I have an array that contains multiple Dates and, from this array, I want to return an array that contains only the Dates that belong to the current week. How can I do this?

I have an array that contains multiple Dates and, from this array, I want to return an array that contains only the Dates that belong to the current week. How can I do this?

• javascript
• date
• typescript

• Define "list" ... html, array ,other? Please take some time to read through How to Ask and minimal reproducible example – charlietfl Commented Jul 6, 2017 at 20:59
• What is the format of the dates? – sissonb Commented Jul 6, 2017 at 20:59
• @charlietfl, an array – flpn Commented Jul 6, 2017 at 21:00
• Do some research and spend time a little. Start by getWeek – Volem Commented Jul 6, 2017 at 21:01
• @sissonb I'm working with the Date class – flpn Commented Jul 6, 2017 at 21:03

3 Answers 3

The only hard part about this is finding the time frame of the week. To do that you could do:

function getWeekDates() {

  let now = new Date();
  let dayOfWeek = now.getDay(); //0-6
  let numDay = now.getDate();

  let start = new Date(now); //copy
  start.setDate(numDay - dayOfWeek);
  start.setHours(0, 0, 0, 0);


  let end = new Date(now); //copy
  end.setDate(numDay + (7 - dayOfWeek));
  end.setHours(0, 0, 0, 0);

  return [start, end];
}

let [start, end] = getWeekDates();

console.log(start.toLocaleString(), end.toLocaleString());

Now, to filter them:

function filterDatesByCurrentWeek(dates){
   let [start, end] = getWeekDates();
   return dates.filter(d => +d >= +start && +d < +end);
}

This is assuming your dates are date objects. If they are not, you'll need a way to parse them and get the date object.

I would remend using a library like momentjs.

You could easily filter the array by doing

var currentDate = moment();
var allDates = [...];
var filtered = allDates.filter(date => moment(date).isSame(currentDate, 'week');

Here's an example using filter.

let outOfWeek = new Date();
outOfWeek.setDate(outOfWeek.getDate() + 7)

const dateList = [
  new Date(),
  outOfWeek
]
const monthDay = new Date().getDate();
const weekDay = new Date().getDay();
const daysToSunday = 7 - weekDay;
const daysFromSunday = weekDay;

const setDateToMidnight = (date) =>{
  date.setHours(0);
  date.setMinutes(0);
  date.setSeconds(0);
  date.setMilliseconds(0);
}

let maxDate = new Date();
maxDate.setDate(monthDay + daysToSunday);
setDateToMidnight(maxDate);

let minDate = new Date();
minDate.setDate(monthDay - daysFromSunday);
setDateToMidnight(minDate);

filteredDates = dateList.filter((date) => {
  if (date.getTime() < maxDate.getTime() && date.getTime() >= minDate.getTime()) {
    return true;
  } else {
    return false;
  }
})

console.log(dateList);
console.log(filteredDates);

https://jsfiddle/qorb6ruL/5/