Alfred Tso alfredtso

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

What is the appeal of dynamically-typed languages?

Kris Nuttycombe asks:

I genuinely wish I understood the appeal of unityped languages better. Can someone who really knows both well-typed and unityped explain?

I think the terms well-typed and unityped are a bit of question-begging here (you might as well say good-typed versus bad-typed), so instead I will say statically-typed and dynamically-typed.

I'm going to approach this article using Scala to stand-in for static typing and Python for dynamic typing. I feel like I am credibly proficient both languages: I don't currently write a lot of Python, but I still have affection for the language, and have probably written hundreds of thousands of lines of Python code over the years.

Processing JSON using jq

jq is useful to slice, filter, map and transform structured json data.

Installing jq

On Mac OS

brew install jq

Editing remote files in Vim with SSH

Configure SSH

In ~/.ssh/config, include the lines:
```
Host *
ControlPath ~/.ssh/sockets/%r@%h-%p
```

% VXLAN lab based on OpenVSwitch and LXD containers

Preamble

The very first idea when I started writing this lab was to illustrate the Virtual Extensible LAN (VXLAN) technology. Now that OpenVSwitch configuration is smoothely integrated in the Debian networking configuration files, this should have resulted in somewhat easy-to-read gist.

	#Mounting the share is a 2 stage process:
	# 1. Create a directory that will be the mount point
	# 2. Mount the share to that directory

	#Create the mount point:
	mkdir share_name

	#Mount the share:
	mount_smbfs //username:[email protected]/share_name share_name/

	--langdef=less
	--langmap=less:.less
	--regex-less=/^[ \t&]*#([A-Za-z0-9_-]+)/\1/i,id,ids/
	--regex-less=/^[ \t&]*\.([A-Za-z0-9_-]+)/\1/c,class,classes/
	--regex-less=/^[ \t]*(([A-Za-z0-9_-]+[ \t\n,]+)+)\{/\1/t,tag,tags/
	--regex-less=/^[ \t]*@media\s+([A-Za-z0-9_-]+)/\1/m,media,medias/
	--regex-less=/^[ \t]*(@[A-Za-z0-9_-]+):/\1/v,variable,variables/
	--regex-less=/\/\/[ \t](FIXME\|TODO)[ \t]\:(.)/\1/T,Tag,Tags/

	--langdef=scss

	--- Actions ---
	$Copy <M-C>
	$Cut <M-X> <S-Del>
	$Delete <Del> <BS> <M-BS>
	$LRU
	$Paste <M-V>
	$Redo <M-S-Z> <A-S-BS>
	$SearchWeb <A-S-G>
	$SelectAll <M-A>
	$Undo <M-Z>