Array Methods in JavaScript

What is an Array ?

An array is a collection of similar data elements stored at contiguous memory locations. It is the simplest data structure where each data element can be accessed directly by using the index number of the element. Index number of elements starts from zero.

    let a = [1,2,3,4,5,6,7,8,9,10]

Iterate through array

    for(let element of a) console.log(element)

    a.forEach(element => console.log(element))

at()

takes an integer value and returns the item at that index

concat()

Join several arrays into one

indexOf()

Returns the first position at which a given element appears in an array

join()

Combine elements of an array into a single string and return the string

lastIndexOf()

Gives the last position at which a given element appears in an array

pop()

Removes the last element of an array

push()

Add a new element at the end

reverse()

Reverse the order of the elements in an array

shift()

Remove the first element of an array

slice()

Pulls a copy of a portion of an array into a new array of 4 24

sort()

Sorts elements alphabetically

splice()

Adds elements in a specified way and position

toString()

Converts elements to strings

unshift()

Adds a new element to the beginning

valueOf()

Returns the primitive value of the specified object