{"id":39353894,"url":"https://github.com/skydoves/kotlin-deep-dive","last_synced_at":"2026-01-18T02:34:49.978Z","repository":{"id":331745792,"uuid":"1111544816","full_name":"skydoves/kotlin-deep-dive","owner":"skydoves","description":"Kotlin Book: An in-depth look at the principles and internal mechanisms underlying Kotlin fundamentals.","archived":false,"fork":false,"pushed_at":"2026-01-11T08:03:30.000Z","size":2291,"stargazers_count":25,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"main","last_synced_at":"2026-01-11T09:28:11.460Z","etag":null,"topics":["android","book","coroutines","interview","kotlin","kotlin-compiler","kotlinx","skydoves"],"latest_commit_sha":null,"homepage":"https://kotlin.skydoves.me/","language":null,"has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"bsd-3-clause","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/skydoves.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,"zenodo":null,"notice":null,"maintainers":null,"copyright":null,"agents":null,"dco":null,"cla":null}},"created_at":"2025-12-07T06:37:48.000Z","updated_at":"2026-01-09T06:53:15.000Z","dependencies_parsed_at":null,"dependency_job_id":null,"html_url":"https://github.com/skydoves/kotlin-deep-dive","commit_stats":null,"previous_names":["skydoves/kotlin-deep-dive"],"tags_count":2,"template":false,"template_full_name":null,"purl":"pkg:github/skydoves/kotlin-deep-dive","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/skydoves%2Fkotlin-deep-dive","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/skydoves%2Fkotlin-deep-dive/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/skydoves%2Fkotlin-deep-dive/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/skydoves%2Fkotlin-deep-dive/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/skydoves","download_url":"https://codeload.github.com/skydoves/kotlin-deep-dive/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/skydoves%2Fkotlin-deep-dive/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":28526574,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-01-18T00:39:45.795Z","status":"online","status_checked_at":"2026-01-18T02:00:07.578Z","response_time":98,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"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":["android","book","coroutines","interview","kotlin","kotlin-compiler","kotlinx","skydoves"],"created_at":"2026-01-18T02:34:49.444Z","updated_at":"2026-01-18T02:34:49.970Z","avatar_url":"https://github.com/skydoves.png","language":null,"funding_links":[],"categories":[],"sub_categories":[],"readme":"\u003cimg width=\"1095\" height=\"460\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/54541511-e4ae-41bb-8f11-3398dcbb4f12\" /\u003e\n\n**Unlocking the Secrets Behind Kotlin's Design.**\n\n**[Practical Kotlin Deep Dive](https://kotlin.skydoves.me/)** is more than a technical reference, it's your guide to understanding the soul of Kotlin. This comprehensive journey takes you from language fundamentals through Coroutines, Flow, and Kotlin Multiplatform, answering not just \"how\" but \"why\" Kotlin was designed the way it is. With 70+ deep-dive topics, you'll explore real implementations from Kotlin' source code and decode the bytecode that powers your applications.\n\nFor developers ready to evolve from practitioners to experts, the \"Pro Tips for Mastery\" sections reveal the hidden mechanics that separate those who use Kotlin from those who truly understand it. Each chapter dissects compiler decisions, KEEP proposals, and internal APIs—knowledge that transforms how you architect solutions. The material bridges theory and practice, with source code references and bytecode analysis that ground every concept in reality.\n\nThis book is crafted to be your technical companion, whether you're building production Android/Backend applications, exploring Kotlin Multiplatform, or simply curious about what happens beneath the surface. It embraces the philosophy that true mastery comes from understanding foundations, empowering you to write code with intention and debug with confidence.