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*.beam | ||
*.ez | ||
build | ||
erl_crash.dump |
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# Help | ||
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## Running the tests | ||
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To run the tests, run the command `gleam test` from within the exercise directory. | ||
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## Submitting your solution | ||
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You can submit your solution using the `exercism submit src/accumulate.gleam` command. | ||
This command will upload your solution to the Exercism website and print the solution page's URL. | ||
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It's possible to submit an incomplete solution which allows you to: | ||
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- See how others have completed the exercise | ||
- Request help from a mentor | ||
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## Need to get help? | ||
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If you'd like help solving the exercise, check the following pages: | ||
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- 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) | ||
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Should those resources not suffice, you could submit your (incomplete) solution to request mentoring. | ||
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To get help if you're having trouble, you can use one of the following resources: | ||
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- [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. |
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# Accumulate | ||
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Welcome to Accumulate on Exercism's Gleam Track. | ||
If you need help running the tests or submitting your code, check out `HELP.md`. | ||
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## Instructions | ||
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Implement the `accumulate` operation, which, given a collection and an operation to perform on each element of the collection, returns a new collection containing the result of applying that operation to each element of the input collection. | ||
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Given the collection of numbers: | ||
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- 1, 2, 3, 4, 5 | ||
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And the operation: | ||
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- square a number (`x => x * x`) | ||
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Your code should be able to produce the collection of squares: | ||
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- 1, 4, 9, 16, 25 | ||
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Check out the test suite to see the expected function signature. | ||
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## Restrictions | ||
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Keep your hands off that collect/map/fmap/whatchamacallit functionality provided by your standard library! | ||
Solve this one yourself using other basic tools instead. | ||
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## Source | ||
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### Created by | ||
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- @nono | ||
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### Contributed to by | ||
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- @lpil | ||
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### Based on | ||
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Conversation with James Edward Gray II - http://graysoftinc.com/ |
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name = "accumulate" | ||
version = "0.1.0" | ||
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[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" | ||
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[dev-dependencies] | ||
exercism_test_runner = "~> 1.4" |
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# This file was generated by Gleam | ||
# You typically do not need to edit this file | ||
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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" }, | ||
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{ 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" }, | ||
] | ||
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[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" } |
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pub fn accumulate(list: List(a), f: fn(a) -> b) -> List(b) { | ||
case list { | ||
[] -> [] | ||
[head, ..tail] -> [f(head), ..accumulate(tail, f)] | ||
} | ||
} |
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import accumulate | ||
import exercism/should | ||
import exercism/test_runner | ||
import gleam/string | ||
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pub fn main() { | ||
test_runner.main() | ||
} | ||
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pub fn empty_accumulation_test() { | ||
accumulate.accumulate([], fn(x) { x * x }) | ||
|> should.equal([]) | ||
} | ||
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pub fn accumulate_squares_test() { | ||
accumulate.accumulate([1, 2, 3], fn(x) { x * x }) | ||
|> should.equal([1, 4, 9]) | ||
} | ||
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pub fn accumulate_upcases_test() { | ||
accumulate.accumulate(["hello", "world"], string.uppercase) | ||
|> should.equal(["HELLO", "WORLD"]) | ||
} | ||
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pub fn accumulate_reversed_strings_test() { | ||
accumulate.accumulate(["the", "quick", "brown", "fox", "etc"], string.reverse) | ||
|> should.equal(["eht", "kciuq", "nworb", "xof", "cte"]) | ||
} | ||
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pub fn accumulate_recursively_test() { | ||
accumulate.accumulate(["a", "b", "c"], fn(x) -> List(String) { | ||
accumulate.accumulate(["1", "2", "3"], fn(y) -> String { | ||
string.append(x, y) | ||
}) | ||
}) | ||
|> should.equal([["a1", "a2", "a3"], ["b1", "b2", "b3"], ["c1", "c2", "c3"]]) | ||
} |