pacman-rules

pacman-rules/.exercism/config.json

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+{
+  "authors": [
+    "lpil"
+  ],
+  "files": {
+    "solution": [
+      "src/pacman_rules.gleam"
+    ],
+    "test": [
+      "test/pacman_rules_test.gleam"
+    ],
+    "exemplar": [
+      ".meta/example.gleam"
+    ],
+    "invalidator": [
+      "gleam.toml",
+      "manifest.toml"
+    ]
+  },
+  "forked_from": [
+    "elixir/pacman_rules"
+  ],
+  "blurb": "Learn about bools by implementing the rules of the Pac-Man game."
+}

pacman-rules/.exercism/metadata.json

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+{"track":"gleam","exercise":"pacman-rules","id":"7c358f94ccb149fba1cd23469615a463","url":"https://exercism.org/tracks/gleam/exercises/pacman-rules","handle":"fw353qwgs","is_requester":true,"auto_approve":false}

pacman-rules/.gitignore

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+*.beam
+*.ez
+build
+erl_crash.dump

pacman-rules/HELP.md

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+# 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/pacman_rules.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.

pacman-rules/HINTS.md

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+# Hints
+
+## General
+
+- Don't worry about how the arguments are derived, just focus on combining the arguments to return the intended result.
+
+## 1. Define if pac-man can eat a ghost
+
+- The function must return a [bool][bool] value.
+- You can use the [bool][bool] operator `&&` to combine the arguments for a result.
+
+## 2. Define if pac-man scores
+
+- The function must return a [bool][bool] value.
+- You can use the [bool][bool] operator `||` to combine the arguments for a result.
+
+## 3. Define if pac-man loses
+
+- The function must return a [bool][bool] value.
+- You can use the [bool][bool] operators `&&` and `!` to combine the arguments for a result.
+
+## 4. Define if pac-man wins
+
+- The function must return a [bool][bool] value.
+- You can use the [bool][bool] operators `&&` and `!` to combine the arguments and results of one of the previously implemented functions.
+
+[bool]: https://gleam.run/book/tour/bools.html

pacman-rules/README.md

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+# Pacman Rules
+
+Welcome to Pacman Rules on Exercism's Gleam Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+If you get stuck on the exercise, check out `HINTS.md`, but try and solve it without using those first :)
+
+## Introduction
+
+## Bools
+
+Gleam represents true and false values with the `Bool` type. There are only two values: `True` and `False`. These values can be bound to a variable:
+
+```gleam
+let true_variable = True
+let false_variable = False
+```
+
+The `&&`, `||`, and `!` operators can be used to manipulate boolean values:
+
+```gleam
+True && True  // -> True
+True && False // -> False
+
+False || True  // -> True
+False || False // -> False
+
+!False // -> True
+!True  // -> False
+```
+
+The `&&` and `||` operators use short-circuit evaluation, which means that the expression on the right-hand side of the operator is only evaluated if needed.
+
+Each of the operators has a different precedence, where `!` is evaluated before `&&` and `||`. Braces can be used to evaluate one part of the expression before the others:
+
+```gleam
+!True && False   // -> False
+!{True && False} // -> True
+```
+
+## Instructions
+
+In this exercise, you need to translate some rules from the classic game Pac-Man into Gleam functions.
+
+You have four rules to translate, all related to the game states.
+
+> Don't worry about how the arguments are derived, just focus on combining the arguments to return the intended result.
+
+## 1. Define if Pac-Man eats a ghost
+
+Define the `eat_ghost` function that takes two arguments (_if Pac-Man has a power pellet active_ and _if Pac-Man is touching a ghost_) and returns a boolean value if Pac-Man is able to eat the ghost. The function should return `True` only if Pac-Man has a power pellet active and is touching a ghost.
+
+```gleam
+eat_ghost(False, True)
+// -> False
+```
+
+## 2. Define if Pac-Man scores
+
+Define the `score` function that takes two arguments (_if Pac-Man is touching a power pellet_ and _if Pac-Man is touching a dot_) and returns a boolean value if Pac-Man scored. The function should return `True` if Pac-Man is touching a power pellet or a dot.
+
+```gleam
+score(True, True)
+// -> True
+```
+
+## 3. Define if Pac-Man loses
+
+Define the `lose` function that takes two arguments (_if Pac-Man has a power pellet active_ and _if Pac-Man is touching a ghost_) and returns a boolean value if Pac-Man loses. The function should return `True` if Pac-Man is touching a ghost and does not have a power pellet active.
+
+```gleam
+lose(False, True)
+// -> True
+```
+
+## 4. Define if Pac-Man wins
+
+Define the `win` function that takes three arguments (_if Pac-Man has eaten all of the dots_, _if Pac-Man has a power pellet active_, and _if Pac-Man is touching a ghost_) and returns a boolean value if Pac-Man wins. The function should return `True` if Pac-Man has eaten all of the dots and has not lost based on the arguments defined in part 3.
+
+```gleam
+win(False, True, False)
+// -> False
+```
+
+## Source
+
+### Created by
+
+- @lpil

