What is an Array?🤔

In JavaScript, array is an object that represent a collection of similar type of elements.

       //Syntax 
       const array_name = [item1, item2, ...]; 

       //Example
       const cars = ["Audi", "Volvo", "BMW"];

In JavaScript, an array is a variable that is used to store different data types. It basically stores different elements in one box and can be later assessed with the variable. That means we can store elements of type Number, Boolean, String, Object, etc.

• JavaScript arrays are resizable and can contain a mix of different data types.

• A pair of square brackets [ ] can be used to symbolize an array in JavaScript.

• Array follows index-based access. The index is nothing but the position of the elements of an array. The index always starts with 0.

JavaScript Array Methods 🤖

• concat():

Returns a new array comprised of this array joined with other array(s) and/or value(s).

• every():

Returns true if every element in this array satisfies the provided testing function.

• filter():

Creates a new array with all of the elements of this array for which the provided filtering function returns true.

• forEach():

Calls a function for each element in the array.

• indexOf():

Returns the first (least) index of an element within the array equal to the specified value, or -1 if none is found.

• join():

Joins all elements of an array into a string.

• lastIndexOf():

Returns the last (greatest) index of an element within the array equal to the specified value, or -1 if none is found.

• map():

Creates a new array with the results of calling a provided function on every element in this array.

• pop():

Removes the last element from an array and returns that element.

• push():

Adds one or more elements to the end of an array and returns the new length of the array.

• reduce():

Apply a function simultaneously against two values of the array (from left-to-right) as to reduce it to a single value.

• reduceRight():

Apply a function simultaneously against two values of the array (from right-to-left) as to reduce it to a single value.

• reverse():

Reverses the order of the elements of an array -- the first becomes the last, and the last becomes the first.

• shift():

Removes the first element from an array and returns that element.

• slice():

Extracts a section of an array and returns a new array.

• some():

Returns true if at least one element in this array satisfies the provided testing function.

• toSource():

Represents the source code of an object

• sort():

Sorts the elements of an array

• splice():

Adds and/or removes elements from an array.

• toString():

Returns a string representing the array and its elements.

• unshift():

Adds one or more elements to the front of an array and returns the new length of the array.

Array Properties🐱‍🚀

• constructor:

Returns a reference to the array function that created the object.

• index:

The property represents the zero-based index of the match in the string.

• length:

Reflects the number of elements in an array.

• prototype:

The prototype property allows you to add properties and methods to an object.