Juntao Qiu abruzzi

Getting Started with NPM (as a developer)

If you haven't already set your NPM author info, now you should:

npm set init.author.name "Your Name"
npm set init.author.email "[email protected]"
npm set init.author.url "http://yourblog.com"

npm adduser

Getting Started with NPM (as a developer)

If you haven't already set your NPM author info, now you should:

npm set init.author.name "Your Name"
npm set init.author.email "[email protected]"
npm set init.author.url "http://yourblog.com"

npm adduser

Reader Macros in Common Lisp

This post also appears on lisper.in.

Reader macros are perhaps not as famous as ordinary macros. While macros are a great way to create your own DSL, reader macros provide even greater flexibility by allowing you to create entirely new syntax on top of Lisp.

Paul Graham explains them very well in [On Lisp][] (Chapter 17, Read-Macros):

The three big moments in a Lisp expression's life are read-time, compile-time, and runtime. Functions are in control at runtime. Macros give us a chance to perform transformations on programs at compile-time. ...read-macros... do their work at read-time.

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

So you're curious in learning this new thing called Reactive Programming, particularly its variant comprising of Rx, Bacon.js, RAC, and others.

Learning it is hard, even harder by the lack of good material. When I started, I tried looking for tutorials. I found only a handful of practical guides, but they just scratched the surface and never tackled the challenge of building the whole architecture around it. Library documentations often don't help when you're trying to understand some function. I mean, honestly, look at this:

Rx.Observable.prototype.flatMapLatest(selector, [thisArg])

Projects each element of an observable sequence into a new sequence of observable sequences by incorporating the element's index and then transforms an observable sequence of observable sequences into an observable sequence producing values only from the most recent observable sequence.

	describe('e2e: main', function() {

	var ptor;

	beforeEach(function() {
	browser.get('/');
	ptor = protractor.getInstance();
	});

	it('should load the home page', function() {

	# MySQL. Versions 4.1 and 5.0 are recommended.
	#
	# Install the MySQL driver:
	# gem install mysql2
	#
	# And be sure to use new-style password hashing:
	# http://dev.mysql.com/doc/refman/5.0/en/old-client.html
	development:
	adapter: mysql2
	encoding: utf8

	package jmeter

	import com.excilys.ebi.gatling.core.Predef._
	import com.excilys.ebi.gatling.http.Predef._
	import com.excilys.ebi.gatling.http.Headers.Names._
	import bootstrap._

	class JMeterBenchmark extends Simulation {

	val httpConf = httpConfig

	=Navigating=
	visit('/projects')
	visit(post_comments_path(post))

	=Clicking links and buttons=
	click_link('id-of-link')
	click_link('Link Text')
	click_button('Save')
	click('Link Text') # Click either a link or a button
	click('Button Value')

	require 'active_record'
	require 'yaml'
	require 'mysql'
	require 'logger'

	task :default => :migrate

	desc "Migrate the database through scripts in db/migrate. Target specific version with VERSION=x"
	task :migrate => :environment do
	ActiveRecord::Migrator.migrate('db/migrate', ENV["VERSION"] ? ENV["VERSION"].to_i : nil )

	@mixin ie6 { * html & { @content } }

	#logo {
	background-image: url("/images/logo.png");
	@include ie6 { background-image: url("/images/logo.gif"); }
	}