DevGuru JavaScript OBJECT: Array



			OBJECT: Array new Array(arrayLength) new Array(element0, element1, ..., elementN) An array is an ordered set of values grouped together under a single variable name created by using an Array object constructor. You can create an Array literal by specifying the name of the array and the values of all its elements. The following example creates an array of three elements: Code: cars = new Array("Mercedes", "Ford", "Chrysler") The elements of an array are indexed using their ordinal number, starting with 0. You could, therefore, refer to the second element in the above array ("Ford") as 'cars[1]'. You can specify the number of elements in a new array by using a single numeric parameter with the Array constructor. For example, the following code creates an array of 7 elements: Code: fruit = new Array(7) If you create an array with a single numeric parameter, that number is stored in the length property, and the array doesn't actually have any elements until some are specifically assigned to it. If, however, the parameter is not a number, an array of 1 element is created and that value assigned to it. You can easily increase the size of an array by assigning a value to an element higher than its current length. NOTE: If you specify 'language="Javascript1.2"' in the <SCRIPT> tag and use a single numeric parameter with the Array constructor, it will be seen as the value of a single element of the array rather than the number of elements you want that array to contain. PROPERTIES constructor Property The constructor property contains the function that created an object's prototype. Syntax: object.constructor index Property The read-only index property for an array created by a regular expression match and containing the zero-based index of that match. Syntax: object.index input Property The read-only input property for an array created by a regular expression match and containing the original string against which the match was made. Syntax: object.input length Property The length property holds an unsigned 32 bit integer representing the length of the array. It can be altered independently of the number of elements in the array. Syntax: object.length prototype Property The prototype property allows the addition of properties to an array. Syntax: object.prototype METHODS concat Method The concat method joins two or more Array objects producing one new one. The original Array objects are unaffected by this but, if one copy of a string or number is altered, it is not reflected in the other, whereas a change to an object reference can be seen in both copies. Syntax: Array.concat(arrayName2, arrayName3, ..., arrayNameN) join Method The join method is used to join all the elements of an array into a single string separated by a specified string separator (if none is specified, the default is a comma). Syntax: Array.join(separator) pop Method The pop method is used to remove and return the last element of an array. This affects the length of the array. Syntax: Array.pop() push Method The push method is used to add one or more elements to an array, returning the new length of it. This affects the length of the array. Syntax: Array.push(element1, ..., elementN) reverse Method The reverse method, as the name implies, reverses the order of the elements in an array making the first last and the last first. Syntax: Array.reverse() shift Method The shift method removes and returns the first element of an array. This affects the length of the array. Syntax: Array.shift() slice Method The slice method creates a new array from a selected section of an array. Syntax: Array.slice(begin[,end]) splice Method The splice method is used to add and/or remove elements of an array. Syntax; Array.splice(index, howMany, [element1][, ..., elementN]) sort Method The sort method sorts the elements of an array. Syntax: Array.sort(compareFunction) toSource Method The toSource method is inherited from the Object object and returns the source code of the array. For details see the Object.toSource method. Syntax: Array.toSource() toString Method The toString method is inherited from the Object object and returns a string representing the specified array and its elements. For more details see the Object.toString method. Syntax: Array.toString() unshift Method The unshift method adds one or more elements to the beginning of an array and returns the new length. Syntax: Array.unshift(element1,..., elementN) valueOf Method The valueOf method is inherited from the Object object and returns a primitive value for a specified array. For details see the Object.valueOf method. Syntax: Array.valueOf()