1. 打开 Finder, 然后菜单 go -> Computer 或者 使用它的快捷键

2. 打开文件夹: Macintosh HD -> Library -> Preferences 删除里面的文件(如果有的话):
   "com.apple.dock.extra.plist" 和 "com.apple.dock.plist"

3. 重启电脑

1. 为什么投资人不喜欢人型机器人?越像人,人类越把它和人做比较,结果技术的不足越容易体现,在"缺点放大镜"下,它就变的非常愚蠢. 反而那些带有人工智能的家电, 能得到人的长期接受. --- 人的类比心理?
2. 如何定义人工智能? 智慧大于18岁成人? 还是某些特定方面比人类聪明?
3. 人类是怎么思考的? 人工智能又是怎么思考的? 如果结果是对的, 又何必拘泥于方式? 飞机并非最后仿照鸟拍翅膀.
4. 人类: 认识 -> 研究 -> 推理. 机器: 学习 -> 分类, 归纳, 总结 -> 推理, 人类纠偏.

Run Your JavaScript is a chrome extension, with it you can build your chrome extension features.

what's it?
it is a chrome extension to run your own Javascript with extension's advantages.

why use it?

1. it can simplify your development. Normally you access third party APIs in your web server by given user name or token, and your web page call your web server API, but with this extension, you can call third party APIs on chrome, like web page access them, no need extra user name & token, just login on third party web page;
2. use chrome proxy automatically, especially with 2FA authentication proxy.
3. Access 3rd party API without Cross-Origin Resource Sharing issue.

how use it?
write your Javascript and put it on your web server, then put the Javascript link in this extention, and give it a name, then you can expect it to run.

is it safe?
Yes, it is absolutely safe, you can view all the source code on github;

source code:
https://github.com/manecocomph/RunYourJavaScript

find it in chrome store: https://chrome.google.com/webstore/detail/run-your-javascript/aiokpplkfhfbijcmbpgpbomigegncfab

1. 大O表示法都是指的 log₂ 对数O(1)或O(N)或O(log₂N),最糟情况用的次数, 大O符号:是用于描述函数渐近行为的数学符号;
2. 二分查找 有序的列表
3. 数组和链表 对比 增删改查
4. while 循环可能更快,但是递归更易读,递归使栈更深;

tcpdump - dump traffic on a network

tcpdump [ -AbdDefhHIJKlLnNOpqStuUvxX# ] [ -B buffer_size ]

• -w 写入文件
• -r 从文件读入 -F 读入的文件
• -V 从一批文件读入
• -c 处理多少 package
• -D or --list-interfaces 列出接口列表
• -i --interface= 制定接口
• -K --dont-verify-checksums 不验证 checksum 加快速度
• -n 不转换数字为地址
• -Q --direction=in|out|inout

samples here
sudo tcpdump host 10.102.196.239 -w /tmp/tcpdump.log.cap
sudo tcpdump -C 50 -W 10 -w /tmp/tcp.cap ##循环写 10个文件, 每个 50M
sudo tcpdump'(host 10.135.250.186 or host 10.189.248.238 or host 10.20.170.138 or host 10.21.233.128 or port 53)' -w /tmp/tcp.cap # 多个 IP 或者 DNS 查询

ping:
sudo tcpdump -e icmp[icmptype] == 8 //ping echo request
sudo tcpdump -e icmp[icmptype] == 0 //ping echo reply