diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json index e6f4e16..d616d82 100644 --- a/.obsidian/workspace.json +++ b/.obsidian/workspace.json @@ -34,45 +34,9 @@ }, "pinned": true } - }, - { - "id": "0c4cc0216ea83049", - "type": "leaf", - "state": { - "type": "markdown", - "state": { - "file": "04. Programming/Kotlin/AtomicBoolean.md", - "mode": "source", - "source": true - } - } - }, - { - "id": "6fe3a34cb01785c6", - "type": "leaf", - "state": { - "type": "markdown", - "state": { - "file": "03. 專注Study/Android/Android programming.md", - "mode": "source", - "source": true - } - } - }, - { - "id": "02d3631a7d6b4afa", - "type": "leaf", - "state": { - "type": "markdown", - "state": { - "file": "04. Programming/Kotlin/AtomicBoolean.md", - "mode": "source", - "source": true - } - } } ], - "currentTab": 4 + "currentTab": 1 } ], "direction": "vertical" @@ -130,7 +94,7 @@ "state": { "type": "backlink", "state": { - "file": "04. Programming/Kotlin/AtomicBoolean.md", + "file": "00. Inbox/01. TODO.md", "collapseAll": false, "extraContext": false, "sortOrder": "alphabetical", @@ -166,7 +130,7 @@ "state": { "type": "outline", "state": { - "file": "04. Programming/Kotlin/AtomicBoolean.md" + "file": "00. Inbox/01. TODO.md" } } } @@ -192,22 +156,23 @@ "periodic-notes:Open today": false } }, - "active": "02d3631a7d6b4afa", + "active": "3b4577823cedf427", "lastOpenFiles": [ - "03. 專注Study/Android/MediaCodec.md", + "04. Programming/Kotlin/AtomicBoolean.md", "03. 專注Study/Android/Android programming.md", + "01. 個人/00. Informations/Datas.md", + "03. 專注Study/C++/C++20.md", + "03. 專注Study/Android/MediaCodec.md", "03. 專注Study/Android/Android External Storage - Read, Write, Save File.md", "03. 專注Study/Android/ADB 取得 APK 的 icon.md", "attachments/android_mediacodec_life_cycle.png", "attachments/android_mediacodec_flow.png", - "04. Programming/Kotlin/AtomicBoolean.md", "04. Programming/Kotlin/class.md", "04. Programming/Kotlin/`compareAndSet`.md", "00. Inbox/01. TODO.md", "04. Programming/Kotlin/run, let, with, also 和 apply.md", "05. 資料收集/軟體工具/git/tag.md", "05. 資料收集/讀書筆記/20230206 - 卡片盒筆記.md", - "01. 個人/00. Informations/Datas.md", "03. 專注Study/Android/ADB.md", "02. 工作/01. Logitech/Sentinel.md", "02. 工作/01. Logitech/Tiny.md", @@ -224,7 +189,6 @@ "01. 個人/01. Daily/2023/02", "02. 工作/01. Logitech/QA Sustaining Automation.md", "01. 個人/01. Daily/2023/02/2023-02-22(週三).md", - "00. Inbox/Habit Tracker.md", - "01. 個人/01. Daily/2023/02/2023-02-12(週日).md" + "00. Inbox/Habit Tracker.md" ] } \ No newline at end of file diff --git a/00. Inbox/01. TODO.md b/00. Inbox/01. TODO.md index 77a502e..75f79c0 100644 --- a/00. Inbox/01. TODO.md +++ b/00. Inbox/01. TODO.md @@ -1,5 +1,10 @@ # ME ## 一般 +- [ ] 深入Android programming + - 參考：[Modern Android App Development in 2023 | by Jorge Luis Castro Medina | Medium](https://devjorgecastro.medium.com/modern-android-app-development-in-2023-ff445d3652b4) + - [ ] 課程：[Android Compose 教學課程  |  Android Developers](https://developer.android.com/jetpack/compose/tutorial?hl=zh-tw) + - [ ] [適用於 Android 開發人員的 Jetpack Compose  |  Android Developers](https://developer.android.com/courses/jetpack-compose/course?hl=zh-tw) + - [ ] [Getting Started with CameraX](https://developer.android.com/codelabs/camerax-getting-started#1) - [ ] 想買定焦鏡 - [ ] [XF18mmF2 R](https://www.fujifilm.com.tw/personal/digitalcamera/fujinon_lens_xf18mmf2_r/index.html) - 公司貨 $18000；[FUJINON XF18mm F2 R 鏡頭 - PChome 24h購物](https://24h.pchome.com.tw/prod/ABAQ07-A69947577) diff --git a/03. 專注Study/C++/C++20.md b/03. 專注Study/C++/C++20.md new file mode 100644 index 0000000..dca3c17 --- /dev/null +++ b/03. 專注Study/C++/C++20.md @@ -0,0 +1,97 @@ +## Modules + +Modules provide a new way to organize and manage large codebases, helping to improve build times, reduce code duplication, and increase modularity. +```cpp +// Example: math.cppm +export module math; + +export int square(int x) { + return x * x; +} + +export int cube(int x) { + return x * x * x; +} + +// Example: main.cpp +import math; + +int main() { + int result = math::square(5); + // result = 25 + int result2 = math::cube(5); + // result2 = 125 +} +``` + +## Concepts + +Concepts provide a way to specify **_constraints_** on templates, making it easier to write **_generic_** code that works with a wide range of types. +```cpp +template +concept Addable = requires(T a, T b) { + { a + b } -> T; +}; + +template +T add(T a, T b) { + return a + b; +} + +int main() { + int x = 1, y = 2; + auto result = add(x, y); + // result = 3 +} +``` + +## Ranges + +Ranges provide a new way to manipulate **_sequences_** of data in C++, making it easier to write clean, readable, and efficient code. +```cpp +#include +#include + +int main() { + std::vector v{1, 2, 3, 4, 5}; + auto even = v | std::ranges::views::filter([](int x) { return x % 2 == 0; }); + for (int x : even) { + std::cout << x << '\n'; + } +} +``` + +## Contract Programming + +Contract programming allows developers to specify **_preconditions_**, **_postconditions_**, and **_assertions_** in their code, making it easier to **catch** bugs early and reduce the number of runtime errors. +```cpp +#include + +[[nodiscard]] int foo() { + return 42; +} + +int main() { + int x = foo(); + std::cout << x << '\n'; +} +``` + +## Improved Template Metaprogramming + +C++20 includes several imrovements to the way templates can be used in C++, making it easier to write **generic** code that can be used with a wide range of types. + +```cpp +#include + +template +struct is_integral : std::false_type {}; + +template <> +struct is_integral : std::true_type {}; + +int main() { + static_assert(is_integral::value, ""); + static_assert(!is_integral::value, ""); +} +``` \ No newline at end of file