Array

An Array object is used to store multiple values in a single variable.

          // Creating an array
var priority = new Array();
priority[0] = "Low";
priority[1] = "Normal";
priority[2] = "High";

// To access the first element
var level = priority[0];

// To modify the first element
priority[0] = "Not required";


// To find the length of an array
var x = priority.length 

// To find the index position of an element in the array
var i = priority.indexOf("Normal") 

        

See also Associative Array.

Array Properties

Property	Description
constructor	Returns the function that created the Array object's prototype.
length	Sets or returns the number of elements in an array.
prototype	Allows you to add properties and methods to an Array object.

Array Methods

Method	Description
concat()	Joins two or more arrays, and returns a copy of the joined arrays.
indexOf()	Search the array for an element and returns its position.
join()	Joins all elements of an array into a string.
lastIndexOf()	Search the array for an element, starting at the end, and returns its position.
pop()	Removes the last element of an array, and returns that element.
push()	Adds new elements to the end of an array, and returns the new length.
reverse()	Reverses the order of the elements in an array
shift()	Removes the first element of an array, and returns that element
slice()	Selects a part of an array, and returns the new array.
sort()	Sorts the elements of an array.
splice()	Adds/Removes elements from an array.
toString()	Converts an array to a string, and returns the result.
unshift()	Adds new elements to the beginning of an array, and returns the new length.
valueOf()	Returns the primitive value of an array