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[
  {
    "name": "ABS",
    "category": "Math and trigonometry",
    "description": "Returns the absolute value of a number"
  },
  {
    "name": "ACCRINT",
    "category": "Financial",
    "description": "Returns the accrued interest for a security that pays periodic interest"

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# if you remember current password:
mysql -u root -p
set password for 'root'@'localhost' = PASSWORD('your-new-password');
flush privileges;

# else:
# 1. stop mysql
# 2.
sudo /usr/local/mysql/bin/mysql_safe --skip-grant-tables
# 3. open new terminal tab

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let elemStyle = document.createElement('style')

elemStyle.innerHTML = `
h1:hover,
h2:hover,
h3:hover,
h4:hover,
h5:hover,
h6:hover,

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# 只 clone 最新的代码，不要 commits/tags...
git clone https://xxx/xxx.git --depth 1
# 这称为 shallow clone
# 如果后面又需要完整的仓库
git pull --unshallow


# === 恢复数据 ===
# reflog 可以查看你每次 git 操作后的 hash
git reflog 

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.top-box {
    box-shadow: inset 0 7px 9px -7px rgba(0,0,0,0.7);
}

.left-box {
    box-shadow: inset 7px 0 9px -7px rgba(0,0,0,0.7);
}

.right-box {
    box-shadow: inset -7px 0 9px -7px rgba(0,0,0,0.7);

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debounce

一系列的触发，停止触发（最后一次触发 xx 毫秒后没有再触发）后就执行。延后执行。

throttle

xx 秒内只允许执行1次，第一次触发时立即执行。

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Install and manage

Install Redis By Homebrew

brew install redis

To have launchd start redis now and restart at login:

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let domRect = elem.getBoundingClientRect();
/*
- top:    元素*上边界* 与 页面可视区域*上边界* 的距离；
- bottom: 元素*下边界* 与 页面可视区域*上边界* 的距离；
- right:  元素*右边界* 与 页面可视区域*左边界* 的距离；
- left:   元素*左边界* 与 页面可视区域*左边界* 的距离；

// IE9+
- width, 元素的宽；
- height, 元素的高；

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docker rmi $(docker images --filter "dangling=true" -q --no-trunc)

# if you got: "docker rmi" requires at least 1 argument.
# That means you don't have useless <none> images,
# maybe you can remove useless containers before.

# after 1.25, you can use the follow cmd.
# https://docs.docker.com/engine/reference/commandline/image_prune/
docker image prune

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安装 m2crypto 出现报错，通常是 swig 的原因，所以：

1、更新 swig

wget http://prdownloads.sourceforge.net/swig/swig-3.0.12.tar.gz
tar zxf swig-3.0.12.tar.gz
cd swig-3.0.12
./configure --prefix=/usr
make && make install