From 02dd43f8f62a329c2c0a263f6b7715f6594d2984 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jo=C3=A3o=20Fernandes?= Date: Sun, 5 May 2024 12:01:36 -0300 Subject: [PATCH] [gleam] complete strain --- gleam/strain/.gitignore | 4 ++ gleam/strain/HELP.md | 32 ++++++++++ gleam/strain/README.md | 44 +++++++++++++ gleam/strain/gleam.toml | 12 ++++ gleam/strain/manifest.toml | 27 ++++++++ gleam/strain/src/strain.gleam | 15 +++++ gleam/strain/test/strain_test.gleam | 95 +++++++++++++++++++++++++++++ 7 files changed, 229 insertions(+) create mode 100644 gleam/strain/.gitignore create mode 100644 gleam/strain/HELP.md create mode 100644 gleam/strain/README.md create mode 100644 gleam/strain/gleam.toml create mode 100644 gleam/strain/manifest.toml create mode 100644 gleam/strain/src/strain.gleam create mode 100644 gleam/strain/test/strain_test.gleam diff --git a/gleam/strain/.gitignore b/gleam/strain/.gitignore new file mode 100644 index 0000000..170cca9 --- /dev/null +++ b/gleam/strain/.gitignore @@ -0,0 +1,4 @@ +*.beam +*.ez +build +erl_crash.dump diff --git a/gleam/strain/HELP.md b/gleam/strain/HELP.md new file mode 100644 index 0000000..d86ec20 --- /dev/null +++ b/gleam/strain/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/strain.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/strain/README.md b/gleam/strain/README.md new file mode 100644 index 0000000..7d2899f --- /dev/null +++ b/gleam/strain/README.md @@ -0,0 +1,44 @@ +# Strain + +Welcome to Strain on Exercism's Gleam Track. +If you need help running the tests or submitting your code, check out `HELP.md`. + +## Instructions + +Implement the `keep` and `discard` operation on collections. +Given a collection and a predicate on the collection's elements, `keep` returns a new collection containing those elements where the predicate is true, while `discard` returns a new collection containing those elements where the predicate is false. + +For example, given the collection of numbers: + +- 1, 2, 3, 4, 5 + +And the predicate: + +- is the number even? + +Then your keep operation should produce: + +- 2, 4 + +While your discard operation should produce: + +- 1, 3, 5 + +Note that the union of keep and discard is all the elements. + +The functions may be called `keep` and `discard`, or they may need different names in order to not clash with existing functions or concepts in your language. + +## Restrictions + +Keep your hands off that filter/reject/whatchamacallit functionality provided by your standard library! +Solve this one yourself using other basic tools instead. + +## Source + +### Created by + +- @natanaelsirqueira + +### Based on + +Conversation with James Edward Gray II - http://graysoftinc.com/ \ No newline at end of file diff --git a/gleam/strain/gleam.toml b/gleam/strain/gleam.toml new file mode 100644 index 0000000..a68bd00 --- /dev/null +++ b/gleam/strain/gleam.toml @@ -0,0 +1,12 @@ +name = "strain" +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/strain/manifest.toml b/gleam/strain/manifest.toml new file mode 100644 index 0000000..072155d --- /dev/null +++ b/gleam/strain/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/strain/src/strain.gleam b/gleam/strain/src/strain.gleam new file mode 100644 index 0000000..aa730f2 --- /dev/null +++ b/gleam/strain/src/strain.gleam @@ -0,0 +1,15 @@ +pub fn keep(list: List(t), predicate: fn(t) -> Bool) -> List(t) { + case list { + [] -> [] + [head, ..tail] -> { + case predicate(head) { + True -> [head, ..keep(tail, predicate)] + False -> keep(tail, predicate) + } + } + } +} + +pub fn discard(list: List(t), predicate: fn(t) -> Bool) -> List(t) { + keep(list, fn(t) { !predicate(t) }) +} diff --git a/gleam/strain/test/strain_test.gleam b/gleam/strain/test/strain_test.gleam new file mode 100644 index 0000000..6d2bd31 --- /dev/null +++ b/gleam/strain/test/strain_test.gleam @@ -0,0 +1,95 @@ +import exercism/test_runner +import gleam/int +import gleam/list +import gleam/string +import strain + +pub fn main() { + test_runner.main() +} + +pub fn keep_on_empty_list_returns_empty_list_test() { + let assert [] = strain.keep([], fn(_) { True }) +} + +pub fn keeps_everything_test() { + let assert [1, 2, 3] = strain.keep([1, 2, 3], fn(_) { True }) +} + +pub fn keeps_nothing_test() { + let assert [] = strain.keep([1, 2, 3], fn(_) { False }) +} + +pub fn keeps_first_and_last_test() { + let assert [1, 3] = strain.keep([1, 2, 3], int.is_odd) +} + +pub fn keeps_neither_first_nor_last_test() { + let assert [2] = strain.keep([1, 2, 3], int.is_even) +} + +pub fn keeps_strings_starting_with_z_test() { + let assert ["zebra", "zombies", "zelot"] = + strain.keep( + ["apple", "zebra", "banana", "zombies", "cherimoya", "zelot"], + fn(word) { string.starts_with(word, "z") }, + ) +} + +pub fn keeps_lists_containing_the_number_5_test() { + let list = [ + [1, 2, 3], + [5, 5, 5], + [5, 1, 2], + [2, 1, 2], + [1, 5, 2], + [2, 2, 1], + [1, 2, 5], + ] + + let assert [[5, 5, 5], [5, 1, 2], [1, 5, 2], [1, 2, 5]] = + strain.keep(list, fn(row) { list.any(row, fn(n) { n == 5 }) }) +} + +pub fn discard_on_empty_list_returns_empty_list_test() { + let assert [] = strain.discard([], fn(_) { True }) +} + +pub fn discards_everything_test() { + let assert [] = strain.discard([1, 2, 3], fn(_) { True }) +} + +pub fn discards_nothing_test() { + let assert [1, 2, 3] = strain.discard([1, 2, 3], fn(_) { False }) +} + +pub fn discards_first_and_last_test() { + let assert [2] = strain.discard([1, 2, 3], int.is_odd) +} + +pub fn discards_neither_first_nor_last_test() { + let assert [1, 3] = strain.discard([1, 2, 3], int.is_even) +} + +pub fn discards_strings_starting_with_z_test() { + let assert ["apple", "banana", "cherimoya"] = + strain.discard( + ["apple", "zebra", "banana", "zombies", "cherimoya", "zelot"], + fn(word) { string.starts_with(word, "z") }, + ) +} + +pub fn discards_lists_containing_the_number_5_test() { + let list = [ + [1, 2, 3], + [5, 5, 5], + [5, 1, 2], + [2, 1, 2], + [1, 5, 2], + [2, 2, 1], + [1, 2, 5], + ] + + let assert [[1, 2, 3], [2, 1, 2], [2, 2, 1]] = + strain.discard(list, fn(row) { list.any(row, fn(n) { n == 5 }) }) +}