Sort array of days in javascript

Question

I have an array. The array can contain 1 to 7 unique strings of day names. The day names will be in order from Mon to Sun. - eg:

["Tue", "Thu", "Sun"]

I want to use javascript to sort that array so that the order will be beginning with today.

ie: if today is Friday, then the sorted array should be

["Sun", "Tue", "Thu"]

if today is Thursday then the sorted array should be

["Thu", "Sun", "Tue"]

Can anyone help?

Answer 1

const days = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"];

const sortDays = function (a, b) {
  a = days.indexOf(a);
  b = days.indexOf(b);
  return a < b ? 0 : 1;
};

const myArrayOfDays = ["Tuesday", "Saturday", "Monday", "Thursday"].sort(sortDays);
// returns ["Monday", "Tuesday", "Thursday", "Saturday"];