Returns the index within the specified Array of the first occurence of the given object, starting at the specified index, and testing for equality using the Java java.lang.Object.equals() method.

Returns -1 if the object is not found.

Parameters:

a

The Array to be searched in.
obj
The object to search for.

If this parameter is null, the function will seek the first occurence of null element.

fromIndex
The index to start the search from. If not specified, 0 is assumed.

See Also:

lastIndexOf()
Tip:

You may call this function in a method-like style:

a.indexOf(obj,fromIndex)