pacman-rules/gleam.toml

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+name = "pacman_rules"
+version = "0.1.0"
+
+[dependencies]
+gleam_otp = "~> 0.7 or ~> 1.0"
+gleam_stdlib = ">= 0.54.0 or ~> 1.0"
+simplifile = "~> 1.0"
+gleam_erlang = ">= 0.25.0 and < 1.0.0"
+gleam_yielder = ">= 1.1.0 and < 2.0.0"
+gleam_regexp = ">= 1.1.0 and < 2.0.0"
+gleam_deque = ">= 1.0.0 and < 2.0.0"
+
+[dev-dependencies]
+exercism_test_runner = "~> 1.9"

pacman-rules/manifest.toml

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+# This file was generated by Gleam
+# You typically do not need to edit this file
+
+packages = [
+  { name = "argv", version = "1.0.2", build_tools = ["gleam"], requirements = [], otp_app = "argv", source = "hex", outer_checksum = "BA1FF0929525DEBA1CE67256E5ADF77A7CDDFE729E3E3F57A5BDCAA031DED09D" },
+  { name = "exercism_test_runner", version = "1.9.0", 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 = "0B17BB25F2FF1E60266467C24FE0CA04005410306AA05E9A4B41B1852D72865C" },
+  { name = "filepath", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "filepath", source = "hex", outer_checksum = "67A6D15FB39EEB69DD31F8C145BB5A421790581BD6AA14B33D64D5A55DBD6587" },
+  { name = "gap", version = "1.1.3", build_tools = ["gleam"], requirements = ["gleam_community_ansi", "gleam_stdlib"], otp_app = "gap", source = "hex", outer_checksum = "6EF5E3B523FDFBC317E9EA28D5163EE04744A97C007106F90207569789612291" },
+  { name = "glance", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib", "glexer"], otp_app = "glance", source = "hex", outer_checksum = "E155BA1A787FD11827048355021C0390D2FE9A518485526F631A9D472858CC6D" },
+  { name = "gleam_community_ansi", version = "1.4.3", build_tools = ["gleam"], requirements = ["gleam_community_colour", "gleam_regexp", "gleam_stdlib"], otp_app = "gleam_community_ansi", source = "hex", outer_checksum = "8A62AE9CC6EA65BEA630D95016D6C07E4F9973565FA3D0DE68DC4200D8E0DD27" },
+  { name = "gleam_community_colour", version = "2.0.0", build_tools = ["gleam"], requirements = ["gleam_json", "gleam_stdlib"], otp_app = "gleam_community_colour", source = "hex", outer_checksum = "FDD6AC62C6EC8506C005949A4FCEF032038191D5EAAEC3C9A203CD53AE956ACA" },
+  { name = "gleam_deque", version = "1.0.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_deque", source = "hex", outer_checksum = "64D77068931338CF0D0CB5D37522C3E3CCA7CB7D6C5BACB41648B519CC0133C7" },
+  { name = "gleam_erlang", version = "0.34.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_erlang", source = "hex", outer_checksum = "0C38F2A128BAA0CEF17C3000BD2097EB80634E239CE31A86400C4416A5D0FDCC" },
+  { name = "gleam_json", version = "2.3.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_json", source = "hex", outer_checksum = "C55C5C2B318533A8072D221C5E06E5A75711C129E420DD1CE463342106012E5D" },
+  { name = "gleam_otp", version = "0.16.1", build_tools = ["gleam"], requirements = ["gleam_erlang", "gleam_stdlib"], otp_app = "gleam_otp", source = "hex", outer_checksum = "50DA1539FC8E8FA09924EB36A67A2BBB0AD6B27BCDED5A7EF627057CF69D035E" },
+  { name = "gleam_regexp", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_regexp", source = "hex", outer_checksum = "7F5E0C0BBEB3C58E57C9CB05FA9002F970C85AD4A63BA1E55CBCB35C15809179" },
+  { name = "gleam_stdlib", version = "0.55.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "32D8F4AE03771516950047813A9E359249BD9FBA5C33463FDB7B953D6F8E896B" },
+  { name = "gleam_yielder", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_yielder", source = "hex", outer_checksum = "8E4E4ECFA7982859F430C57F549200C7749823C106759F4A19A78AEA6687717A" },
+  { name = "glexer", version = "2.2.1", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "glexer", source = "hex", outer_checksum = "5C235CBDF4DA5203AD5EAB1D6D8B456ED8162C5424FE2309CFFB7EF438B7C269" },
+  { name = "simplifile", version = "1.7.0", build_tools = ["gleam"], requirements = ["filepath", "gleam_stdlib"], otp_app = "simplifile", source = "hex", outer_checksum = "1D5DFA3A2F9319EC85825F6ED88B8E449F381B0D55A62F5E61424E748E7DDEB0" },
+]
+
+[requirements]
+exercism_test_runner = { version = "~> 1.9" }
+gleam_deque = { version = ">= 1.0.0 and < 2.0.0" }
+gleam_erlang = { version = ">= 0.25.0 and < 1.0.0" }
+gleam_otp = { version = "~> 0.7 or ~> 1.0" }
+gleam_regexp = { version = ">= 1.1.0 and < 2.0.0" }
+gleam_stdlib = { version = ">= 0.54.0 or ~> 1.0" }
+gleam_yielder = { version = ">= 1.1.0 and < 2.0.0" }
+simplifile = { version = "~> 1.0" }

