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Java基础入门第7问 单个char型变量不一定能存储一个汉字

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见[java.lang Class Character](https://docs.oracle.com/javase/7/docs/api/java/lang/Character.html) 单个char型变量能保存的16个比特代表的Basic Multilingual Plane中，只有少数几组是CJK的比如汉字笔画和标点符号 而UTF-16采用的编码中大部分汉字都需要两个16-bit code units来表示，也就是32比特

[RFC] GC: Both Stop-the-World and On-the-fly

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Draft PR: #4180 ## Summary I propose we implement a cycle collector for our rustPython RefCount garbage collection system based on Bacon etc.'s work in this two paper: - [Concurrent...

feat: add `rate()` udf

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Add a `rate()` udf that calc rate of a Monotonic increase counter over its time. Does NOT support reset yet

(READY FOR REVIEW)Garbage collect: A stop-the-world cycle collector

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That might be extend to be a on-the-fly version. Based on #4158 # Summary of GC Algorithm the algorithm store a buffer of object thats' "possible roots" of garbage cycles(i.e....

## Summary Releated static is - PyNumberMethod - PyMappingMethod - PySequenceMethod for now, they are using AtomicCell for storing methods, however, `crossbeam-utils` 0.8.10 make AtomicCell must impl Drop(Because internally it's...

Tracking issue for dataflow framework

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### What problem does the new feature solve? Being able to do simple continuous aggregation. ### What does the feature do? - not a complete streaming-processing system. Only a must...

chore: use full path for `location!()` macro

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use full path of `snafu::Location` for `location!()` macro

chore: add a compile cfg for python in cmd package

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I hereby agree to the terms of the [GreptimeDB CLA](https://github.com/GreptimeTeam/.github/blob/main/CLA.md). ## Refer to a related PR or issue link (optional) ## What's changed and what's your intention? add a "python"...

Tracking Issue: Improve flow functionality

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### What type of enhancement is this? Other ### What does the enhancement do? ## v0.9 TODO List - [x] reuse available scalar function from DataFusion to expand scalar function...

fix: use `is_ascii_alphabetic`

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I hereby agree to the terms of the [GreptimeDB CLA](https://github.com/GreptimeTeam/.github/blob/main/CLA.md). ## Refer to a related PR or issue link (optional) [#4694](https://github.com/GreptimeTeam/greptimedb/issues/4696) ## What's changed and what's your intention? use `is_ascii_alphabetic`...