{"id":19595916,"url":"https://github.com/innovativeinventor/lambda-etudes","last_synced_at":"2025-10-05T07:39:50.497Z","repository":{"id":135191804,"uuid":"318555399","full_name":"InnovativeInventor/lambda-etudes","owner":"InnovativeInventor","description":"Little exercises in Haskell","archived":false,"fork":false,"pushed_at":"2020-12-06T02:15:54.000Z","size":16,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":3,"default_branch":"main","last_synced_at":"2025-01-09T07:20:46.520Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":"","language":"Haskell","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"gpl-3.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/InnovativeInventor.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2020-12-04T15:22:16.000Z","updated_at":"2023-03-02T00:45:42.000Z","dependencies_parsed_at":null,"dependency_job_id":"d4f39e1a-df00-42df-bf2d-1d8edff0501c","html_url":"https://github.com/InnovativeInventor/lambda-etudes","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/InnovativeInventor%2Flambda-etudes","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/InnovativeInventor%2Flambda-etudes/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/InnovativeInventor%2Flambda-etudes/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/InnovativeInventor%2Flambda-etudes/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/InnovativeInventor","download_url":"https://codeload.github.com/InnovativeInventor/lambda-etudes/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":240874366,"owners_count":19871691,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-11-11T08:49:28.729Z","updated_at":"2025-10-05T07:39:45.471Z","avatar_url":"https://github.com/InnovativeInventor.png","language":"Haskell","funding_links":[],"categories":[],"sub_categories":[],"readme":"## Lambda-etudes\nInspired from: https://github.com/norvig/pytudes\n\n\"An *étude* (a French word meaning *study*) is an instrumental musical composition, usually short, \nof considerable difficulty, and designed to provide practice material for perfecting a particular \nmusical skill.\" \u0026mdash; [Wikipedia](https://en.wikipedia.org/wiki/%C3%89tude)\n\nThis project is intended to derive common lambda calculus functions from the ground up with automatic testing (with QuickCheck) and Haskell's excellent type system.\nDesigned to be readable to non-Haskellers familiar with lambda calculus.\n\n[`etudes.hs`](/etudes.hs) contains all the preliminary etudes.\n\n## Running Tests\nTo run tests, load [`etudes.hs`](/etudes.hs) into `ghci` and run `runTests` like so:\n\n``` haskell\n\u003e\u003e\u003e :l etudes.hs\n\u003e\u003e\u003e runTests\n```\n\nSample output:\n\n``` shell\nGHCi, version 8.6.5: http://www.haskell.org/ghc/  :? for help\nPrelude\u003e :l etudes.hs \n[1 of 1] Compiling Main             ( etudes.hs, interpreted )\nOk, one module loaded.\n*Main\u003e runTests \n=== prop_zero from etudes.hs:24 ===\n+++ OK, passed 1 test.\n\n=== prop_one from etudes.hs:27 ===\n+++ OK, passed 1 test.\n\n=== prop_iszero from etudes.hs:34 ===\n+++ OK, passed 100 tests; 91 discarded.\n\n=== prop_succ from etudes.hs:41 ===\n+++ OK, passed 100 tests; 93 discarded.\n\n=== prop_plus from etudes.hs:44 ===\n+++ OK, passed 100 tests; 276 discarded.\n\n=== prop_pred from etudes.hs:50 ===\n+++ OK, passed 100 tests; 96 discarded.\n\n=== prop_numeralisinverseConversion from etudes.hs:70 ===\n+++ OK, passed 100 tests; 85 discarded.\n\n=== prop_boolisinverseConversion from etudes.hs:71 ===\n+++ OK, passed 100 tests.\n\nTrue\n*Main\u003e \n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Finnovativeinventor%2Flambda-etudes","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Finnovativeinventor%2Flambda-etudes","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Finnovativeinventor%2Flambda-etudes/lists"}