# 使用 Homebrew 安装 aria2
brew install aria2
# 创建配置文件aria2.conf和空对话文件aria2.session
mkdir ~/.aria2 && cd ~/.aria2
touch aria2.conf
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常用的数字正则(严格匹配) | |
------------------------------ | |
正则 含义 | |
^[1-9]\d*$ 匹配正整数 | |
^-[1-9]\d*$ 匹配负整数 | |
^-?[1-9]\d*$ 匹配整数 | |
^[1-9]\d*|0$ 匹配非负整数(正整数 + 0) | |
^-[1-9]\d*|0$ 匹配非正整数(负整数 + 0) | |
^[1-9]\d*\.\d*|0\.\d*[1-9]\d*$ 匹配正浮点数 | |
^-([1-9]\d*\.\d*|0\.\d*[1-9]\d*)$ 匹配负浮点数 |