- README.txt: This file. Overview of the project.
- hairdresser.py: Scheduler program. Contains classes relevant to running the program.
- intervaltree.py: Record-keeping data structure. Contains Interval Tree implementation.
- Install Python (https://www.python.org/downloads/)
- Open a terminal/command-line.
- Navigate to
HairDresserSchedulerfolder. - Type and run
python hairdresser.py - Enjoy.
- Appointments can only be booked on the current calendar day (no appointments can end on midnight or later of the current day).
- Appointments cannot be booked for times prior to the current system time.
- The
listcommand will only show upcoming appointments, based on current system time. - The
schedulecommand is split into 2 parts (Part 1: Type of Appointment, Part 2: Time of Appointment) for UX consideration. - The user input for
scheduleis strictly defined and will not process malformed input.
The data structure chosen for record keeping is an interval tree (https://en.wikipedia.org/wiki/Interval_tree). Interval trees have a query time of O(log n + m) and an initial creation time of O(n log n), while limiting memory consumption to O(n). They can efficiently find all intervals that overlap with any given interval or point.
It was very useful for the windowing queries performed to check for scheduling conflicts and dynamically printing appointments. The interval tree used in this project is an augmented Binary Search Tree.
Python was chosen as the implementation language given it's expressiveness and rich standard library. Of particular note is the Python datetime library which was critical for querying functionality.
Example: Create a haircut appointment at 9:00AM and a shampoo_haircut appointment at 2:00PM and exit.
» python hairdresser.py
Commands Available:
list - will list all future appointments
schedule - will enable an appointment to be booked
exit - stop the program
>> Please type a command: schedule
What kind of appointment?
a) Haircut (30 mins)
b) Shampoo & Haircut (1 hr)
>> Select an option (i.e. a): a
When would you like to schedule the appointment?
>> Please enter a time (i.e. 9:00AM): 9:00AM
Success, an appointment has been booked.
Name | Start | End
--------------------------
haircut | 9:00AM | 09:30AM
Commands Available:
list - will list all future appointments
schedule - will enable an appointment to be booked
exit - stop the program
>> Please type a command: schedule
What kind of appointment?
a) Haircut (30 mins)
b) Shampoo & Haircut (1 hr)
>> Select an option (i.e. a): b
When would you like to schedule the appointment?
>> Please enter a time (i.e. 9:00AM): 9:30AM
Sorry, that time has been booked.
Commands Available:
list - will list all future appointments
schedule - will enable an appointment to be booked
exit - stop the program
>> Please type a command: exit
See you later.
sugata at Air in ~/Playground
»
sugata at Air in ~/Playground
» python hairdresser.py
Commands Available:
list - will list all future appointments
schedule - will enable an appointment to be booked
exit - stop the program
>> Please type a command: schedule
What kind of appointment?
a) Haircut (30 mins)
b) Shampoo & Haircut (1 hr)
>> Select an option (i.e. a): a
When would you like to schedule the appointment?
>> Please enter a time (i.e. 9:00AM): 9:00AM
Success, an appointment has been booked.
Name | Start | End
--------------------------
haircut | 9:00AM | 09:30AM
Commands Available:
list - will list all future appointments
schedule - will enable an appointment to be booked
exit - stop the program
>> Please type a command: schedule
What kind of appointment?
a) Haircut (30 mins)
b) Shampoo & Haircut (1 hr)
>> Select an option (i.e. a): b
When would you like to schedule the appointment?
>> Please enter a time (i.e. 9:00AM): 2:00PM
Success, an appointment has been booked.
Name | Start | End
----------------------------------
haircut | 9:00AM | 09:30AM
shampoo_haircut | 2:00PM | 03:00PM
Commands Available:
list - will list all future appointments
schedule - will enable an appointment to be booked
exit - stop the program
>> Please type a command: exit
See you later.
Example: Create a haircut appointment at 9:00AM and try to book a conflicting shampoo_haircut appointment at 9:30AM.
» python hairdresser.py
Commands Available:
list - will list all future appointments
schedule - will enable an appointment to be booked
exit - stop the program
>> Please type a command: schedule
What kind of appointment?
a) Haircut (30 mins)
b) Shampoo & Haircut (1 hr)
>> Select an option (i.e. a): a
When would you like to schedule the appointment?
>> Please enter a time (i.e. 9:00AM): 9:00AM
Success, an appointment has been booked.
Name | Start | End
--------------------------
haircut | 9:00AM | 09:30AM
Commands Available:
list - will list all future appointments
schedule - will enable an appointment to be booked
exit - stop the program
>> Please type a command: schedule
What kind of appointment?
a) Haircut (30 mins)
b) Shampoo & Haircut (1 hr)
>> Select an option (i.e. a): b
When would you like to schedule the appointment?
>> Please enter a time (i.e. 9:00AM): 9:30AM
Sorry, that time has been booked.
Commands Available:
list - will list all future appointments
schedule - will enable an appointment to be booked
exit - stop the program
>> Please type a command: exit
See you later.
Example: Try to create a shampoo_haircut appointment at 11:00PM (which ends at 12:00AM, next day).
» python hairdresser.py
Commands Available:
list - will list all future appointments
schedule - will enable an appointment to be booked
exit - stop the program
>> Please type a command: schedule
What kind of appointment?
a) Haircut (30 mins)
b) Shampoo & Haircut (1 hr)
>> Select an option (i.e. a): b
When would you like to schedule the appointment?
>> Please enter a time (i.e. 9:00AM): 11:30PM
Invalid appointment time.
Commands Available:
list - will list all future appointments
schedule - will enable an appointment to be booked
exit - stop the program
>> Please type a command: exit
See you later.
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent