The Unicode property escapes regular expressions, allow us to match characters based on their Unicode properties by using the flag u.ExampleFollowing is an example − Live Demo Document    body {       font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;    }    .sample, .result ... Read More

The rest operator (…) allows us to call a function with any number of arguments and then access those excess arguments as an array. The rest operator also allows us in destructuring array or objects.The spread operator (…) allows us to expand an iterable like array into its individual elements.ExampleFollowing ... Read More

For this, you need to use keyDown as well as preventDefault(). Following is the JavaScript code −Example Live Demo Document    const pressEnter = (event) => {       if (event.key === "Enter") {          event.preventDefault(); ... Read More

For this, you need to use attr(). The attr() method can be used to either fetch the value of an attribute from the first element in the matched set or set attribute values onto all matched elements.Following is the JavaScript code −Example Live Demo ... Read More

Precondition to check if the list passed as parameter is empty or not. Let us see an example −Examplepublic void my_fun(List myList){    if (myList == null){       throw new IllegalArgumentException("List is null");    }    if (myList.isEmpty()){       throw new IllegalArgumentException("List is empty");    } ... Read More

Example Live Demopublic class Main{    static volatile boolean exit = false;    public static void main(String[] args){       System.out.println("Starting the main thread");       new Thread(){          public void run(){             System.out.println("Starting the inner thread");         ... Read More

Joiner provides various methods to handle joining operations on string, objects, etc. Let us see an example −Exampleimport com.google.common.base.Joiner; import java.util.*; public class Demo{    public static void main(String[] args){       String[] my_arr = { "hel", null, "lo", "wo", "r", null, "ld" };       System.out.println("The original ... Read More

To print single and multiple variables in Java, the code is as follows −Example Live Demopublic class Demo {    public static void main(String args[]){       String name_1 = "Hello";       String name_2 = "World";       System.out.println("Printing single variable");       System.out.printf("%s", name_1);   ... Read More