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$ curl -fsSL get.docker.com -o get-docker.sh && sh get-docker.sh

$ curl -fsSL get.docker.com -o get-docker.sh && sh get-docker.sh && sudo docker run -d --restart=unless-stopped -p 8080:8080 rancher/server

• Clean pkg cache
• Remove unused packages (orphans)
• Clean cache in /home
• remove old config files
• Find and Remove
  • duplicates
  • empty files
  • empty directories
• broken symlinks

This notes is written by Sheldon. You can find me with #iOSBySheldon in Github, Youtube, Facebook, etc.

Convert .mov/.MP4 to .gif

As a developer, I feel better to upload a short video when I create the pull request to show other viewers what I did in this PR. I tried .mov format directly got after finishing recording screen using Quicktime, however, gif offers preview in most web pages, and has smaller file size.

This is not limited to developer, anyone has this need can use this method to convert the files.

WWDC  2001  2002  2003                    2007  2008  2009
2010 2011 2012 2013 2014<

Comment to https://www.reddit.com/r/ProgrammingLanguages/comments/1cphrxp/is_this_a_sane_set_of_tokens_for_my_lexer_a_few/

Also, do you guys have any resources on algorithms on ASTs, for type checking, maybe about linear typing and borrow checking as well? That's assuming the AST is the place where I'm supposed to check this sort of stuff.

There are a number of different approaches to typechecking, so there isn't a single answer or direction to go. For systems that support strong type inference, there are two well-known approaches: Hindley-Milner (HM) and bidirectional (bidir) systems, and these approaches aren't entirely separate (HM is often put in bidirectional checking to help with generics). There is also the simpler unidirectional approach taken by older languages e.g. Java, and the simpler way of handling generics by annotating every generic function and datastructure.

Giving direction on typechecking is unfortunately difficult because it is opinionated, because there is a line to straddle with wh