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System Programming 2021 Spring
### 2.3. 正则
- 完成[LeetCode: 193. Valid Phone Numbers](https://leetcode-cn.com/problems/valid-phone-numbers/)(体会`grep -E`, `grep -P`, `egrep`, `awk`等的差异)
2.4. 文件读入
- 完成[LeetCode: 195. Tenth Line](https://leetcode.com/problems/valid-phone-numbers/),给出你的代码和 AC 截图。(提示:[怎么读取每一行](http://blog.sina.com.cn/s/blog_605f5b4f0101b0sd.html))
两个网址是一样的
关于题目中的描述
### 2.6. 综合实验
...
- 使用用法:`./addowner 目录名称`。(若无目录名称这一参数,则默认为当前目录)
...
建议考虑用户输入的目录名称末尾可能有/
的情况。
例如
DIR_INPUT=${1-${PWD}}
DIR=$(echo ${DIR_INPUT} | sed 's/\/$//')
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🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
An Open Source Machine Learning Framework for Everyone
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Bring data to life with SVG, Canvas and HTML. 📊📈🎉
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
Some thing interesting about web. New door for the world.
A server is a program made to process requests and deliver data to clients.
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Some thing interesting about visualization, use data art
Some thing interesting about game, make everyone happy.
We are working to build community through open source technology. NB: members must have two-factor auth.
Open source projects and samples from Microsoft.
Google ❤️ Open Source for everyone.
Alibaba Open Source for everyone
Data-Driven Documents codes.
China tencent open source team.