{"id":18567856,"url":"https://github.com/invrtd-h/ffffff","last_synced_at":"2025-07-12T03:33:41.720Z","repository":{"id":61116749,"uuid":"533628175","full_name":"invrtd-h/ffffff","owner":"invrtd-h","description":"JS의 underscore 라이브러리를 그대로 C++로 구현하는 프로젝트입니다","archived":false,"fork":false,"pushed_at":"2022-10-25T13:29:03.000Z","size":3859,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"master","last_synced_at":"2025-05-15T20:49:27.868Z","etag":null,"topics":["cpp","cpp20","functional-programming"],"latest_commit_sha":null,"homepage":"","language":"C++","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/invrtd-h.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2022-09-07T06:02:01.000Z","updated_at":"2022-09-22T12:25:35.000Z","dependencies_parsed_at":"2023-01-20T12:06:09.888Z","dependency_job_id":null,"html_url":"https://github.com/invrtd-h/ffffff","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/invrtd-h/ffffff","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/invrtd-h%2Fffffff","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/invrtd-h%2Fffffff/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/invrtd-h%2Fffffff/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/invrtd-h%2Fffffff/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/invrtd-h","download_url":"https://codeload.github.com/invrtd-h/ffffff/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/invrtd-h%2Fffffff/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":264930683,"owners_count":23684913,"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":["cpp","cpp20","functional-programming"],"created_at":"2024-11-06T22:27:59.173Z","updated_at":"2025-07-12T03:33:41.347Z","avatar_url":"https://github.com/invrtd-h.png","language":"C++","readme":"# FFFFFF.cpp Project\n\nJS의 underscore 라이브러리를 C++로 그대로 구현하는 프로젝트입니다.\n\n왜 이름이 FFFFFF일까요? #ffffff는 흰색이기 때문입니다. 사실 별 의미 없습니다.\n\n### underscore.js 라이브러리\n\n함수형 프로그래밍을 지원하는 JS의 라이브러리입니다. \n\n## FFFFFF.cpp features\n\n### Namespace fff::tmf\n\n리턴 타입 추론에 쓰이는 템플릿 메타 함수들과 C++20 Concepts를 지원합니다.\n\n### Small Function Objects\n\n* IdentityAt\n* CopyAt\n* no_op_f\n* AlwaysConstant\n\n이름만 봐도 무엇을 하는 함수인지 유추할 수 있습니다!\n\n### Functions\n\n* _.each()\n* _.map()\n* _.filter(), _.reject()\n* _.some(), _.every(), _.none()\n\n### Higher Order Functions\n\n* _.once()\n* _.count()\n\n#### _.overload()\n\n 서로 다른 인자를 가진 여러 개의 함수를 묶어줍니다!\n\n```\nint main() {\n    auto print_str \n        = [](const std::string \u0026s) {std::cout \u003c\u003c s \u003c\u003c '\\n';};\n    \n    auto overloaded = fff::overload(\n            [](int n) { std::cout \u003c\u003c n \u003c\u003c '\\n'; },\n            [](double n) { std::cout \u003c\u003c n \u003c\u003c '\\n'; },\n            print_str\n    );\n    \n    overloaded(1); // 1\n    overloaded(4.9); // 4.9\n    overloaded(\"String\"); // String\n}\n```\n\n#### _.parallel()\n\n _.overload()와 비슷하지만, 함수의 순서가 보다 중요해집니다. 보다 앞에 있는 함수가 실행 가능하다면 뒤에 있는 함수가 적합하더라도 앞에 있는 함수를 실행시킵니다!\n\n```\nint main() {\n    auto print_str \n        = [](const std::string \u0026s) {std::cout \u003c\u003c s \u003c\u003c '\\n';};\n    \n    int r = 3;\n    \n    auto f = fff::parallel(\n            [r](int n) {std::cout \u003c\u003c n * 2 + r \u003c\u003c '\\n';},\n            print_str,\n            [r](double n) {std::cout \u003c\u003c n * 2 + r \u003c\u003c '\\n';}\n    );\n    \n    f(1); // 5\n    f(4.9); // 11 (NOT 12.8!!)\n    f(\"String\"); // String\n}\n```\n\n#### _.pipeline()\n\n 합성함수를 파이프라인 형식으로 지원합니다!\n\n```\ntemplate\u003cint N\u003e\nconstexpr auto add = [](int n) {return n + N;};\n\ntemplate\u003cint N\u003e\nconstexpr auto multiply = [](int n) {return n * N;};\n\nint main() {\n    auto g = fff::pipeline \u003e\u003e add\u003c3\u003e \u003e\u003e multiply\u003c5\u003e;\n    std::cout \u003c\u003c g(3) \u003c\u003c '\\n'; // 30 ( =(3+3)*5 )\n}\n```\n\n### Monads\n\n#### _.go(), _.stop\n\n 아무 기능도 없습니다! 하지만 파이프라인을 제공합니다. 함수에 접근할 때 무조건 operator()을 써야 한다는 생각을 버리세요! operator\u003e\u003e는 여러 번의 함수를 한꺼번에 적용해야 할 때, 보다 직관적인 표기법을 만들어줍니다.\n\n```\ntemplate\u003cint N\u003e\nconstexpr auto multiply = [](int n) {return n * N;};\n\nint main() {\n    int got = fff::go(1) \n            \u003e\u003e multiply\u003c3\u003e \n            \u003e\u003e multiply\u003c3\u003e\n            \u003e\u003e multiply\u003c3\u003e \n            \u003e\u003e multiply\u003c3\u003e \n            \u003e\u003e fff::stop; // 81\n}\n```\n\n#### _.maybe()\n\nSTL의 std::optional을 상속받았습니다. 값이 있을 수도 있고 없을 수도 있습니다.\n\n### Other utilities\n\n#### fff::AsSingle\\\u003cT\\\u003e\n\n싱글턴을 만들어 줍니다.","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Finvrtd-h%2Fffffff","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Finvrtd-h%2Fffffff","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Finvrtd-h%2Fffffff/lists"}