object.isArray

A quick way to check if an object is an array...

Syntax

The .isArray property is added to all objects, but only returns true on arrays.

var returnValue = obj.isArray;

Return value

Value	Type	Notes	API Version
`true`	Boolean	The object is an array	1.0
`false`	Boolean	The object is not an array	1.0

Examples

Pre-check that a value is not null before using .isArray...

var val = null;
 
if (val.isArray) { // Reference Error (null.isArray not defined)
}
 
if (val && val.isArray) { // false
	// do stuff if array
}
 
// alternate approach using typeOf()
if (typeOf(val) == "array") { // false
	// do stuff if array
}

The arguments object inside functions is not a real array...

The arguments object isn't an array!

function foo() {
	if (arguments.isArray) { // false
		// will never get called
    }
 
	// turn in to a real array with toArray()
	arguments = toArray(arguments);
 
	if (arguments.isArray) { // true
		// will get called
	}
}

Availability STABLE

Requires:

Warzone 3.1 or above
Util API

Type Checking

Topics:

classOf() — Returns the name of the class (constructor) used to create an object...
object.isFunction — A quick way to check if an object is a function...
typeOf() — Returns a more accurate object type name than Javascript's native "typeof https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/typeof" operator...
object.isArray — A quick way to check if an object is an array...

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