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# Robot Simulator Write a robot simulator. A robot factory's test facility needs a program to verify robot movements. The robots have three possible movements: - turn right - turn left - advance Robots are placed on a hypothetical infinite grid, facing a particular direction (north, east, south, or west) at a set of {x,y} coordinates, e.g., {3,8}, with coordinates increasing to the north and east. The robot then receives a number of instructions, at which point the testing facility verifies the robot's new position, and in which direction it is pointing. - The letter-string "RAALAL" means: - Turn right - Advance twice - Turn left - Advance once - Turn left yet again - Say a robot starts at {7, 3} facing north. Then running this stream of instructions should leave it at {9, 4} facing west. ## Running the tests 1. Go to the root of your PHP exercise directory, which is `<EXERCISM_WORKSPACE>/php`. To find the Exercism workspace run % exercism debug | grep Workspace 1. Get [PHPUnit] if you don't have it already. % wget --no-check-certificate https://phar.phpunit.de/phpunit.phar % chmod +x phpunit.phar 2. Execute the tests: % ./phpunit.phar robot-simulator/robot-simulator_test.php [PHPUnit]: http://phpunit.de ## Source Inspired by an interview question at a famous company. ## Submitting Incomplete Solutions It's possible to submit an incomplete solution so you can see how others have completed the exercise.
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75 entries across 75 versions & 1 rubygems