Compose choices condition call from inputs.
call_condition_choice(varname, choices)call.
(name or call or character(1))
name of the variable.
(vector)
varname values to match using the == (single value) or %in% (vector)
condition.
choices can be vector of any type but for some output might be converted:
factor call is composed on choices converted to character;
Date call is composed on choices converted to character using
format(choices);
POSIXct, POSIXlt call is composed on choices converted to character using
format(choices).
One has to be careful here as formatted date-time variable might loose
some precision (see format argument in format.POSIXlt() and output call
could be insufficient for exact comparison. In this case one should specify
varname = trunc(<varname>) and possibly convert choices to character).