compileListOfDayIntervals.js

/*
 * Compile an array of dates, between
 * a start and end date. Provide the ability
 * to skip days of the week.
 */

const saveDay = {
  monday:true,
  tuesday:true,
  wednesday:true,
  thursday:false,
  friday:false,
  saturday:false,
  sunday:false
}

const reorder = day => (arr, i = false) => ( 
  i = arr.indexOf(day), 
  [...arr.splice(i), ...arr ]
)

let saveDayAsBool = []
let days = []
let daysInTheFuture = 28

reorder( 'friday' )(
  Object.keys(saveDay)
).map(val => {
  saveDayAsBool.push(saveDay[val])
})

for ( let i=0; i <= daysInTheFuture; i++){
  if ( !saveDayAsBool[i%7] ) continue;
  days.push( new Date( Date.now() + 1000*60*60*24*i ) )
}

console.dir(days)
// Mon Oct 10 2016 12:04:41 GMT-0400 (EDT)
// Tue Oct 11 2016 12:04:41 GMT-0400 (EDT)
// Wed Oct 12 2016 12:04:41 GMT-0400 (EDT)
// Mon Oct 17 2016 12:04:41 GMT-0400 (EDT)
// Tue Oct 18 2016 12:04:41 GMT-0400 (EDT)
// Wed Oct 19 2016 12:04:41 GMT-0400 (EDT)
// Mon Oct 24 2016 12:04:41 GMT-0400 (EDT)
// Tue Oct 25 2016 12:04:41 GMT-0400 (EDT)
// Wed Oct 26 2016 12:04:41 GMT-0400 (EDT)
// Mon Oct 31 2016 12:04:41 GMT-0400 (EDT)
// Tue Nov 01 2016 12:04:41 GMT-0400 (EDT)
// Wed Nov 02 2016 12:04:41 GMT-0400 (EDT)