explanation.md

MyCalendar Booking System - Step-by-Step Explanation

C++ Code

1. Class Definition:

   • The class MyCalendar is defined with a private member bookings, which is a vector storing pairs of start and end times for booked events.

2. Constructor:

   • The constructor initializes the MyCalendar object. It doesn't require any parameters.

3. Booking Function:

   • The book method is used to attempt to book a new event with a specified start and end time.
   • It iterates through all previously booked events stored in bookings.
   • For each existing event, it checks if there is an overlap with the new event. Overlap occurs if the new event’s start time is before the end of the existing event, and the new event’s end time is after the start of the existing event.
   • If an overlap is found, the method returns false.
   • If no overlap is found, the new event is added to the bookings vector, and the method returns true.

Java Code

1. Class Definition:

   • The MyCalendar class is defined with a private member bookings, which is an ArrayList that stores pairs of start and end times for each booked event.

2. Constructor:

   • The constructor initializes the bookings list where all future bookings will be stored.

3. Booking Function:

   • The book method is used to attempt booking a new event with start and end times.
   • It iterates through all existing bookings and checks for conflicts.
   • If an overlap is found between the new event and any existing event (using the same logic as in the C++ code), the method returns false.
   • If no conflict is found, the event is added to the bookings list, and true is returned to indicate a successful booking.

JavaScript Code

1. Class Definition:

   • The MyCalendar class is created using a constructor function, initializing an empty bookings array to store the events.

2. Booking Function:

   • The book method is responsible for attempting to book a new event.
   • It loops through all the previously booked events and checks if the new event overlaps with any existing event.
   • If an overlap is detected, it returns false.
   • If no overlap is found, it adds the new event (represented as an array with start and end times) to the bookings array and returns true for a successful booking.

Python Code

1. Class Definition:

   • The MyCalendar class is defined with a member bookings, which is a list storing tuples representing the start and end times of each event.

2. Constructor:

   • The constructor initializes the bookings list, which will store all booked events.

3. Booking Function:

   • The book method is responsible for attempting to book a new event with specified start and end times.
   • It checks if there is an overlap between the new event and any previously booked event by iterating through the bookings list.
   • If an overlap is found, the function returns false.
   • If no overlap is detected, the event is added to the bookings list and the function returns true, indicating the booking was successful.

Go Code

1. Struct Definition:

   • A MyCalendar struct is defined with a field bookings, which is a 2D slice (slice of slices) to store start and end times for all booked events.

2. Constructor:

   • The Constructor function initializes and returns an empty MyCalendar struct with no bookings.

3. Booking Function:

   • The Book method is used to try and book a new event with start and end times.
   • It checks for conflicts by iterating through all previously booked events stored in the bookings field.
   • If an overlap is found between the new event and any existing event, the method returns false.
   • If no overlap is detected, the new event is appended to the bookings slice, and the method returns true, indicating the event was successfully booked.

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Each code implementation follows the same general steps of iterating through existing bookings, checking for overlaps, and deciding whether to add the new event based on the overlap condition.