Obtaining an array of weeks for the previous two months from the current date using JavaScript

Question

Obtaining an array of weeks for the previous two months from the current date using JavaScript

Looking to generate a list of weeks for the past two months using JavaScript. Any suggestions on how to accomplish this task would be greatly appreciated.

[   

    {
        "week_start": "8/01/2016",
        "week_end": "8/06/2016"
    }, {
        "week_start": "8/07/2016",
        "week_end": "8/13/2016"
    }, {
        "week_start": "8/14/2016",
        "week_end": "8/20/2016"
    }, {
        "week_start": "8/21/2016",
        "week_end": "8/27/2016"
    }, {
        "week_start": "8/28/2016",
        "week_end": "9/03/2016"
    }, {
        "week_start": "9/04/2016",
        "week_end": "9/10/2016"
    }, {
        "week_start": "9/11/2016",
        "week_end": "9/17/2016"
    }, {
        "week_start": "9/18/2016",
        "week_end": "9/24/2016"
    }, {
        "week_start": "9/25/2016",
        "week_end": "10/01/2016"
    }, {
        "week_start": "10/02/2016",
        "week_end": "10/08/2016"
    }


]

javascript

Answer 1

Answer №1

To utilize native JavaScript Date objects, follow this example:

// Create two Date objects to serve as the lower and upper bounds
const currentDate = new Date();
const twoMonthsAgo = new Date();
twoMonthsAgo.setMonth(twoMonthsAgo.getMonth() - 2);

// Helper function to increment the date by two weeks
const addTwoWeeks = (date) => {
  date.setDate(date.getDate() + 7);
};

// Helper function to display weeks in the desired format
const displayWeek = (date) => {
  var nextWeek = new Date(date);
  nextWeek.setDate(nextWeek.getDate() + 7);
  return {
    "week_start": date.toLocaleString('en-US').split(',').shift(),
    "week_end": nextWeek.toLocaleString('en-US').split(',').shift()
  }
};

let data = [];

// Iterate
for (let week = new Date(twoMonthsAgo); week < currentDate; addTwoWeeks(week)) {
  data.push(displayWeek(week));
}

document.getElementById('result').innerHTML = JSON.stringify(data, null, "\t");

<pre><code id="result"></code></pre>

Answer 2

To utilize native JavaScript Date objects, follow this example:

// Create two Date objects to serve as the lower and upper bounds
const currentDate = new Date();
const twoMonthsAgo = new Date();
twoMonthsAgo.setMonth(twoMonthsAgo.getMonth() - 2);

// Helper function to increment the date by two weeks
const addTwoWeeks = (date) => {
  date.setDate(date.getDate() + 7);
};

// Helper function to display weeks in the desired format
const displayWeek = (date) => {
  var nextWeek = new Date(date);
  nextWeek.setDate(nextWeek.getDate() + 7);
  return {
    "week_start": date.toLocaleString('en-US').split(',').shift(),
    "week_end": nextWeek.toLocaleString('en-US').split(',').shift()
  }
};

let data = [];

// Iterate
for (let week = new Date(twoMonthsAgo); week < currentDate; addTwoWeeks(week)) {
  data.push(displayWeek(week));
}

document.getElementById('result').innerHTML = JSON.stringify(data, null, "\t");

<pre><code id="result"></code></pre>

Answer 3

Answer №2

If you're looking to implement date calculations in your code, check out http://momentjs.com/ for a helpful library:

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.15.1/moment.js"> </script>
<script>
  var startDay = moment("2016-07-24"); // Sunday
  var results = [];
  for (var index = 1; index < 10; index++) {
      // console.log('week_start' + startDay.add(index, 'weeks').calendar());
      // console.log('week_end' + startDay.add(index, 'weeks').subtract(1, 'days').calendar());
      results.push({
        'week_start': startDay.add(index, 'weeks').calendar(),
        'week_end': startDay.add(index, 'weeks').subtract(1, 'days').calendar()
      })
  }
  console.log(results)
</script>

Answer 4

If you're looking to implement date calculations in your code, check out http://momentjs.com/ for a helpful library:

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.15.1/moment.js"> </script>
<script>
  var startDay = moment("2016-07-24"); // Sunday
  var results = [];
  for (var index = 1; index < 10; index++) {
      // console.log('week_start' + startDay.add(index, 'weeks').calendar());
      // console.log('week_end' + startDay.add(index, 'weeks').subtract(1, 'days').calendar());
      results.push({
        'week_start': startDay.add(index, 'weeks').calendar(),
        'week_end': startDay.add(index, 'weeks').subtract(1, 'days').calendar()
      })
  }
  console.log(results)
</script>

Obtaining an array of weeks for the previous two months from the current date using JavaScript

Answer №1

Answer №2

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