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The rules for this match are from http://groups.google.com/group/okrb/browse_thread/thread/94493199a52657c9 Calendar Code Challenge ======================= The contestants will complete a simple calendar application with just two abilities: users should be able to enter events and see what events will occur on a given day. The primary challenge comes from the fact that the code is expected to handle multiple types of events. Your Code --------- The code you provide really only has to do two things: accept new event entries and provide a way to list all events occurring on a given day. No judging will be done on the interface, so you are free to provide a nice interface for these two action or just build methods to call in IRb or a testing environment. Whatever is easiest for you is fine. No judging will be done on tests, documentation, or any other ancillary assets to the code itself. However, you will be judged on how easy it is for others to understand your code as outlined below and these items may help with that. You also do not need to worry about the data stressing your code. You're program doesn't need to handle so much data that it can't all be stored in memory and event fields will be consistently sane. No dates will be used that are outside a two year range centered on today, so you needn't worry about calendar changes or the resolution of Ruby's built in Time class. You just need to build the core functionality of the problem. Event Types ----------- The main challenge is that your calendar is expected to support multiple types of events. Users need to be able to create any or all of the types listed below and searches must check all known events returning all events that will fall on a given day, regardless of type. Each event type can have different fields and the types share some fields. Some fields are optional and some have defaults you need to account for. All events have a unique name (a String) and a start date and time (a Time) that are always provided. All events can also have an end date and time (also a Time), but this field can also be left nil to indicate that an event is ongoing and does not end. You can mostly ignore the time portion of all dates and times for the purposes of this exercise. We're only interested in which events appear on a given day and the times don't play into that. Beyond that, the event types differ as follows: * Daily events also have no additional fields. They recur each day between their start date and end date. * Weekly events have a frequency field (an Integer) that defaults to one and a list of days (an Array containing one or more Strings from the set: "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", and "Saturday"). These events recur each week between their start date and end date on the days indicated. If frequency is anything but one, they only appear if the week in question is divisible by the frequency when counted as an offset from the start date. For example, a frequency of two means an event occurs every other week and thus would appear within the first seven days of the start date, skip the next seven, appear in the next seven, etc. * Monthly events can be set two ways. The first type of monthly event has a frequency field (same as the weekly version, but in the scope of months), an "on the" field (a String from the set: "first", "second", "third", and "last"), and a day field (a String from the same set mentioned in the weekly events days field). Again, this date recurs monthly bounded by the start and end date and as dictated by the frequency. The difference here is that the "on the" and day fields indicate which day of the month the event happens on. * If the "on the" and day fields are omitted, you have the second type of monthly event. This event just repeats on the same day of the month as the start date (if present in the current month). These too can have a frequency to skip months. * Finally, there are yearly events that just recur on the same day of the year as their start date. These events have no additional fields. The Judging ----------- The spirit of this contest is totally for fun and there will be no official winner or loser. However, we do have some criteria upon which entries will be considered, just for friendly bragging rights! The contestants are expected to make their solutions publicly available by posting them to the mailing list two days before the February meeting. That means solutions should be posted on February 10th by 6:30 PM. At the meeting, each of you will explain the other contestant's code. You are expected to highlight how it works and point out things you like about the solution. You will be judged on how well you understand the code you are showing and on how easy your code was to understand. If you notice any problems with the code, like edge case searches it wouldn't get right, feel free to point those out as well. This shows an even greater understanding of the code on your part.