javascript - 如何通过设置一周的第一天来对星期几进行排序？

Question

如何排序？例如，我希望我一周的第一天是星期一。从此:

周日周一周二周三周四周五周六

我想要这个:

周一周二周三周四周五周六周日

或者我希望我一周的第一天是星期五

那么输出应该是这样的:

周五周六周日周一周二周三周四

let days = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"] //by default first day of week is 0
let firstDayOfWeek = 1 //Mon

days = days.map(m=>{
  //how i can sort this?
  return m
})

Answer 1

将 firstDayOfWeek 之前的日子切片，并将它们添加到数组的末尾:

const orderByFirstDayOfWeek = (firstDayOfWeek, days) =>
  [...days.slice(firstDayOfWeek), ...days.slice(0, firstDayOfWeek)]

const days = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"] //by default first day of week is 0

console.log(JSON.stringify(orderByFirstDayOfWeek(1, days))) // Mon 1st
console.log(JSON.stringify(orderByFirstDayOfWeek(5, days))) // Fri 1st