Diogo Souza da Silva diogok

tmux - terminal multiplexer

Managing tmux sessions:

$ tmux      # start tmux server
$ tmux at   # attach running sessions to a terminal
$ tmux ls   # list running tmux sessions

Sharing sessions between terminals:

$ tmux new -s session_name # make new named session

$ tmux at -t session_name # attach to exist session (allowing shared sessions)

Validação para cartão de crédito.

Bin e padrões para validação de cartão de crédito.

Bandeira	Começa com	Máximo de número	Máximo de número cvc
Visa	4	13,16	3
Mastercard	5	16	3

Simple module that makes gears with circular-shaped teeth. The gears maintain their shape even for extremely low teeth numbers up to 2. Parameters:

teeth: number of teeth.
step: width of one teeth (diameter of the circle).

Two gears produced with the same step will transfer movement, so one typically fixes a step for all the gears and varies teeth for each gear, which decides the radius and transfer ratio. Example:

Conventions

A = [xA, yA] is a point on the 2D plane. Same for B, C, ...
lengths are in any unit (ex: pixels)
code snippets are in JavaScript

Degrees to radians

angleRad = angleDeg * Math.PI / 180;

Wow. Stripped-down, reading-ready summary follows below, but here's the original link:

https://twitter.com/sarahmei/status/783340259073335296

The author, Sarah Mei (@sarahmei) has also registered liveablecode.com (no content yet).

[begin summary]

	;; Clutch provides a pretty comprehensive API, but I'm frustated that 95% of database
	;; interactions require using something other than the typical Clojure vocabulary of
	;; assoc/conj/dissoc/get/seq/reduce/etc, even though those semantics are entirely appropriate
	;; (modulo the whole stateful database thing).
	;;
	;; This is (the start of) an attempt to create a type to provide most of the
	;; functionality of Clutch with a more pleasant, concise API (it uses the Clutch API
	;; under the covers, and rare operations would generally remain accessible only
	;; at that lower level).
	;;

	# Given

	Given I am on [the] homepage
	Given I am on "url"

	# When

	When I go to [the] homepage
	When I go to "url"
	When I reload the page

	# let's assume the command is:
	# sshcd -v -q [email protected]:/path/to/file

	# grabs the last argument of command, the target: "[email protected]:/path/to/file
	t="${!#}"

	# command to run, which I've broken down line by line
	c=(
	"ssh"
	"-t" # force pseudo-tty allocation (http://www.openbsd.org/cgi-bin/man.cgi?query=ssh&sektion=1)

	// Usage:
	// Copy and paste all of this into a debug console window of the "Who is Hiring?" comment thread
	// then use as follows:
	//
	// query(term \| [term, term, ...], term \| [term, term, ...], ...)
	//
	// When arguments are in an array then that means an "or" and when they are seperate that means "and"
	//
	// Term is of the format:
	// ((-)text/RegExp) ( '-' means negation )

	(defn code-mirror
	"Create a code-mirror editor. The parameters:
	value-atom (reagent atom)
	when this changes, the editor will update to reflect it.
	options
	:style (reagent style map)
	will be applied to the container element
	:js-cm-opts
	options passed into the CodeMirror constructor
	:on-cm-init (fn [cm] -> nil)