\n\n— **[Jaewoong Eum (skydoves)](https://github.com/skydoves/)**\n\n## 📚 Where to Read\n\n- [Practical Kotlin Deep Dive](https://kotlin.skydoves.me/)\n- [Read on Gumroad](https://skydoves.gumroad.com/l/kotlin-deep-dive)\n- [Read on Leanpub](https://leanpub.com/kotlin-deep-dive)\n\n## 🤝 Testimonial\n\n\u003cimg width=\"1057\" height=\"960\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/27bec512-a26b-481e-893e-e91245e341a9\" /\u003e\n\n## ⏳ Timeline \u0026 Milestone\n\n- 2026.01.13 - Published [Hindi edition](https://kotlin.skydoves.me/hi.html) 🇮🇳\n- 2026.01.12 - Reached 200 copies sold 🎉\n- 2026.01.11 - Published [Indonesian edition](https://kotlin.skydoves.me/id.html) 🇮🇩\n- 2026.01.11 - Published [Chinese edition](https://kotlin.skydoves.me/zh.html) 🇨🇳\n- 2026.01.06 - Reached 100 copies sold 🎉\n- 2026.01.03 - Published the first edition\n\n## 💖 Sponsors\n\n\u003ca href=\"https://coderabbit.link/Jaewoong\" target=\"_blank\"\u003e \u003cimg width=\"300\" alt=\"coderabbit\" src=\"https://github.com/user-attachments/assets/9823e1d3-8467-4d4d-8a53-94b3c0adc630\" /\u003e\u003c/a\u003e\n\n\u003ca href=\"https://kotlinweekly.net/?utm_campaign=Jaewoong\" target=\"_blank\"\u003e \u003cimg width=\"300\" alt=\"Kotlin Weekly\" src=\"https://github.com/user-attachments/assets/614122a5-f1f1-436e-a77e-82803072728b\" /\u003e\u003c/a\u003e\n\n\u003ca href=\"https://www.android.skydoves.me/\"\u003e\n\u003cimg src=\"https://github.com/user-attachments/assets/e014ce01-3461-40af-bb2a-eb44f3f55f36\" width=\"13%\" align=\"right\"/\u003e\n\u003c/a\u003e\n\n## 📘 Manifest Android Interview\n\n[Manifest Android Interview](https://www.android.skydoves.me/) is a comprehensive guide designed to enhance your Android development expertise through 108 interview questions with detailed answers, 162 additional practical questions, and 50+ \"Pro Tips for Mastery\" sections. The interview questions primarily focus on Android development—including the Framework, UI, Jetpack Libraries, and Business Logic—as well as Jetpack Compose, covering Fundamentals, Runtime, and UI.\n\n## 🕊️ Dove Letter\n\n\u003ca href=\"https://doveletter.skydoves.me/\"\u003e\n\u003cimg src=\"https://github.com/user-attachments/assets/3ecd2a7b-9713-40cd-8817-fa568271cefa\" width=\"13%\" align=\"right\"/\u003e\n\u003c/a\u003e\n\nIf you're eager to dive deeper into Kotlin and Android, explore [Dove Letter](https://doveletter.skydoves.me/), a private subscription repository where you can learn, discuss, and share knowledge. To get more details about this unique opportunity, check out the [Learn Kotlin and Android With Dove Letter](https://medium.com/@skydoves/learn-kotlin-and-android-with-dove-letter-26265da11903) article.\n\n## Find this repository useful? :heart:\n\nSupport it by joining __[stargazers](https://github.com/skydoves/kotlin-deep-dive/stargazers)__ for this repository. :star: \u003cbr\u003e\nAlso, __[follow me](https://github.com/skydoves)__ on GitHub for my next creations! 🤩\n\n# License\n```xml\nCopyright (c) skydoves (Jaewoong Eum) All rights reserved.\n\nRedistribution and use in source and binary forms, with or without\nmodification, are permitted provided that the following conditions are met:\n\n* Redistributions of source code must retain the above copyright notice, this\n  list of conditions and the following disclaimer.\n\n* Redistributions in binary form must reproduce the above copyright notice,\n  this list of conditions and the following disclaimer in the documentation\n  and/or other materials provided with the distribution.\n\n* Neither the name of data-accessor nor the names of its\n  contributors may be used to endorse or promote products derived from\n  this software without specific prior written permission.\n\nTHIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\"\nAND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\nIMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\nDISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE\nFOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\nDAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR\nSERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER\nCAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,\nOR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\nOF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fskydoves%2Fkotlin-deep-dive","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fskydoves%2Fkotlin-deep-dive","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fskydoves%2Fkotlin-deep-dive/lists"}