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Dart oss beginners course

Skill Python51888/StudyDart-Skills/skills/dart-open-source-projects/dart-oss-beginners-course

学习 Yczar/dart-for-beginners-course 开源项目,掌握 Dart 语言基础要素(变量、操作符、控制流、函数、导库),通过实际课程代码巩固语法知识。From its SKILL.md

Install
npx -y skills add Python51888/StudyDart-Skills --skill dart-oss-beginners-course

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

2 things to look at

  • 3 stars3 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.
  • runs commandsInstructs the agent to run 5 commands, including `git clone https://github.com/Yczar/dart-for-beginners-course.git` and 4 more.

SKILL.md

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学习 Dart 初学者课程项目

Contents

项目概览

项目名称: dart-for-beginners-course 作者: Yczar GitHub: https://github.com/Yczar/dart-for-beginners-course Stars: 59 | 难度: 入门级

这是配套 Dart 初学者视频课程的全部代码仓库,包含视频中使用的每一个代码片段。项目覆盖了 Dart 语言的所有基础要素,是最适合零基础入门的纯 Dart 开源项目。

与 dart-fundamentals 的关联

该项目是 dart-fundamentals 技能的最佳实践案例。项目中的代码直接展示了以下核心概念:

dart-fundamentals 主题项目对应内容
变量与类型推断var / final / const 使用示例
操作符算术、比较、空安全操作符
控制流if-else / switch / for / while
函数命名参数、箭头语法、匿名函数
库与导入import / export / show / hide

项目结构导读

dart-for-beginners-course/
├── lib/                  # 核心课程代码
├── bin/                  # 可运行入口
├── test/                 # 测试文件
└── pubspec.yaml          # 项目依赖配置

核心知识点覆盖

基础语法

void main() {
  // 变量声明
  var name = 'Dart';
  final age = 10;
  const pi = 3.14;

  // 控制流
  for (var i = 0; i < 5; i++) {
    print('Count: $i');
  }

  // 函数定义
  int add(int a, int b) => a + b;
  print(add(2, 3));
}

空安全

String? maybeNull;
String value = maybeNull ?? 'default';

int? result = int.tryParse('123');
if (result != null) {
  print('Parsed: ${result * 2}');
}

Workflow: 通过项目学习 Dart 基础

Task Progress

  • Step 1: 克隆项目。 git clone https://github.com/Yczar/dart-for-beginners-course.git 获取源码。
  • Step 2: 安装依赖。 在项目根目录运行 dart pub get
  • Step 3: 运行分析器。 执行 dart analyze 确认代码无错误。
  • Step 4: 逐文件阅读。lib/ 目录开始,配合 dart.cn 文档对照理解每个语法点。
  • Step 5: 动手修改。 每学习一个概念,修改代码中的值或逻辑,观察结果变化。
  • Step 6: 运行测试。 执行 dart test 验证改动未破坏原有逻辑。
  • Step 7: 扩展练习。 为项目添加新的 Dart 文件,实现学习过的语法特性。
  • Step 8: Feedback Loop。 修改代码 → dart run 运行 → 观察输出 → 调试修正 → 继续。

条件逻辑

  • 如果刚接触 Dart: 从变量声明和基本类型开始,不要跳过高阶内容。
  • 如果遇到不明白的语法: 使用 dart-fundamentals 技能查阅对应的语法说明。
  • 如果代码运行报错: 仔细阅读错误信息,使用 dart analyze 获取静态分析提示。
  • 如果需要理解某个概念的原理: 前往 dart.cn 文档查看相关章节。

Examples

从项目中学到的典型代码模式

class Person {
  final String name;
  final int age;

  const Person({required this.name, required this.age});

  String describe() => '$name is $age years old';

  factory Person.fromMap(Map<String, dynamic> map) {
    return Person(
      name: map['name'] as String,
      age: map['age'] as int,
    );
  }
}

void main() {
  final alice = Person(name: 'Alice', age: 30);
  print(alice.describe());

  final bob = Person.fromMap({'name': 'Bob', 'age': 25});
  print(bob.describe());
}

结合 dart-fundamentals 的延伸练习

List<int> filterPositive(List<int> numbers) {
  return [for (final n in numbers) if (n > 0) n * n];
}

bool isPrime(int n) {
  if (n < 2) return false;
  for (var i = 2; i * i <= n; i++) {
    if (n % i == 0) return false;
  }
  return true;
}

What ships with it

Read from the repository

Just SKILL.md. No reference files, no scripts.

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