N-R > new |
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new
Availability
Flash Player 5.
Usage
new
constructor
()
Parameters
constructor
A function followed by any optional parameters in parentheses. The function is usually the name of the object type (for example, Array, Math, Number, or Object) to be constructed.
Returns
Nothing.
Description
Operator; creates a new, initially anonymous, object and calls the function identified by the constructor
parameter. The new
operator passes to the function any optional parameters in parentheses, as well as the newly created object, which is referenced using the keyword this
. The constructor function can then use this
to set the variables of the object.
The prototype
property of the constructor function is copied into the __proto__
property of the new object. As a result, the new object supports all of the methods and properties specified in the Prototype object of the constructor function.
Example
The following example creates the Book
function and then uses the new
operator to create the objects book1
and book2
.
function Book(name, price){ this.name = name; this.price = price; } book1 = new Book("Confederacy of Dunces", 19.95); book2 = new Book("The Floating Opera", 10.95);
Example
The following example uses the new operator to create an instance of the Array object with 18 elements:
golfCourse = new Array(18);
See also
[] (array access)
, {} (object initializer)
The constructor method section within each object entry.
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