yahoo

Finished
44//
55
66/**
7 * @param {number} year
8 * @param {number} month
9 * @param {string} week
10 * @param {string} dayOfWeek
11 * @returns {Date}
7 * Calculates the date of a meetup based on year, month, week descriptor, and day of week.
8 *
9 * @param {number} year - The year of the meetup
10 * @param {number} month - The month of the meetup (1-12)
11 * @param {string} week - The week descriptor ('first', 'second', 'third', 'fourth', 'last', 'teenth')
12 * @param {string} dayOfWeek - The day of the week ('Sunday', 'Monday', etc.)
13 * @returns {Date} - The calculated date of the meetup
1214 */
1315export const meetup = (year, month, week, dayOfWeek) => {
14 throw new Error('Remove this line and implement the function');
16 // Map day names to their index (0 = Sunday, 1 = Monday, ..., 6 = Saturday)
17 const days = {
18 'Sunday': 0,
19 'Monday': 1,
20 'Tuesday': 2,
21 'Wednesday': 3,
22 'Thursday': 4,
23 'Friday': 5,
24 'Saturday': 6
25 };
26
27 // Edge Case: Invalid day of week
28 if (days[dayOfWeek] === undefined) {
29 throw new Error('Invalid day of week');
30 }
31
32 const targetDay = days[dayOfWeek];
33
34 // Create a date object for the first day of the given month
35 const firstDay = new Date(year, month - 1, 1);
36
37 // Edge Case: Invalid month (JavaScript Date will wrap, so we need to check)
38 if (firstDay.getMonth() !== month - 1) {
39 throw new Error('Invalid month');
40 }
41
42 // Edge Case: Invalid year (negative years are allowed in JS, but we might want to restrict)
43 if (year < 1) {
44 throw new Error('Invalid year');
45 }
46
47 // Find the first occurrence of the target day in the month
48 let firstOccurrence = firstDay.getDate() + (targetDay - firstDay.getDay() + 7) % 7;
49
50 // If the first occurrence is in the next month, adjust to the previous week
51 if (firstOccurrence > 7) {
52 firstOccurrence -= 7;
53 }
54
55 // Create a date for the first occurrence of the target day
56 const firstTargetDay = new Date(year, month - 1, firstOccurrence);
57
58 switch (week) {
59 case 'first':
60 return firstTargetDay;
61
62 case 'second':
63 // Edge Case: Month has fewer than 2 occurrences of the target day
64 return new Date(year, month - 1, firstOccurrence + 7);
65
66 case 'third':
67 // Edge Case: Month has fewer than 3 occurrences of the target day
68 return new Date(year, month - 1, firstOccurrence + 14);
69
70 case 'fourth':
71 // Edge Case: Month has fewer than 4 occurrences of the target day
72 return new Date(year, month - 1, firstOccurrence + 21);
73
74 case 'last':
75 // Find the last occurrence by going to the next month's first day and backing up
76 const nextMonth = new Date(year, month, 1);
77 const lastDayOfPrevMonth = new Date(nextMonth.getTime() - 86400000); // 24*60*60*1000
78 const lastDayOfWeek = lastDayOfPrevMonth.getDay();
79 const daysToSubtract = (lastDayOfWeek - targetDay + 7) % 7;
80 return new Date(lastDayOfPrevMonth.getTime() - daysToSubtract * 86400000);
81
82 case 'teenth':
83 // Find the teenth occurrence (13th through 19th)
84 for (let day = 13; day <= 19; day++) {
85 const date = new Date(year, month - 1, day);
86 if (date.getDay() === targetDay) {
87 return date;
88 }
89 }
90 // Edge Case: No teenth day found (should not happen with valid inputs)
91 throw new Error('No teenth day found');
92
93 default:
94 // Edge Case: Invalid week descriptor
95 throw new Error('Invalid week descriptor');
96 }
97
98 // Handled Edge Cases: Invalid day of week, Invalid month, Invalid year, Month has fewer than required occurrences of the target day, No teenth day found, Invalid week descriptor
1599};
Test NameStatus
monteenth of May 2013
Pass
monteenth of August 2013
Pass
monteenth of September 2013
Pass
tuesteenth of March 2013
Pass
tuesteenth of April 2013
Pass
tuesteenth of August 2013
Pass
wednesteenth of January 2013
Pass
wednesteenth of February 2013
Pass
wednesteenth of June 2013
Pass
thursteenth of May 2013
Pass
thursteenth of June 2013
Pass
thursteenth of September 2013
Pass
friteenth of April 2013
Pass
friteenth of August 2013
Pass
friteenth of September 2013
Pass
saturteenth of February 2013
Pass
saturteenth of April 2013
Pass
saturteenth of October 2013
Pass
sunteenth of May 2013
Pass
sunteenth of June 2013
Pass
sunteenth of October 2013
Pass
first Monday of March 2013
Pass
first Monday of April 2013
Pass
first Tuesday of May 2013
Pass
first Tuesday of June 2013
Pass
first Wednesday of July 2013
Pass
first Wednesday of August 2013
Pass
first Thursday of September 2013
Pass
first Thursday of October 2013
Pass
first Friday of November 2013
Pass
first Friday of December 2013
Pass
first Saturday of January 2013
Pass
first Saturday of February 2013
Pass
first Sunday of March 2013
Pass
first Sunday of April 2013
Pass
second Monday of March 2013
Pass
second Monday of April 2013
Pass
second Tuesday of May 2013
Pass
second Tuesday of June 2013
Pass
second Wednesday of July 2013
Pass
second Wednesday of August 2013
Pass
second Thursday of September 2013
Pass
second Thursday of October 2013
Pass
second Friday of November 2013
Pass
second Friday of December 2013
Pass
second Saturday of January 2013
Pass
second Saturday of February 2013
Pass
second Sunday of March 2013
Pass
second Sunday of April 2013
Pass
third Monday of March 2013
Pass
third Monday of April 2013
Pass
third Tuesday of May 2013
Pass
third Tuesday of June 2013
Pass
third Wednesday of July 2013
Pass
third Wednesday of August 2013
Pass
third Thursday of September 2013
Pass
third Thursday of October 2013
Pass
third Friday of November 2013
Pass
third Friday of December 2013
Pass
third Saturday of January 2013
Pass
third Saturday of February 2013
Pass
third Sunday of March 2013
Pass
third Sunday of April 2013
Pass
fourth Monday of March 2013
Pass
fourth Monday of April 2013
Pass
fourth Tuesday of May 2013
Pass
fourth Tuesday of June 2013
Pass
fourth Wednesday of July 2013
Pass
fourth Wednesday of August 2013
Pass
fourth Thursday of September 2013
Pass
fourth Thursday of October 2013
Pass
fourth Friday of November 2013
Pass
fourth Friday of December 2013
Pass
fourth Saturday of January 2013
Pass
fourth Saturday of February 2013
Pass
fourth Sunday of March 2013
Pass
fourth Sunday of April 2013
Pass
last Monday of March 2013
Pass
last Monday of April 2013
Pass
last Tuesday of May 2013
Pass
last Tuesday of June 2013
Pass
last Wednesday of July 2013
Pass
last Wednesday of August 2013
Pass
last Thursday of September 2013
Pass
last Thursday of October 2013
Pass
last Friday of November 2013
Pass
last Friday of December 2013
Pass
last Saturday of January 2013
Pass
last Saturday of February 2013
Pass
last Sunday of March 2013
Pass
last Sunday of April 2013
Pass
last Wednesday of February 2012
Pass
last Wednesday of December 2014
Pass
last Sunday of February 2015
Pass
first Friday of December 2012
Pass

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