JavaScript Array with() Method Last Updated : 15 Mar, 2024 Comments Improve Suggest changes Like Article Like Report The with() method in JavaScript Array returns a new array with the element at the given index replaced with the given value. Syntax:input_array.with(index, value)Parameters: Index: RangeError is thrown if the provided index does not exist in the array. value: It is the value that is assigned to the specified index position.Example 1: Consider a JavaScript array with 5 elements and replace the value present at Index position - 4 with 100. JavaScript let actual_array = [60, 78, 90, 34, 67]; console.log("Existing Array: ", actual_array); // with() let final_array = actual_array.with(4, 100); console.log("Final Array: ", final_array); Output: Existing Array: [60, 78, 90, 34, 67]Final Array: [60, 78, 90, 34, 100]Example 2: Let's apply map() function to this function and replace the element present at index - 4 with 100 multiplied by 2. JavaScript let actual_array = [60, 78, 90, 34, 67]; console.log("Existing Array: ", actual_array); // with() let final_array = actual_array .with(4, 100) .map((x) => x * 2); console.log("Final Array: ", final_array); Output: Existing Array: [60, 78, 90, 34, 67]Final Array: [60, 78, 90, 34, 200] Comment More infoAdvertise with us Next Article JavaScript Array with() Method sravankumar_171fa07058 Follow Improve Article Tags : JavaScript Web Technologies Similar Reads ArrayList toArray() method in Java with Examples The toArray() method of ArrayList is used to return an array containing all the elements in ArrayList in the correct order.Declaring toArray() methodpublic Object[] toArray() or public <T> T[] toArray(T[] a)Parameters: This method either accepts no parameters or it takes an array T[] as a para 3 min read CopyOnWriteArrayList set() method in Java with Examples The set(E e) method in the class CopyOnWriteArrayList class replaces the element at the specified index with the element provided as a parameter to the method. The method returns the element that has been replaced by the new element.Syntax: public E set(int index, E element) Parameters: The method t 2 min read CopyOnWriteArrayList toArray() method in Java The toArray() method of CopyOnWriteArrayList is used to return an array containing all the elements in CopyOnWriteArrayList in the correct order. Syntax: public Object[] toArray() or public <T> T[] toArray(T[] a) Parameters: This method either accepts no parameters or it takes an array T[] a a 2 min read How to Return an Array in Java? An array is a data structure that consists of a group of elements of the same data type such that each element of the array can be identified by a single array index or key. The elements of the array are stored in a way that the address of any of the elements can be calculated using the location of 5 min read DelayQueue toArray() method in Java with Examples The toArray() method of DelayQueue is used to return an array containing all the elements in DelayQueue. There elements are not in any specific order in the array.Syntax: public Object[] toArray () or public T[] toArray (T[] a) Parameters: This method either accepts no parameters or it takes an arra 4 min read Java Collection toArray() Method The toArray() method of Java Collection returns an array containing elements that are inside the calling collection. This article will discuss the toArray() method, its syntaxes, how it works, and some code examples. Syntax of toArray() MethodObject[] toArray();Return Type: The return type of the ab 3 min read How to Initialize an Array in Java? An array in Java is a linear data structure that is used to store multiple values of the same data type. In an array, each element has a unique index value, which makes it easy to access individual elements. We first need to declare the size of an array because the size of the array is fixed in Java 5 min read Java for loop vs Enhanced for loop In Java, loops are fundamental constructs for iterating over data structures or repeating blocks of code. Two commonly used loops are the for loop and the enhanced for loop. While they serve similar purposes, their applications and usage vary based on the scenario.for loop vs Enhanced for loopBelow 4 min read 25 Interesting Facts about Arrays in Java Java arrays are the workhorses of many programs, offering a structured way to store and manipulate data. While arrays are a fundamental concept, there are intriguing facts that developers may not be aware of for Java Arrays. In this blog post, we'll explore 25 interesting facts about arrays in Java, 8 min read Initialize an ArrayList in Java ArrayList is a part of the collection framework and is present in java.util package. It provides us dynamic arrays in Java. Though it may be slower than standard arrays, but can be helpful in programs where lots of manipulation in the array is needed.ArrayList inherits the AbstractList class and imp 4 min read Like