From 4499c956b6317171118825852d86fd172d643b44 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jo=C3=A3o=20Fernandes?= Date: Sun, 14 Apr 2024 13:02:33 -0300 Subject: [PATCH] [gleam] complete robot-simulator --- gleam/robot-simulator/.gitignore | 4 + gleam/robot-simulator/HELP.md | 32 ++++++ gleam/robot-simulator/README.md | 40 ++++++++ gleam/robot-simulator/gleam.toml | 12 +++ gleam/robot-simulator/manifest.toml | 27 ++++++ .../robot-simulator/src/robot_simulator.gleam | 73 ++++++++++++++ .../test/robot_simulator_test.gleam | 97 +++++++++++++++++++ 7 files changed, 285 insertions(+) create mode 100644 gleam/robot-simulator/.gitignore create mode 100644 gleam/robot-simulator/HELP.md create mode 100644 gleam/robot-simulator/README.md create mode 100644 gleam/robot-simulator/gleam.toml create mode 100644 gleam/robot-simulator/manifest.toml create mode 100644 gleam/robot-simulator/src/robot_simulator.gleam create mode 100644 gleam/robot-simulator/test/robot_simulator_test.gleam diff --git a/gleam/robot-simulator/.gitignore b/gleam/robot-simulator/.gitignore new file mode 100644 index 0000000..170cca9 --- /dev/null +++ b/gleam/robot-simulator/.gitignore @@ -0,0 +1,4 @@ +*.beam +*.ez +build +erl_crash.dump diff --git a/gleam/robot-simulator/HELP.md b/gleam/robot-simulator/HELP.md new file mode 100644 index 0000000..5f989ce --- /dev/null +++ b/gleam/robot-simulator/HELP.md @@ -0,0 +1,32 @@ +# Help + +## Running the tests + +To run the tests, run the command `gleam test` from within the exercise directory. + +## Submitting your solution + +You can submit your solution using the `exercism submit src/robot_simulator.gleam` command. +This command will upload your solution to the Exercism website and print the solution page's URL. + +It's possible to submit an incomplete solution which allows you to: + +- See how others have completed the exercise +- Request help from a mentor + +## Need to get help? + +If you'd like help solving the exercise, check the following pages: + +- The [Gleam track's documentation](https://exercism.org/docs/tracks/gleam) +- The [Gleam track's programming category on the forum](https://forum.exercism.org/c/programming/gleam) +- [Exercism's programming category on the forum](https://forum.exercism.org/c/programming/5) +- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs) + +Should those resources not suffice, you could submit your (incomplete) solution to request mentoring. + +To get help if you're having trouble, you can use one of the following resources: + +- [gleam.run](https://gleam.run/documentation/) is the gleam official documentation. +- [Discord](https://discord.gg/Fm8Pwmy) is the discord channel. +- [StackOverflow](https://stackoverflow.com/questions/tagged/gleam) can be used to search for your problem and see if it has been answered already. You can also ask and answer questions. \ No newline at end of file diff --git a/gleam/robot-simulator/README.md b/gleam/robot-simulator/README.md new file mode 100644 index 0000000..935a6f5 --- /dev/null +++ b/gleam/robot-simulator/README.md @@ -0,0 +1,40 @@ +# Robot Simulator + +Welcome to Robot Simulator on Exercism's Gleam Track. +If you need help running the tests or submitting your code, check out `HELP.md`. + +## Instructions + +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. + +## Source + +### Created by + +- @jiegillet + +### Based on + +Inspired by an interview question at a famous company. \ No newline at end of file diff --git a/gleam/robot-simulator/gleam.toml b/gleam/robot-simulator/gleam.toml new file mode 100644 index 0000000..27e511a --- /dev/null +++ b/gleam/robot-simulator/gleam.toml @@ -0,0 +1,12 @@ +name = "robot_simulator" +version = "0.1.0" + +[dependencies] +gleam_bitwise = "~> 1.2" +gleam_otp = "~> 0.7 or ~> 1.0" +gleam_stdlib = "~> 0.32 or ~> 1.0" +simplifile = "~> 1.0" +gleam_erlang = ">= 0.25.0 and < 1.0.0" + +[dev-dependencies] +exercism_test_runner = "~> 1.4" diff --git a/gleam/robot-simulator/manifest.toml b/gleam/robot-simulator/manifest.toml new file mode 100644 index 0000000..072155d --- /dev/null +++ b/gleam/robot-simulator/manifest.toml @@ -0,0 +1,27 @@ +# This file was generated by Gleam +# You typically do not need to edit this file + +packages = [ + { name = "argv", version = "1.0.1", build_tools = ["gleam"], requirements = [], otp_app = "argv", source = "hex", outer_checksum = "A6E9009E50BBE863EB37D963E4315398D41A3D87D0075480FC244125808F964A" }, + { name = "exercism_test_runner", version = "1.7.0", build_tools = ["gleam"], requirements = ["argv", "gap", "glance", "gleam_community_ansi", "gleam_erlang", "gleam_json", "gleam_stdlib", "simplifile"], otp_app = "exercism_test_runner", source = "hex", outer_checksum = "2FC1BADB19BEC2AE77BFD2D3A606A014C85412A7B874CAFC4BA8CF04B0B257CD" }, + { name = "gap", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_community_ansi", "gleam_stdlib"], otp_app = "gap", source = "hex", outer_checksum = "2EE1B0A17E85CF73A0C1D29DA315A2699117A8F549C8E8D89FA8261BE41EDEB1" }, + { name = "glance", version = "0.8.2", build_tools = ["gleam"], requirements = ["gleam_stdlib", "glexer"], otp_app = "glance", source = "hex", outer_checksum = "ACF09457E8B564AD7A0D823DAFDD326F58263C01ACB0D432A9BEFDEDD1DA8E73" }, + { name = "gleam_bitwise", version = "1.3.1", build_tools = ["gleam"], requirements = [], otp_app = "gleam_bitwise", source = "hex", outer_checksum = "B36E1D3188D7F594C7FD4F43D0D2CE17561DE896202017548578B16FE1FE9EFC" }, + { name = "gleam_community_ansi", version = "1.4.0", build_tools = ["gleam"], requirements = ["gleam_community_colour", "gleam_stdlib"], otp_app = "gleam_community_ansi", source = "hex", outer_checksum = "FE79E08BF97009729259B6357EC058315B6FBB916FAD1C2FF9355115FEB0D3A4" }, + { name = "gleam_community_colour", version = "1.3.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_community_colour", source = "hex", outer_checksum = "A49A5E3AE8B637A5ACBA80ECB9B1AFE89FD3D5351FF6410A42B84F666D40D7D5" }, + { name = "gleam_erlang", version = "0.25.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_erlang", source = "hex", outer_checksum = "054D571A7092D2A9727B3E5D183B7507DAB0DA41556EC9133606F09C15497373" }, + { name = "gleam_json", version = "1.0.0", build_tools = ["gleam"], requirements = ["gleam_stdlib", "thoas"], otp_app = "gleam_json", source = "hex", outer_checksum = "8B197DD5D578EA6AC2C0D4BDC634C71A5BCA8E7DB5F47091C263ECB411A60DF3" }, + { name = "gleam_otp", version = "0.10.0", build_tools = ["gleam"], requirements = ["gleam_erlang", "gleam_stdlib"], otp_app = "gleam_otp", source = "hex", outer_checksum = "0B04FE915ACECE539B317F9652CAADBBC0F000184D586AAAF2D94C100945D72B" }, + { name = "gleam_stdlib", version = "0.36.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "C0D14D807FEC6F8A08A7C9EF8DFDE6AE5C10E40E21325B2B29365965D82EB3D4" }, + { name = "glexer", version = "0.7.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "glexer", source = "hex", outer_checksum = "4484942A465482A0A100936E1E5F12314DB4B5AC0D87575A7B9E9062090B96BE" }, + { name = "simplifile", version = "1.5.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "simplifile", source = "hex", outer_checksum = "EB9AA8E65E5C1E3E0FDCFC81BC363FD433CB122D7D062750FFDF24DE4AC40116" }, + { name = "thoas", version = "0.4.1", build_tools = ["rebar3"], requirements = [], otp_app = "thoas", source = "hex", outer_checksum = "4918D50026C073C4AB1388437132C77A6F6F7C8AC43C60C13758CC0ADCE2134E" }, +] + +[requirements] +exercism_test_runner = { version = "~> 1.4" } +gleam_bitwise = { version = "~> 1.2" } +gleam_erlang = { version = ">= 0.25.0 and < 1.0.0"} +gleam_otp = { version = "~> 0.7 or ~> 1.0" } +gleam_stdlib = { version = "~> 0.32 or ~> 1.0" } +simplifile = { version = "~> 1.0" } diff --git a/gleam/robot-simulator/src/robot_simulator.gleam b/gleam/robot-simulator/src/robot_simulator.gleam new file mode 100644 index 0000000..c2dcf34 --- /dev/null +++ b/gleam/robot-simulator/src/robot_simulator.gleam @@ -0,0 +1,73 @@ +import gleam/list +import gleam/string + +pub type Robot { + Robot(direction: Direction, position: Position) +} + +pub type Direction { + North + East + South + West +} + +pub type Position { + Position(x: Int, y: Int) +} + +pub fn create(direction: Direction, position: Position) -> Robot { + Robot(direction, position) +} + +pub fn move( + direction: Direction, + position: Position, + instructions: String, +) -> Robot { + list.fold( + string.to_graphemes(instructions), + create(direction, position), + exec, + ) +} + +fn exec(robot, cmd) { + case cmd { + "A" -> advance(robot) + "L" -> turn_left(robot) + "R" -> turn_right(robot) + _ -> panic as "invalid command" + } +} + +fn advance(robot: Robot) { + case robot.direction { + North -> + create(robot.direction, Position(robot.position.x, robot.position.y + 