Introduction
Introduction to Data Manipulation in Array in JavaScript, here we will learn about the different methods to manipulate the data in array, and how to use them.
Array Prototype Functions
Array Prototype Functions are the functions that are available on the Array Prototype Object. These functions are used to manipulate the data in an array. We can also add our own functions to the Array Prototype Object. Here we will learn about the different Array Prototype Functions.
ForEach Function
It is a method that is used to iterate over the elements of an array. It takes a callback function as an argument, and the callback function is called for each element in the array.
Map Function
The map() method creates a new array populated with the results of calling a provided function on every element in the calling array.
Filter Method
Used to filter the elements of an array based on a condition. It returns a new array containing all elements that pass the test implemented by the provided function.
Find Method
It returns the value of the first element in the array that satisfies the provided testing function. Otherwise, undefined is returned.
Reduce Method
It is used to reduce the array to a single value, it takes a callback function as an argument, the callback function takes 4 arguments, the accumulator, the current value, the current index and the array itself.
Every Method
The every() method tests whether all elements in the array pass the test implemented by the provided function. It returns a Boolean value.
Some Method
Used to check if at least one element in an array passes a test implemented by a provided function. It returns a boolean value.