Object-oriented approach
The esqlabsR package utilizes the concept of
object-oriented (OO) programming based on the R6 system. While the
philosophy of the package is to offer a functional programming workflow
more common for the R users, it is important to understand some basic
concepts of the OO programming. Many of the functions implemented in
esqlabsR return an instance (or an
object) of a class. These objects can be used as
inputs for other methods. Additionally, each object offers a set of
properties (which can be other objects) and methods, which are
accessible by the $ character:
# create an instance of an object
object1 <- ClassName$new()
# extract a property associated with this object
aProperty <- object1$property1
# apply a method associated with this object
resultOfAFunction <- object1$multiply(1,2)Important information about the object can be printed out by calling
print(object).