pacman-rules/src/pacman_rules.gleam

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+pub fn eat_ghost(power_pellet_active: Bool, touching_ghost: Bool) -> Bool {
+  power_pellet_active && touching_ghost
+}
+
+pub fn score(touching_power_pellet: Bool, touching_dot: Bool) -> Bool {
+  touching_power_pellet || touching_dot
+}
+
+pub fn lose(power_pellet_active: Bool, touching_ghost: Bool) -> Bool {
+  !power_pellet_active && touching_ghost
+}
+
+pub fn win(
+  has_eaten_all_dots: Bool,
+  power_pellet_active: Bool,
+  touching_ghost: Bool,
+) -> Bool {
+  has_eaten_all_dots && !lose(power_pellet_active, touching_ghost)
+}

pacman-rules/test/pacman_rules_test.gleam

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+import exercism/test_runner
+import pacman_rules
+
+pub fn main() {
+  test_runner.main()
+}
+
+pub fn ghost_gets_eaten_test() {
+  let assert True = pacman_rules.eat_ghost(True, True)
+}
+
+pub fn ghost_does_not_get_eaten_because_no_power_pellet_active_test() {
+  let assert False = pacman_rules.eat_ghost(False, True)
+}
+
+pub fn ghost_does_not_get_eaten_because_not_touching_ghost_test() {
+  let assert False = pacman_rules.eat_ghost(True, False)
+}
+
+pub fn ghost_does_not_get_eaten_because_no_power_pellet_is_active_even_if_not_touching_ghost_test() {
+  let assert False = pacman_rules.eat_ghost(False, False)
+}
+
+pub fn score_when_eating_dot_test() {
+  let assert True = pacman_rules.score(True, False)
+}
+
+pub fn score_when_eating_power_pellet_test() {
+  let assert True = pacman_rules.score(False, True)
+}
+
+pub fn no_score_when_nothing_eaten_test() {
+  let assert False = pacman_rules.score(False, False)
+}
+
+pub fn lose_if_touching_ghost_without_power_pellet_active_test() {
+  let assert True = pacman_rules.lose(False, True)
+}
+
+pub fn dont_lose_if_touching_ghost_with_power_pellet_active_test() {
+  let assert False = pacman_rules.lose(True, True)
+}
+
+pub fn dont_lose_if_not_touching_ghost_test() {
+  let assert False = pacman_rules.lose(True, False)
+}
+
+pub fn win_if_all_dots_eaten_test() {
+  let assert True = pacman_rules.win(True, False, False)
+}
+
+pub fn dont_win_if_all_dots_eaten_but_touching_ghost_test() {
+  let assert False = pacman_rules.win(True, False, True)
+}
+
+pub fn win_if_all_dots_eaten_and_touching_ghost_with_power_pellet_active_test() {
+  let assert True = pacman_rules.win(True, True, True)
+}