# Ruby

1. 快餐文分享:

   Ruby 3.0.0 Released

   <https://www.ruby-lang.org/en/news/2020/12/25/ruby-3-0-0-released/>

   迭代了近5年的Ruby 3.0 发布了, 主要的提升聚集在三方面: 性能 并发 类型

   Matz(作者) 声明 Ruby3 比 Ruby2 快3倍.

   性能方面: 主要引入了 JIT 即时编译技术, 算得上几乎所有现代语言的编译器内置功能了

   并发方面: Ruby 的实现居然是 Erlang 的 Actor-model 方案, 这就有点意思了

   并且对于 block 操作, Ruby 还引入了 Fiber Scheduler 设计..

   哈哈, async await 的思想算是现代语言标配了

   其余信息可以查阅上面链接\~
2. 分享个项目： \
   rails/kredis <https://github.com/rails/kredis>

   基于 Redis 封装的数据模型，可以理解为高度集成的 orm， 支持元编程的语言就是硬气。。
3. 分享篇文章： \
   Ruby 编程语言入门 \
   <https://hutusi.com/articles/ruby-quickstart>

   ```
   一些我欣赏的特性：
   ​
   a = []
   a << 1        # [1]
   a << 2 << 3   # [1, 2, 3]
   ​
   a = [1, 2, 3, 4, 5]
   a[-2]         # 4, 负数下标从最后一个倒数
   ​
   # 获取子数组 切片
   a[1, 2]       # [2, 3] 第一个下标数字表示起始下标，第二个表示子数组长度
   a[1, 0]       # [] 
   a[0...-1]     # [1, 2, 3, 4]
   ​
   3.times { action }
   ​
   a << 1 这种命令式的符号表达 看起来挺好玩的。
   ```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://thinking.simonaking.com/tags/pl/ruby.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.