Control nested for-loops Swift 3

Question

This must be simple for whoever has experience I guess. All I am trying to do is to put together in an array of dictionaries the days of the month with their respective days of the week using nested for-loops.

For example:

I create an instance of the array like so:

let arrayOfDictionaries:[[String:Any]] = [[String:Any]]()

I later create an array of the days of the week:

let daysOfWeek = ["Monday","Tuesday"..."Sunday"]

Then I have a for loop for the 31 days of the month of October, with for loop inside regarding the days of the week:

for i in 1...31 {
  for day in daysOfWeek{
     arrayOfDictionaries.append(["Monday",1])
     ....
  }
}

At the end I want to end up with arrayOfDictionaries looking like so (Assuming October would start on a Monday):

[["Monday",1],["Tuesday",2]...["Monday",8],["Tuesday",9]...["Monday",16],["Tuesday",17]...and so on up to the 31st]

Any help would be much appreciated.

Answer 1

This can be solved using the modulo operator!

var arrayOfDictionaries:[[String:Any]] = [[String:Any]]()
let daysOfWeek = ["Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"]


for i in 1...31 {
    arrayOfDictionaries.append([daysOfWeek[((i - 1) % 7)]:i])
}