Class "noneIndex", index class representing a subscript for none of the elements of a vector or an array dimension

Description

When used as a subscript for a vector object or for any dimension of an array object this is equivalent to integer(0).

Objects from the Class

Objects can be created by calls of the form new("noneIndex"). Objects from this class can not be modified and they are all equivalent.

Slots

.Data:

Object of class "integer", this is always equal to integer(0).

Extends

Class "integer", directly. Class "vectorIndex", directly.

Methods

Signature components for the methods are:

x+scalar:

Add scalar to x. Result is x.

scalar+x:

Add scalar to x. Result is x.

x*scalar:

Multiply x by scalar. Result is x.

scalar*x:

Multiply x by scalar. Result is x.

dim(x) <- value

Set a dimension on x. If value is of length 2, this may create a "matrixIndex".

x[i]:

Subset x. The result is an object of class "NAIndex" of length same as length(integer(0)[i]).

x[]:

Subset x with the subscript missing. Result is x.

x[i] <- value:

Subassign x. Results in an error (as objects from class "noneIndex" are not mutable.

x[[i]] <- value:

Subassign x. Results in an error (as objects from class "noneIndex" are not mutable.

allNA(x):

Are all elements of x NA? Result is always FALSE.

anyNA(x):

Is any element of x NA? Result is always FALSE.

initialize(.Object):

Initialize an object from class "allIndex".

length(x):

Return the length of x which is always 0.

length(x) <- value:

Modify the length of x. Always results in an error.

See Also

vectorIndex-class for the super class of "noneIndex".