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https://github.com/coding-horror/basic-computer-games.git
synced 2025-12-22 07:10:42 -08:00
95 Weekday - move methods into appropriate? scopes or classes
This commit is contained in:
Steve Bosman
@@ -50,8 +50,10 @@ function tab(spaceCount) {
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const MONTHS_PER_YEAR = 12;
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const DAYS_PER_COMMON_YEAR = 365;
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const DAYS_PER_IDEAL_MONTH = 30;
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const DAYS_PER_IDEALISED_MONTH = 30;
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const MAXIMUM_DAYS_PER_MONTH = 31;
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// In a common (non-leap) year the day of the week for the first of each month moves by the following amounts.
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const COMMON_YEAR_MONTH_OFFSET = [0, 3, 3, 6, 1, 4, 6, 2, 5, 0, 3, 5];
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/**
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* Date representation.
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@@ -105,6 +107,60 @@ class DateStruct {
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return result;
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}
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/**
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* The following performs a hash on the day parts which guarantees that
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* 1. different days will return different numbers
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* 2. the numbers returned are ordered.
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* @returns {number}
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*/
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getNormalisedDay() {
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return (this.year * MONTHS_PER_YEAR + this.month) * MAXIMUM_DAYS_PER_MONTH + this.day;
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}
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/**
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* Determine the day of the week.
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* This calculation returns a number between 1 and 7 where Sunday=1, Monday=2, ..., Saturday=7.
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* @returns {number} Value between 1 and 7 representing Sunday to Saturday.
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*/
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getDayOfWeek() {
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// Calculate an offset based on the century part of the year.
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const centuriesSince1500 = Math.floor((this.year - 1500) / 100);
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let centuryOffset = centuriesSince1500 * 5 + (centuriesSince1500 + 3) / 4;
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centuryOffset = Math.floor(centuryOffset % 7);
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// Calculate an offset based on the shortened two digit year.
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// January 1st moves forward by approximately 1.25 days per year
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const yearInCentury = this.year % 100;
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const yearInCenturyOffsets = yearInCentury / 4 + yearInCentury;
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// combine offsets with day and month
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let dayOfWeek = centuryOffset + yearInCenturyOffsets + this.day + COMMON_YEAR_MONTH_OFFSET[this.month - 1];
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dayOfWeek = Math.floor(dayOfWeek % 7) + 1;
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if (this.month <= 2 && this.isLeapYear()) {
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dayOfWeek--;
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}
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if (dayOfWeek === 0) {
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dayOfWeek = 7;
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}
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return dayOfWeek;
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}
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/**
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* Determine if the given year is a leap year.
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* @returns {boolean}
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*/
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isLeapYear() {
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if ((this.year % 4) !== 0) {
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return false;
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} else if ((this.year % 100) !== 0) {
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return true;
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} else if ((this.year % 400) !== 0) {
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return false;
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}
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return true;
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}
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/**
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* Returns a US formatted date, i.e. Month/Day/Year.
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* @returns {string}
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@@ -169,7 +225,7 @@ class Duration {
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*/
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#fixRanges() {
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if (this.#days < 0) {
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this.#days += DAYS_PER_IDEAL_MONTH;
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this.#days += DAYS_PER_IDEALISED_MONTH;
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this.#months--;
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}
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if (this.#months < 0) {
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@@ -178,10 +234,6 @@ class Duration {
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}
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}
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toString() {
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return this.#years + "/" + this.#months + "/" + this.#days;
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}
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/**
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* Determine approximate Duration between two dates.
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* This is a naive calculation which assumes all months are 30 days.
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@@ -195,146 +247,90 @@ class Duration {
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let days = date1.day - date2.day;
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return new Duration(years, months, days);
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}
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}
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// In a common (non-leap) year the day of the week for the first of each month moves by the following amounts.
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const COMMON_YEAR_MONTH_OFFSET = [0, 3, 3, 6, 1, 4, 6, 2, 5, 0, 3, 5];
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/**
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* Reads a date, and extracts the date information.
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* This expects date parts to be comma separated, using US date ordering,
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* i.e. Month,Day,Year.
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* @returns {Promise<DateStruct>}
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*/
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async function readDateElements() {
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let dateString = await input();
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const month = parseInt(dateString);
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const day = parseInt(dateString.substr(dateString.indexOf(",") + 1));
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const year = parseInt(dateString.substr(dateString.lastIndexOf(",") + 1));
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return new DateStruct(year, month, day);
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}
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/**
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* Calculate years, months and days as factor of days.
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* This is a naive calculation which assumes all months are 30 days.
