Ways to identify Sundays within a specified timeframe

Question

Ways to identify Sundays within a specified timeframe

<script>
var startDate = "2023/04/01";
var endDate = "2023/04/16";
var dateMove = new Date(startDate);
var strDate = startDate;    
while (strDate < endDate){
    var strDate = dateMove.toISOString().slice(0,10);
    array.push(strDate);
    dateMove.setDate(dateMove.getDate()+1);         
};
$('.show').html(array);
</script>
result"2023/04/01","2023/04/01","2023/04/02","2023/04/03","2023/04/04","2023/04/05","2023/04/06","2023/04/07","2023/04/08","2023/04/09","2023/04/10","2023/04/11","2023/04/12",&
"2023/04/13", "2023/04/14", "2023/04/15","2023/04/16";

how to find the Sundays in the result: 2023/04/02,2023/04/09,2023/04/16

javascript arrays

Answer 1

Answer №1

Explore the code snippet below and refer to the official documentation for details on the functions used with the Date object.

var list = [];
for (var date = new Date("2023-04-01");
  date <= new Date("2023-04-16");
  date.setUTCDate(date.getUTCDate() + 1))
  if (date.getUTCDay() === 0)
    list.push(date.toISOString().substring(0, 10));
document.body.textContent = list;

Answer 2

Explore the code snippet below and refer to the official documentation for details on the functions used with the Date object.

var list = [];
for (var date = new Date("2023-04-01");
  date <= new Date("2023-04-16");
  date.setUTCDate(date.getUTCDate() + 1))
  if (date.getUTCDay() === 0)
    list.push(date.toISOString().substring(0, 10));
document.body.textContent = list;

Answer 3

Answer №2

To find the first Sunday after the start date, you can simply add 7 days until you reach a Sunday. There is no need to iterate through each day in the range just to identify Sundays.

let start = "2024/02/15";
let end = "2024/03/01";
let current = new Date(start), finish = new Date(end);
current.setDate(current.getDate() + (7 - current.getDay()) % 7);
let result = [];
for (; current <= finish; current.setDate(current.getDate() + 7)) 
  result.push(current.toLocaleDateString('en-GB'));
console.log(result);

Answer 4

To find the first Sunday after the start date, you can simply add 7 days until you reach a Sunday. There is no need to iterate through each day in the range just to identify Sundays.

let start = "2024/02/15";
let end = "2024/03/01";
let current = new Date(start), finish = new Date(end);
current.setDate(current.getDate() + (7 - current.getDay()) % 7);
let result = [];
for (; current <= finish; current.setDate(current.getDate() + 7)) 
  result.push(current.toLocaleDateString('en-GB'));
console.log(result);

Answer 5

Answer №3

Here is a way to achieve this: 1. Define the start and end dates. 2. Iterate through each day between the start and end dates. 3. Determine if the current day is a Sunday (0 for Sunday, 1 for Monday, etc.) and add it to the sundays array. It is important to increment the currentDate within the loop.

    const startDate = new Date("2023/04/01");
    const endDate = new Date("2023/04/16");

    let currentDate = startDate;
    let sundays = [];
    while (currentDate <= endDate) {
      if (currentDate.getDay() === 0) {
        sundays.push(currentDate.toLocaleDateString('en-ZA'));
      }
      currentDate.setDate(currentDate.getDate() + 1);
    }

    console.log(sundays);

Answer 6

Here is a way to achieve this: 1. Define the start and end dates. 2. Iterate through each day between the start and end dates. 3. Determine if the current day is a Sunday (0 for Sunday, 1 for Monday, etc.) and add it to the sundays array. It is important to increment the currentDate within the loop.

    const startDate = new Date("2023/04/01");
    const endDate = new Date("2023/04/16");

    let currentDate = startDate;
    let sundays = [];
    while (currentDate <= endDate) {
      if (currentDate.getDay() === 0) {
        sundays.push(currentDate.toLocaleDateString('en-ZA'));
      }
      currentDate.setDate(currentDate.getDate() + 1);
    }

    console.log(sundays);

Answer 7

Answer №4

Here's a solution:

let start = new Date('2023-04-01');
let end = new Date('2023-04-16');
let sundays = [];

for (let date = start; date <= end; date.setDate(date.getDate() + 1)) {
  if (date.getDay() === 0) {
    sundays.push(new Date(date).toLocaleDateString('en-US'));
  }
}

console.log(sundays)

Answer 8

Here's a solution:

let start = new Date('2023-04-01');
let end = new Date('2023-04-16');
let sundays = [];

for (let date = start; date <= end; date.setDate(date.getDate() + 1)) {
  if (date.getDay() === 0) {
    sundays.push(new Date(date).toLocaleDateString('en-US'));
  }
}

console.log(sundays)

Ways to identify Sundays within a specified timeframe

Answer №1

Answer №2

Answer №3

Answer №4

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