Hey! :raised_hands: Can I use the Dates stdlib to calculate the number of hours in a year?
which year? :stuck_out_tongue:
2022!
ooh thanks that helped me find the answer:
julia> dt = DateTime(2023,1,1) - DateTime(2022,1,1)
31536000000 milliseconds
julia> Hour(dt)
8760 hours
I was trying
julia> Hour(Year(1))
ERROR: MethodError: Cannot `convert` an object of type Year to an object of type Hour
but I guess this is impossible because of leap years?
yup
but your calculation does the right thing
julia> hoursinyear(y) = Hour(DateTime(y+1,1,1) - DateTime(y,1,1))
hoursinyear (generic function with 1 method)
julia> hoursinyear(2022)
8760 hours
julia> hoursinyear(2000)
8784 hours
julia> hoursinyear(2100)
8760 hours
julia> using Dates
julia> const HoursPerDay = 24;
julia> yearhours(yr) = HoursPerDay * daysinyear(yr)
yearhours (generic function with 1 method)
julia> map(yr->Pair(yr, yearhours(yr)), 2020:2024)
5-element Vector{Pair{Int64, Int64}}:
2020 => 8784
2021 => 8760
2022 => 8760
2023 => 8760
2024 => 8784
Last updated: Nov 22 2024 at 04:41 UTC