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* @param factor
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* @param dayCount
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* @returns {Duration}
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*/
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function time_spent(factor, dayCount) {
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let totalDays = Math.floor(factor * dayCount);
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const years = Math.floor(totalDays / DAYS_PER_COMMON_YEAR);
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totalDays -= years * DAYS_PER_COMMON_YEAR;
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const months = Math.floor(totalDays / DAYS_PER_IDEAL_MONTH);
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const days = totalDays - (months * DAYS_PER_IDEAL_MONTH);
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return new Duration(years, months, days);
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}
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/**
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* Print the supplied duration.
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* @param {Duration} duration
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*/
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function printTimeSpent(duration) {
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print(duration.years + "\t" + duration.months + "\t" + duration.days + "\n");
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}
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/**
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* Determine if the given year is a leap year.
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* @param year
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* @returns {boolean}
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*/
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function isLeapYear(year) {
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if ((year % 4) !== 0) {
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return false;
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} else if ((year % 100) !== 0) {
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return true;
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} else if ((year % 400) !== 0) {
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return false;
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/**
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* Calculate years, months and days as factor of days.
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* This is a naive calculation which assumes all months are 30 days.
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* @param dayCount Total day to convert to a duration
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* @param factor Factor to apply when calculating the duration
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* @returns {Duration}
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*/
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static fromDays(dayCount, factor) {
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let totalDays = Math.floor(factor * dayCount);
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const years = Math.floor(totalDays / DAYS_PER_COMMON_YEAR);
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totalDays -= years * DAYS_PER_COMMON_YEAR;
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const months = Math.floor(totalDays / DAYS_PER_IDEALISED_MONTH);
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const days = totalDays - (months * DAYS_PER_IDEALISED_MONTH);
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return new Duration(years, months, days);
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}
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return true;
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}
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/**
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* Determine the day of the week.
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* This calculation returns a number between 1 and 7 where Sunday=1, Monday=2, ..., Saturday=7.
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* @param {DateStruct} date
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* @returns {number} Value between 1 and 7 representing Sunday to Saturday.
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*/
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function getDayOfWeek(date) {
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// Calculate an offset based on the century part of the year.
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const centuriesSince1500 = Math.floor((date.year - 1500) / 100);
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let centuryOffset = centuriesSince1500 * 5 + (centuriesSince1500 + 3) / 4;
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centuryOffset = Math.floor(centuryOffset % 7);
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// Calculate an offset based on the shortened two digit year.
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// January 1st moves forward by approximately 1.25 days per year
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const yearInCentury = date.year % 100;
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const yearInCenturyOffsets = yearInCentury / 4 + yearInCentury;
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// combine offsets with day and month
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let dayOfWeek = centuryOffset + yearInCenturyOffsets + date.day + COMMON_YEAR_MONTH_OFFSET[date.month - 1];
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dayOfWeek = Math.floor(dayOfWeek % 7) + 1;
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if (date.month <= 2 && isLeapYear(date.year)) {
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dayOfWeek--;
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toString() {
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return this.#years + "/" + this.#months + "/" + this.#days;
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}
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if (dayOfWeek === 0) {
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dayOfWeek = 7;
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}
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return dayOfWeek;
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}
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/**
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* Obtain text for the day of the week.
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* @param {DateStruct} date
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* @returns {string}
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*/
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function getDayOfWeekText(date) {
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const dayOfWeek = getDayOfWeek(date);
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let dayOfWeekText = "";
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switch (dayOfWeek) {
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case 1:
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dayOfWeekText = "SUNDAY.";
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break;
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case 2:
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dayOfWeekText = "MONDAY.";
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break;
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case 3:
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dayOfWeekText = "TUESDAY.";
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break;
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case 4:
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dayOfWeekText = "WEDNESDAY.";
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break;
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case 5:
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dayOfWeekText = "THURSDAY.";
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break;
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case 6:
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if (date.day === 13) {
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dayOfWeekText = "FRIDAY THE THIRTEENTH---BEWARE!";
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} else {
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dayOfWeekText = "FRIDAY.";
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}
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break;
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case 7:
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dayOfWeekText = "SATURDAY.";
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break;
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}
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return dayOfWeekText;
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}
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/**
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* The following performs a hash on the day parts which guarantees that
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* 1. different days will return different numbers
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* 2. the numbers returned are ordered.
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* @param {DateStruct} date
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* @returns {number}
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*/
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function getNormalisedDay(date) {
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return (date.year * MONTHS_PER_YEAR + date.month) * MAXIMUM_DAYS_PER_MONTH + date.day;
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}
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// Main control section
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async function main() {
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/**
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* Reads a date, and extracts the date information.
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* This expects date parts to be comma separated, using US date ordering,
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* i.e. Month,Day,Year.
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* @returns {Promise<DateStruct>}
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*/
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async function inputDate() {
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let dateString = await input();
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const month = parseInt(dateString);
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const day = parseInt(dateString.substr(dateString.indexOf(",") + 1));
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const year = parseInt(dateString.substr(dateString.lastIndexOf(",") + 1));
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return new DateStruct(year, month, day);
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}
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/**
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* Print the supplied duration.
