From 7b12692863ee44fa634d99f44d049ba1743147a7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jo=C3=A3o=20Fernandes?= Date: Thu, 27 Jun 2024 18:30:12 -0300 Subject: [PATCH] [gleam] complete flatten-array --- gleam/flatten-array/.gitignore | 4 + gleam/flatten-array/HELP.md | 32 +++++ gleam/flatten-array/README.md | 26 ++++ gleam/flatten-array/gleam.toml | 12 ++ gleam/flatten-array/manifest.toml | 27 ++++ gleam/flatten-array/src/flatten_array.gleam | 15 +++ .../test/flatten_array_test.gleam | 115 ++++++++++++++++++ 7 files changed, 231 insertions(+) create mode 100644 gleam/flatten-array/.gitignore create mode 100644 gleam/flatten-array/HELP.md create mode 100644 gleam/flatten-array/README.md create mode 100644 gleam/flatten-array/gleam.toml create mode 100644 gleam/flatten-array/manifest.toml create mode 100644 gleam/flatten-array/src/flatten_array.gleam create mode 100644 gleam/flatten-array/test/flatten_array_test.gleam diff --git a/gleam/flatten-array/.gitignore b/gleam/flatten-array/.gitignore new file mode 100644 index 0000000..170cca9 --- /dev/null +++ b/gleam/flatten-array/.gitignore @@ -0,0 +1,4 @@ +*.beam +*.ez +build +erl_crash.dump diff --git a/gleam/flatten-array/HELP.md b/gleam/flatten-array/HELP.md new file mode 100644 index 0000000..9047e7d --- /dev/null +++ b/gleam/flatten-array/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/flatten_array.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/flatten-array/README.md b/gleam/flatten-array/README.md new file mode 100644 index 0000000..0bbfeec --- /dev/null +++ b/gleam/flatten-array/README.md @@ -0,0 +1,26 @@ +# Flatten Array + +Welcome to Flatten Array on Exercism's Gleam Track. +If you need help running the tests or submitting your code, check out `HELP.md`. + +## Instructions + +Take a nested list and return a single flattened list with all values except nil/null. + +The challenge is to write a function that accepts an arbitrarily-deep nested list-like structure and returns a flattened structure without any nil/null values. + +For example: + +input: [1,[2,3,null,4],[null],5] + +output: [1,2,3,4,5] + +## Source + +### Created by + +- @jiegillet + +### Based on + +Interview Question - https://reference.wolfram.com/language/ref/Flatten.html \ No newline at end of file diff --git a/gleam/flatten-array/gleam.toml b/gleam/flatten-array/gleam.toml new file mode 100644 index 0000000..132469c --- /dev/null +++ b/gleam/flatten-array/gleam.toml @@ -0,0 +1,12 @@ +name = "flatten_array" +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/flatten-array/manifest.toml b/gleam/flatten-array/manifest.toml new file mode 100644 index 0000000..072155d --- /dev/null +++ b/gleam/flatten-array/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/flatten-array/src/flatten_array.gleam b/gleam/flatten-array/src/flatten_array.gleam new file mode 100644 index 0000000..cc489a7 --- /dev/null +++ b/gleam/flatten-array/src/flatten_array.gleam @@ -0,0 +1,15 @@ +import gleam/list + +pub type NestedList(a) { + Null + Value(a) + List(List(NestedList(a))) +} + +pub fn flatten(nested_list: NestedList(a)) -> List(a) { + case nested_list { + Null -> [] + Value(a) -> [a] + List(l) -> list.flat_map(l, flatten) + } +} diff --git a/gleam/flatten-array/test/flatten_array_test.gleam b/gleam/flatten-array/test/flatten_array_test.gleam new file mode 100644 index 0000000..2cff1a9 --- /dev/null +++ b/gleam/flatten-array/test/flatten_array_test.gleam @@ -0,0 +1,115 @@ +import exercism/should +import exercism/test_runner +import flatten_array.{List, Null, Value} + +pub fn main() { + test_runner.main() +} + +pub fn empty_test() { + flatten_array.flatten(List([])) + |> should.equal([]) +} + +pub fn no_nesting_test() { + flatten_array.flatten(List([Value(0), Value(1), Value(2)])) + |> should.equal([0, 1, 2]) +} + +pub fn flattens_a_nested_array_test() { + flatten_array.flatten(List([List([List([])])])) + |> should.equal([]) +} + +pub fn flattens_array_with_just_integers_present_test() { + flatten_array.flatten( + List([ + Value(1), + List([Value(2), Value(3), Value(4), Value(5), Value(6), Value(7)]), + Value(8), + ]), + ) + |> should.equal([1, 2, 3, 4, 5, 6, 7, 8]) +} + +pub fn five_level_nesting_test() { + flatten_array.flatten( + List([ + Value(0), + Value(2), + List([ + List([Value(2), Value(3)]), + Value(8), + Value(100), + Value(4), + List([List([List([Value(50)])])]), + ]), + Value(-2), + ]), + ) + |> should.equal([0, 2, 2, 3, 8, 100, 4, 50, -2]) +} + +pub fn six_level_nesting_test() { + flatten_array.flatten( + List([ + Value(1), + List([ + Value(2), + List([List([Value(3)])]), + List([Value(4), List([List([Value(5)])])]), + Value(6), + Value(7), + ]), + Value(8), + ]), + ) + |> should.equal([1, 2, 3, 4, 5, 6, 7, 8]) +} + +pub fn null_values_are_omitted_from_the_final_result_test() { + flatten_array.flatten(List([Value(1), Value(2), Null])) + |> should.equal([1, 2]) +} + +pub fn consecutive_null_values_at_the_front_of_the_list_are_omitted_from_the_final_result_test() { + flatten_array.flatten(List([Null, Null, Value(3)])) + |> should.equal([3]) +} + +pub fn consecutive_null_values_in_the_middle_of_the_list_are_omitted_from_the_final_result_test() { + flatten_array.flatten(List([Value(1), Null, Null, Value(4)])) + |> should.equal([1, 4]) +} + +pub fn six_level_nest_list_with_null_values_test() { + flatten_array.flatten( + List([ + Value(0), + Value(2), + List([ + List([Value(2), Value(3)]), + Value(8), + List([List([Value(100)])]), + Null, + List([List([Null])]), + ]), + Value(-2), + ]), + ) + |> should.equal([0, 2, 2, 3, 8, 100, -2]) +} + +pub fn all_values_in_nested_list_are_null_test() { + flatten_array.flatten( + List([ + Null, + List([List([List([Null])])]), + Null, + Null, + List([List([Null, Null]), Null]), + Null, + ]), + ) + |> should.equal([]) +}