valueOf
Summary
Returns the primitive value of the specified object.
Syntax
valueOf()
Return Value
Returns the array instance.
Examples
In the following example, the instantiated array object is the same as the return value of this method.
var arr = [1, 2, 3, 4];
var s = arr.valueOf();
if (arr === s)
document.write("same");
else
document.write("different");
// Output:
// same
See also
Specification
15.2.4.4 Object.prototype.valueOf ( ) ECMAScript® Language Specification Standard ECMA-262 5.1 Edition / June 2011
Attributions
Microsoft Developer Network: Article