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* @param {Duration} duration
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*/
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function printTimeSpent(duration) {
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print(duration.years + "\t" + duration.months + "\t" + duration.days + "\n");
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}
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/**
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* Obtain text for the day of the week.
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* @param {DateStruct} date
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* @returns {string}
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*/
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function getDayOfWeekText(date) {
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const dayOfWeek = date.getDayOfWeek();
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let dayOfWeekText = "";
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switch (dayOfWeek) {
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case 1:
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dayOfWeekText = "SUNDAY.";
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break;
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case 2:
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dayOfWeekText = "MONDAY.";
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break;
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case 3:
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dayOfWeekText = "TUESDAY.";
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break;
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case 4:
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dayOfWeekText = "WEDNESDAY.";
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break;
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case 5:
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dayOfWeekText = "THURSDAY.";
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break;
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case 6:
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if (date.day === 13) {
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dayOfWeekText = "FRIDAY THE THIRTEENTH---BEWARE!";
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} else {
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dayOfWeekText = "FRIDAY.";
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}
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break;
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case 7:
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dayOfWeekText = "SATURDAY.";
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break;
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}
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return dayOfWeekText;
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}
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print(tab(32) + "WEEKDAY\n");
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print(tab(15) + "CREATIVE COMPUTING MORRISTOWN, NEW JERSEY\n");
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print("\n");
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@@ -344,18 +340,18 @@ async function main() {
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print("GIVES FACTS ABOUT A DATE OF INTEREST TO YOU.\n");
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print("\n");
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print("ENTER TODAY'S DATE IN THE FORM: 3,24,1979 ");
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const today = await readDateElements();
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const today = await inputDate();
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// This program determines the day of the week
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// for a date after 1582
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print("ENTER DAY OF BIRTH (OR OTHER DAY OF INTEREST)");
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const dateOfBirth = await readDateElements();
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const dateOfBirth = await inputDate();
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print("\n");
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// Test for date before current calendar.
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if (!dateOfBirth.isGregorianDate()) {
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print("NOT PREPARED TO GIVE DAY OF WEEK PRIOR TO X.XV.MDLXXXII.\n");
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} else {
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const normalisedToday = getNormalisedDay(today);
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const normalisedDob = getNormalisedDay(dateOfBirth);
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const normalisedToday = today.getNormalisedDay();
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const normalisedDob = dateOfBirth.getNormalisedDay();
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let dayOfWeekText = getDayOfWeekText(dateOfBirth);
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if (normalisedToday < normalisedDob) {
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@@ -377,29 +373,29 @@ async function main() {
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print(" \t-----\t------\t----\n");
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print("YOUR AGE (IF BIRTHDATE) \t");
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printTimeSpent(differenceBetweenDates);
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const approximateDaysBetween = (differenceBetweenDates.years * DAYS_PER_COMMON_YEAR) + (differenceBetweenDates.months * DAYS_PER_IDEAL_MONTH) + differenceBetweenDates.days + Math.floor(differenceBetweenDates.months / 2);
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const approximateDaysBetween = (differenceBetweenDates.years * DAYS_PER_COMMON_YEAR) + (differenceBetweenDates.months * DAYS_PER_IDEALISED_MONTH) + differenceBetweenDates.days + Math.floor(differenceBetweenDates.months / 2);
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// Create an object containing time unaccounted for
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const unaccountedTime = differenceBetweenDates.clone();
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// Calculate time spent in the following functions.
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print("YOU HAVE SLEPT \t\t\t");
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const sleepTimeSpent = time_spent(0.35, approximateDaysBetween);
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const sleepTimeSpent = Duration.fromDays(approximateDaysBetween, 0.35);
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printTimeSpent(sleepTimeSpent);
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unaccountedTime.remove(sleepTimeSpent);
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print("YOU HAVE EATEN \t\t\t");
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const eatenTimeSpent = time_spent(0.17, approximateDaysBetween);
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const eatenTimeSpent = Duration.fromDays(approximateDaysBetween, 0.17);
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printTimeSpent(eatenTimeSpent);
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unaccountedTime.remove(eatenTimeSpent);
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if (unaccountedTime.years <= 3) {
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print("YOU HAVE PLAYED \t\t");
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} else if (unaccountedTime.years <= 9) {
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print("YOU HAVE PLAYED/STUDIED \t\t");
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print("YOU HAVE PLAYED/STUDIED \t");
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} else {
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print("YOU HAVE WORKED/PLAYED \t\t");
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}
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const workPlayTimeSpent = time_spent(0.23, approximateDaysBetween);
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const workPlayTimeSpent = Duration.fromDays(approximateDaysBetween, 0.23);
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printTimeSpent(workPlayTimeSpent);
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unaccountedTime.remove(workPlayTimeSpent);
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