InDots: Is a Specific Argument in the Dots-Arguments?
Description
Returns TRUE if a specific named argument was given in the dots.
Usage
InDots(..., arg, default)
Arguments
…
the dots arguments of the function whose arguments are to be checked.
arg
the name of argument to test for.
default
the default value to return, if the argument arg does not exist in the dots.
Value
the value of the argument, if it exists else the specified default value.