Finding every instance of a specific day within a month

Question

Finding every instance of a specific day within a month

I am in need of a function that can provide me with all the occurrences of a specific day within the current month. I have the first and last day of the month, as well as the length of the month. While I have come across functions that offer the next occurrence of a day, I am looking for a solution that can display all occurrences. I believe this may involve a loop, and I am currently working on it. Any assistance would be greatly appreciated.

$scope.recurrenceFields.by_year_day=$filter('date')($scope.fields.times.dateStart, 'yyyy');
$scope.recurrenceFields.by_month=$filter('date')($scope.fields.times.dateStart, 'M');
    var correntDay = new Date();
                           var lastDayOfMonth = new Date(correntDay.getFullYear(), correntDay.getMonth()+1, 0);
                           var firstDayOfMonth = new Date(correntDay.getFullYear(), correntDay.getMonth(), 1);
                           function daysInMonth(month,year) {
                                return new Date($filter('date')($scope.fields.times.dateStart, 'yyyy'), $scope.recurrenceFields.by_month, 0).getDate();
                            }

javascript angularjs underscore.js

Answer 1

Answer №1

Uncertain about the meaning of "all the occurrences of a specific day within a month," but the function below will provide all instances of a particular day within a month based on the input year, month, and day number.

/* @param {number} year - calendar year
 ** @param {number} month - calendar month: 1-Jan, 2-Feb, etc.
 ** @param {number} dayNumber - day number: 0-Sunday, 1-Monday, etc.
 ** @returns {Array} Dates for all days in month of dayNumber
 */
function getAllDaysInMonth(year, month, dayNumber) {
  var d = new Date(year, --month, 1);
  var dates = [];
  var daysToFirst = (dayNumber + 7 - d.getDay()) % 7;
  var firstOf = new Date(d.setDate(d.getDate() + daysToFirst));

  while (firstOf.getMonth() == month) {
    dates.push(new Date(+firstOf));
    firstOf.setDate(firstOf.getDate() + 7);
  }
  return dates;
}

// Return array of all Thursdays in July 2015
console.log(getAllDaysInMonth(2015, 7, 4));
// [Thu 02 Jul 2015,
//  Thu 09 Jul 2015,
//  Thu 16 Jul 2015,
//  Thu 23 Jul 2015,
//  Thu 30 Jul 2015]

// Get all Tuesdays in February 2000
console.log(getAllDaysInMonth(2000, 2, 2));
// [Tue 01 Feb 2000,
//  Tue 08 Feb 2000,
//  Tue 15 Feb 2000,
//  Tue 22 Feb 2000,
//  Tue 29 Feb 2000]

// Get all Sundays in December 2015
console.log(getAllDaysInMonth(2015, 12, 0));
// [Sun 06 Dec 2015,
//  Sun 13 Dec 2015,
//  Sun 20 Dec 2015,
//  Sun 27 Dec 2015]

Answer 2

Uncertain about the meaning of "all the occurrences of a specific day within a month," but the function below will provide all instances of a particular day within a month based on the input year, month, and day number.

/* @param {number} year - calendar year
 ** @param {number} month - calendar month: 1-Jan, 2-Feb, etc.
 ** @param {number} dayNumber - day number: 0-Sunday, 1-Monday, etc.
 ** @returns {Array} Dates for all days in month of dayNumber
 */
function getAllDaysInMonth(year, month, dayNumber) {
  var d = new Date(year, --month, 1);
  var dates = [];
  var daysToFirst = (dayNumber + 7 - d.getDay()) % 7;
  var firstOf = new Date(d.setDate(d.getDate() + daysToFirst));

  while (firstOf.getMonth() == month) {
    dates.push(new Date(+firstOf));
    firstOf.setDate(firstOf.getDate() + 7);
  }
  return dates;
}

// Return array of all Thursdays in July 2015
console.log(getAllDaysInMonth(2015, 7, 4));
// [Thu 02 Jul 2015,
//  Thu 09 Jul 2015,
//  Thu 16 Jul 2015,
//  Thu 23 Jul 2015,
//  Thu 30 Jul 2015]

// Get all Tuesdays in February 2000
console.log(getAllDaysInMonth(2000, 2, 2));
// [Tue 01 Feb 2000,
//  Tue 08 Feb 2000,
//  Tue 15 Feb 2000,
//  Tue 22 Feb 2000,
//  Tue 29 Feb 2000]

// Get all Sundays in December 2015
console.log(getAllDaysInMonth(2015, 12, 0));
// [Sun 06 Dec 2015,
//  Sun 13 Dec 2015,
//  Sun 20 Dec 2015,
//  Sun 27 Dec 2015]

Answer 3

Answer №2

Take advantage of this convenient service:

angular.module('myApp.utilities')
    .factory('timeManager', function () {
        return {
            parseTimeIntervals: function (startTimestamp, endTimestamp, interval) {
                if(!angular.isNumber(startTimestamp) || !angular.isNumber(endTimestamp) || !angular.isNumber(interval) || startTimestamp===0 || endTimestamp===0) {
                    return [];
                }
                var intervals = [];
                var currentTime = startTimestamp;
                while (currentTime <= endTimestamp) {
                    intervals.push(currentTime);
                    var currentDate = new Date(currentTime);
                    currentDate.setDate(currentDate.getDate() + interval);
                    currentTime = currentDate.getTime();
                }
                return intervals;
            }
        };
    });

To generate all dates within a specified range, simply use the following service:

timeManager.parseTimeIntervals(startDate, endDate, 1);

Answer 4

Take advantage of this convenient service:

angular.module('myApp.utilities')
    .factory('timeManager', function () {
        return {
            parseTimeIntervals: function (startTimestamp, endTimestamp, interval) {
                if(!angular.isNumber(startTimestamp) || !angular.isNumber(endTimestamp) || !angular.isNumber(interval) || startTimestamp===0 || endTimestamp===0) {
                    return [];
                }
                var intervals = [];
                var currentTime = startTimestamp;
                while (currentTime <= endTimestamp) {
                    intervals.push(currentTime);
                    var currentDate = new Date(currentTime);
                    currentDate.setDate(currentDate.getDate() + interval);
                    currentTime = currentDate.getTime();
                }
                return intervals;
            }
        };
    });

To generate all dates within a specified range, simply use the following service:

timeManager.parseTimeIntervals(startDate, endDate, 1);

Finding every instance of a specific day within a month

Answer №1

Answer №2

Similar questions

What is the best way to extract individual words from a string based on a specified list of tokens?

Steps for Integrating Kendo Mobile's "Tap to Load More" Feature in Knockout JS

Encountered an issue during the setup of a meanjs project with the yo generator

I am looking for a sample code for Tizen that allows scrolling of a <div> element using the bezel

Material UI allows for the creation of numbered lists with ease. This

Unexpected anomaly with Jquery's after() method

How can I incorporate a second main app.js file in Node.js to improve the organization and cleanliness of my codebase?

Pressing the ENTER key does not submit the text box data in Rails/Bootstrap, but clicking the SUBMIT button does

Transitioning images with jQuery

The function ng-hide is not successful at concealing the button

Encountering issues with JavaScript/ajax if statement functionality

Just starting out with JS, curious if it's possible to transform these circles into diamonds instead

Is it possible to generate HTML form fields with fixed positions when using Orbeon forms?

Arranging Angular Array-like Objects

Convert the jade file to an HTML file while keeping the original file name

When I attempt to send a PUT request, the req.body object appears to be empty. This issue is occurring even though I have implemented the method override middleware

What is the purpose behind jade disregarding line breaks and spaces when rendering code?

Utilizing Angular for enhanced search functionality by sending multiple query parameters

I am encountering difficulties while attempting to import Typescript files. Upon compiling them into Javascript, I am faced with errors in the web browser, specifically the issue of "exports is not defined"

What could be causing the nonassign error to occur in the angular-bootstrap tabset?