ian iannono

How to install PhantomJS on Ubuntu

Version: 1.9.7

Platform: x86_64

First, install or update to the latest system software.

sudo apt-get update

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

Capybara

save_and_open_page

Matchers

have_button(locator)

My issues with Modules

In researching topics for RailsCasts I often read code in Rails and other gems. This is a great exercise to do. Not only will you pick up some coding tips, but it can help you better understand what makes code readable.

A common practice to organize code in gems is to divide it into modules. When this is done extensively I find it becomes very difficult to read. Before I explain further, a quick detour on instance_eval.

You can find instance_eval used in many DSLs: from routes to state machines. Here's an example from Thinking Sphinx.

class Article &lt; ActiveRecord::Base

	名称 : crontab
	使用权限 : 所有使用者
	使用方式 :
	crontab file [-u user]-用指定的文件替代目前的crontab。
	crontab-[-u user]-用标准输入替代目前的crontab.
	crontab-1[user]-列出用户目前的crontab.
	crontab-e[user]-编辑用户目前的crontab.
	crontab-d[user]-删除用户目前的crontab.
	crontab-c dir- 指定crontab的目录。
	crontab文件的格式：M H D m d cmd.

	# Chinese (China) translations for Devise(3.2.2)
	# by Kenrick-Zhou (https://github.com/Kenrick-Zhou)
	# https://gist.github.com/Kenrick-Zhou/7909822

	zh-CN:
	devise:
	confirmations:
	confirmed: "您的帐号已经确认，您现在已登录。"
	send_instructions: "几分钟后，您将收到确认帐号的电子邮件。"
	send_paranoid_instructions: "如果您的邮箱存在于我们的数据库中，您将收到一封确认账号的邮件。"

	# username = "my_username"
	# pwd = "my_password"
	# target_path = "my_target_path"

	# saving auth cookie
	system %Q{wget --save-cookies /tmp/cookie.txt --keep-session-cookies --post-data "username=#{username}&password=#{pwd}" -O - \
	https://rubytapas.dpdcart.com/subscriber/login?__dpd_cart=d08391e6-5fe2-4400-8b27-2dc17b413027}


	(25..600).each do \|i\|

	#Model
	@user.should have(2).children # check assosiation
	@user.should have(1).error_on(:username) # Checks whether there is an error in username
	@user.errors[:username].should include("can't be blank") # check for the error message

	expect { @user.save }.to change { User.count }.by(1) # or from(1).to(2)
	expect { @user.save! }.to raise_error(ActivieRecord::RecordInvalid)

	#More matchers
	@person.should respond_to(:child?)

	require 'feedzirra'

	# fetching a single feed
	feed = Feedzirra::Feed.fetch_and_parse("http://feeds.feedburner.com/PaulDixExplainsNothing")

	# feed and entries accessors
	feed.title # => "Paul Dix Explains Nothing"
	feed.url # => "http://www.pauldix.net"
	feed.feed_url # => "http://feeds.feedburner.com/PaulDixExplainsNothing"
	feed.etag # => "GunxqnEP4NeYhrqq9TyVKTuDnh0"