Below is a coding challenge that we would like you to solve. Please read through the description carefully and implement a solution for it. We don't want you to over-engineer the solution but be prepared to extend the functionality in the next step of the interview process. Finally, we ask you to submit a solution that you'd be happy to go live with and works "out of the box”.
Please complete the challenge in your preferred language.
Please create a new git branch and then commit to this as you work. When you have finished please create a pull request to master. We will then review it within 7 days. Please do not make your solution public.
Good Luck!
- Working software!
- Tests.
- A working build.
- Small checkins with good comments.
- A simple readme with build and run instructions, and maybe talk about trade offs and design decisions you made.
- Simple code (but not necessarily easy!)
- The fewer libraries the better - we want to see your code. If you do use a library then explain why in the readme.
- We like functional constructs but also value good domain names and modelling.
- Evidence you have thought about edge cases and errors (either in code or the readme).
You're given the task of writing a simple console version of a drawing program. The functionality of the program is quite limited but should be extensible. The program should work as follows:
- create a new canvas.
- start drawing on the canvas by issuing various commands.
- quit.
The program should support the following commands:
| Command | Description |
|---|---|
C w h |
Should create a new canvas of width w and height h. |
L x1 y1 x2 y2 |
Should create a new line from (x1,y1) to (x2,y2). Currently only horizontal or vertical lines are supported. Horizontal and vertical lines will be drawn using the x character. |
R x1 y1 x2 y2 |
Should create a new rectangle, whose upper left corner is (x1,y1) and lower right corner is (x2,y2). Horizontal and vertical lines will be drawn using the x character. |
B x y c |
Should fill the entire area connected to (x,y) with colour 'c'. The behaviour of this is the same as that of the "bucket fill" tool in paint programs. |
Q |
Should quit the program. |
Below is a sample of the output your program should produce. User input is prefixed with enter command:.
enter command: C 20 4
----------------------
| |
| |
| |
| |
----------------------
enter command: L 1 2 6 2
----------------------
| |
|xxxxxx |
| |
| |
----------------------
enter command: L 6 3 6 4
----------------------
| |
|xxxxxx |
| x |
| x |
----------------------
enter command: R 16 1 20 3
----------------------
| xxxxx|
|xxxxxx x x|
| x xxxxx|
| x |
----------------------
enter command: B 10 3 o
----------------------
|oooooooooooooooxxxxx|
|xxxxxxooooooooox x|
| xoooooooooxxxxx|
| xoooooooooooooo|
----------------------
enter command: Q