These routines are useful when preparing to pass objects to
a Spark routine, as it is often necessary to ensure certain
parameters are scalar integers, or scalar doubles, and so on.
Arguments
- object
An R object.
- allow.na
Are NA values permitted for this object?
- allow.null
Are NULL values permitted for this object?
- default
If object is NULL, what value should
be used in its place? If default is specified, allow.null
is ignored (and assumed to be TRUE).