1)) + East -> + create(robot.direction, Position(robot.position.x + 1, robot.position.y)) + South -> + create(robot.direction, Position(robot.position.x, robot.position.y - 1)) + West -> + create(robot.direction, Position(robot.position.x - 1, robot.position.y)) + } +} + +fn turn_left(robot: Robot) { + case robot.direction { + North -> create(West, robot.position) + East -> create(North, robot.position) + South -> create(East, robot.position) + West -> create(South, robot.position) + } +} + +fn turn_right(robot: Robot) { + case robot.direction { + North -> create(East, robot.position) + East -> create(South, robot.position) + South -> create(West, robot.position) + West -> create(North, robot.position) + } +} diff --git a/gleam/robot-simulator/test/robot_simulator_test.gleam b/gleam/robot-simulator/test/robot_simulator_test.gleam new file mode 100644 index 0000000..161c271 --- /dev/null +++ b/gleam/robot-simulator/test/robot_simulator_test.gleam @@ -0,0 +1,97 @@ +import exercism/should +import exercism/test_runner +import robot_simulator.{East, North, Position, Robot, South, West} + +pub fn main() { + test_runner.main() +} + +pub fn create_robot_at_origin_facing_north_test() { + robot_simulator.create(North, Position(x: 0, y: 0)) + |> should.equal(Robot(North, Position(x: 0, y: 0))) +} + +pub fn create_robot_at_negative_position_facing_south_test() { + robot_simulator.create(South, Position(x: -1, y: -1)) + |> should.equal(Robot(South, Position(x: -1, y: -1))) +} + +pub fn rotating_clockwise_changes_north_to_east_test() { + robot_simulator.move(North, Position(x: 0, y: 0), "R") + |> should.equal(Robot(East, Position(x: 0, y: 0))) +} + +pub fn rotating_clockwise_changes_east_to_south_test() { + robot_simulator.move(East, Position(x: 0, y: 0), "R") + |> should.equal(Robot(South, Position(x: 0, y: 0))) +} + +pub fn rotating_clockwise_changes_south_to_west_test() { + robot_simulator.move(South, Position(x: 0, y: 0), "R") + |> should.equal(Robot(West, Position(x: 0, y: 0))) +} + +pub fn rotating_clockwise_changes_west_to_north_test() { + robot_simulator.move(West, Position(x: 0, y: 0), "R") + |> should.equal(Robot(North, Position(x: 0, y: 0))) +} + +pub fn rotating_counter_clockwise_changes_north_to_west_test() { + robot_simulator.move(North, Position(x: 0, y: 0), "L") + |> should.equal(Robot(West, Position(x: 0, y: 0))) +} + +pub fn rotating_counter_clockwise_changes_west_to_south_test() { + robot_simulator.move(West, Position(x: 0, y: 0), "L") + |> should.equal(Robot(South, Position(x: 0, y: 0))) +} + +pub fn rotating_counter_clockwise_changes_south_to_east_test() { + robot_simulator.move(South, Position(x: 0, y: 0), "L") + |> should.equal(Robot(East, Position(x: 0, y: 0))) +} + +pub fn rotating_counter_clockwise_changes_east_to_north_test() { + robot_simulator.move(East, Position(x: 0, y: 0), "L") + |> should.equal(Robot(North, Position(x: 0, y: 0))) +} + +pub fn moving_forward_one_facing_north_increments_y_test() { + robot_simulator.move(North, Position(x: 0, y: 0), "A") + |> should.equal(Robot(North, Position(x: 0, y: 1))) +} + +pub fn moving_forward_one_facing_south_decrements_y_test() { + robot_simulator.move(South, Position(x: 0, y: 0), "A") + |> should.equal(Robot(South, Position(x: 0, y: -1))) +} + +pub fn moving_forward_one_facing_east_increments_x_test() { + robot_simulator.move(East, Position(x: 0, y: 0), "A") + |> should.equal(Robot(East, Position(x: 1, y: 0))) +} + +pub fn moving_forward_one_facing_west_decrements_x_test() { + robot_simulator.move(West, Position(x: 0, y: 0), "A") + |> should.equal(Robot(West, Position(x: -1, y: 0))) +} + +pub fn follow_series_of_instructions_moving_east_and_north_from_readme_test() { + robot_simulator.move(North, Position(x: 7, y: 3), "RAALAL") + |> should.equal(Robot(West, Position(x: 9, y: 4))) +} + +pub fn follow_series_of_instructions_moving_west_and_north_test() { + robot_simulator.move(North, Position(x: 0, y: 0), "LAAARALA") + |> should.equal(Robot(West, Position(x: -4, y: 1))) +} + +pub fn follow_series_of_instructions_moving_west_and_south_test() { + robot_simulator.move(East, Position(x: 2, y: -7), "RRAAAAALA") + |> should.equal(Robot(South, Position(x: -3, y: -8))) +} + +pub fn follow_series_of_instructions_moving_east_and_north_test() { + robot_simulator.move(South, Position(x: 8, y: 4), "LAAARRRALLLL") + |> should.equal(Robot(North, Position(x: 11, y: 5))) +}