mac 换机

1.迁移数据：https://support.apple.com/zh-cn/HT204350

2.备份数据  Paragon NTFS for Mac

3.抹掉数据重装系统 https://support.apple.com/zh-cn/HT204904

https://support.apple.com/zh-cn/ht201065


sudo chown -R $(whoami) /usr/local/Cellar

如何在mac ppt2016环境下自动导入图片生成ppt

如果windows环境，默认是直接支持的，参考文档http://www.office68.com/powerpoint/21104.html

mac下需要使用 Automator 其参考文档https://support.apple.com/zh-cn/guide/automator/welcome/mac 

mac2016移除了对automator 的支持，所以需要下载对应的插件；具体的参考https://answers.microsoft.com/en-us/mac/forum/macoffice2016-macpowerpoint/powerpoint-2016-and-automator-cant-see-ppt-in-the/464748a8-43f3-4c2c-badf-a76a644ea265?page=2

下载链接在https://onedrive.live.com/?authkey=%21AMh-grSm44uwOC0&cid=DE8ADB12A20968E4&id=DE8ADB12A20968E4%213226&parId=root&action=locate 

   

spark join的区别

http://apachesparkbook.blogspot.com/2015/12/join-leftouterjoin-rightouterjoin.html
https://stackoverflow.com/questions/40772209/how-to-replace-null-to-0-in-left-outer-join-in-spark-dataframe-v1-6

更改mac默认python的办法

问题：
Fatal Python error: PyThreadState_Get: no current thread

解决方法
https://stackoverflow.com/questions/15678153/homebrew-python-on-mac-os-x-10-8-fatal-python-error-pythreadstate-get-no-cu

sudo port select --list python

For my computer, it showed:

Available versions for python:
none
python25-apple
python26
python26-apple
python27 (active)
python27-apple

in which python27(by Macport) was currently active. Then,

sudo port select python python27-apple

评价指标

ndcg
https://blog.csdn.net/u011926899/article/details/52669180

R语言代理设置

Sys.setenv(http_proxy="http://user:password@proxy_server:port")

目前上述方式是比较有效的方法，即直接在console中进行代理的设置
具体参照 https://support.rstudio.com/hc/en-us/articles/200488488-Configuring-R-to-Use-an-HTTP-or-HTTPS-Proxy
https://support.rstudio.com/hc/en-us/community/posts/204007027-How-to-use-proxy-in-RStudio-on-Mac-OS-X-Yoesmite-

hive 一坑记录

Caused by: java.util.regex.PatternSyntaxException: Unclosed character class near

https://stackoverflow.com/questions/21816788/unclosed-character-class-error