each element of the original array. The map() method does not modify the original array; instead, it returns a new array with the results of the function calls on each eleme...
A callback function in JavaScript is a function that is passed as an argument to another function and is invoked after some kind of event.
What is a HashMap in Java? An Example of Java HashMap Operations on HashMap in Java Internal Workings of HashMap Hashmap Methods in Java Differences Between HashMap and HashSet Types of HashMaps Benefits of HashMaps in Java Conclusion To clear your basics with Java, watch What is a ...
user interaction or application context. In the example below, the user selects features by drawing a rectangle which are highlighted in green. Then as they hover over the selected features in the table, a second highlight color is used to set focus on the corresponding feature on the map....
a new element having an Object as its key and a Number as its value map.set(objKey, 3); // Adds a new element having an Array as its key and a String as its value map.set(['add', 'mapping'], 'd'); // Checks whether an element having a key of "2" exists in the map....
Functional Programming:JavaScript supportsfunctional programmingconcepts like higher-order functions, pure functions, immutability, and function composition. It provides built-in functions likemap(), reduce(),andfilter()that can be used in a functional programming style. ...
Breaking Changes in v5.0 Version 5.0 of the Node.js driver is not compatible with Node.js v12 or earlier. If you want to use this version of the driver, You must use Node.js v14.20.1 or greater. This release removes support for callbacks in favor of a promise-based API. The followi...
1. What Is JavaScript? A Detailed ExplanationIf you’re hoping to break into a career in tech, your question might sound more like: “What is JavaScript and do I need it?”If you’re interested in web development—the answer is a resounding yes. So with that out of the way, let’s...
JavaScript was first introduced and deployed in the Netscape browser version 2.0B3 in December of 1995. The naming has caused confusion, giving the impression that the language is a spinoff of Java and has been characterized by many as a marketing ploy by Netscape to give JavaScript the cachet...
Accessing browser window and document objectsJavaScript statements can be included in Web pages using the "script" element as shown in the following example: <p>Your random number is: <script type="text/javascript"> number = Math.round((Math.random()*9)+1); document.write(number); </scrip...