Red Badger tech test

Specification

• Given an input with: grid_size, robot_starting_position, and actions, return each robot's ending coordinates
• Maximum value for any coordinate is 50
• Lower left corner is 0,0
• Current accepted actions:

  F => move forward 1 coordinate
  L => turn 90 degrees to the left
  R => turn 90 degrees to the right
  

• Directions the robot can face:

  N => North (facing up (x, y+1))
  S => South
  E => East
  W => West
  

• Input is a single string with newlines, in the following format - with lines 2 & 3 repeating for each robot:

  1st line => grid size, separated by whitespace
  2nd line => starting coordinate of robot and their orientation, separated by whitespace
  3rd line => all actions for the robot, not separated
  

• If a robot goes off the map, they must return their final coordinate and orientation + LOST
• If a robot goes off the map, they leave a "warning" at their last grid location
• If another robot is asked to move off the grid over a coordinate with a "warning", they will ignore that instruction

Edge case(s):

• CORNERS: If a robot goes off the grid at 0,0 while facing South, a subsquent robot facing West will still go off the grid

Input

5 3
1 1 E 
RFRFRFRF
3 2 N 
FRRFLLFFRRFLL
0 3 W 
LLFFFLFLFL

Output

1 1 E
3 3 N LOST 
2 3 S

How to use

Set up

1. Load up IRB or a REPL of your choice
2. Require the interface.rb file:
   • If using PRY: load './lib/interface.rb'
   • If using IRB: require './lib/interface.rb'

Command

• To send your instructions: send_instructions(input)

For example, if you would like to run the sample data: send_instructions("5 3\n1 1 E\nRFRFRFRF\n3 2 N\nFRRFLLFFRRFLL\n0 3 W \nLLFFFLFLFL")