Chapter 5 - Exercise 5.2.1 Question 4 (Trick Question/ Possible Mistake)

[EnzoNMigliano]

Hello jrnold, I hope you are well!

In the question 4: "Departed in summer (July, August, and September)"

The solution might be a bit trick... The go to solution is:

filter(flights, month %in% c(7,8,9))

However, it does not consider the fact that a flight might had been schedule for September 30th at 23h59 (military time) and had a delay of 1 or more minutes. Therefore, making the flight departure on October...

A possible way of solving the problem is:

filter(flights, month >= 7, month <= 9, (flight$sched_dep_time + flight$dep_delay) <= 2359)

I am not sure if this is even a real issue (neither if my code really solves the problem Lol), but I wanted to share it anyways. Thank you jrnold and team for providing such amazing info to the community!

Best regards,

EnzoNMigliano