Guillermo C. Martínez telekosmos

Operation	Input	Result	Notes
map	`F[A]` , `A => B`	`F[B]`	Functor
apply	`F[A]` , `F[A => B]`	`F[B]`	Applicative
(fa, fb, ...).mapN	`(F[A], F[B], ...)` , `(A, B, ...) => C`	`F[C]`	Applicative
(fa, fb, ...).tupled	`(F[A], F[B], ...)`	`F[(A, B, ...)]`	Applicative
flatMap	`F[A]` , `A => F[B]`	`F[B]`	Monad
traverse	`F[A]` , `A => G[B]`	`G[F[A]]`	Traversable; `fa.traverse(f)` == `fa.map(f).sequence`; "foreach with effects"
sequence	`F[G[A]]`	`G[F[A]]`	Same as `fga.traverse(identity)`
attempt	`F[A]`	`F[Either[E, A]]`	Given `ApplicativeError[F, E]`

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

AngularJS Directive Attribute Binding Explanation

When using directives, you often need to pass parameters to the directive. This can be done in several ways. The first 3 can be used whether scope is true or false. This is still a WIP, so validate for yourself.

Raw Attribute Strings

<div my-directive="some string" another-param="another string"></div>

	#!/usr/bin/python

	from azure.storage import BlobService
	import argparse

	parser = argparse.ArgumentParser()
	parser.add_argument("container", help="the blob container")
	parser.add_argument("blob", help="the blob name")
	parser.add_argument("-s", "--snapshot", help="take a new snapshot", action="store_true")
	parser.add_argument("-d", "--delete", help="delete a snapshot")

	/**
	* Test
	*/
	// from http://plnkr.co/edit/WAvvu99uLhVRmdlwRWDv
	describe("Promise", function() {

	var $q,
	intervalRef;

	beforeEach(module(function(_$exceptionHandlerProvider_) {

	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
	<html>
	<head>
	<link rel="stylesheet" href="http://code.jquery.com/qunit/git/qunit.css" type="text/css" media="screen" />

	<!-- when.js Promises implementation -->
	<script src="https://raw.github.com/cujojs/when/master/when.js"></script>

	<!-- Unit testing and mocking framework -->
	<script type="text/javascript" src="http://code.jquery.com/qunit/git/qunit.js"></script>

	// NOTE: I added the .js extension to this gist so it would have syntax highlighting. This file should have NO file extension

	{
	// Settings
	"passfail" : false, // Stop on first error.
	"maxerr" : 100, // Maximum error before stopping.


	// Predefined globals whom JSHint will ignore.
	"browser" : true, // Standard browser globals e.g. `window`, `document`.