pithyless

class Integer
  N_BYTES = [42].pack('i').size
  N_BITS = N_BYTES * 16
  MAX = 2 ** (N_BITS - 2) - 1
  MIN = -MAX - 1
end

p Integer::MAX              #=> 4611686018427387903
p Integer::MAX.class        #=> Fixnum
p (Integer::MAX + 1).class  #=> Bignum

szabcsee

require 'sinatra'
require 'json'
require 'csv'

# Serve data as JSON
get '/hi/:name' do 
    name = params[:name]
    content_type :json
  { :message => name }.to_json
end

colinsurprenant

require 'benchmark'


class DSL1
  def initialize
    @i = 1
  end

  def self.register(&block)
    @block = block

quiver

Pub/Sub pattern with PostgreSQL's LISTEN/NOTIFY command

This is a simple chat-like program using pub-sub pattern, backed by PostgreSQL's LISTEN/NOTIFY command.

Publish

publish message to foo channel from user nickname.

$ python pub.py foo nickname
PUBLISH to channel #foo

emergent

require 'rubygems'
require 'mechanize'

agent = Mechanize.new
agent.set_proxy('proxy.example.com', 80, 'username', 'password')
agent.add_auth('http://hoge.com','b_username','b_password')
agent.user_agent_alias = "Windows Mozilla"

res = agent.get('http://hoge.com/some/page')
puts res.body

trcarden

# SSL self signed localhost for rails start to finish, no red warnings. 

# 1) Create your private key (any password will do, we remove it below)

$ openssl genrsa -des3 -out server.orig.key 2048


# 2) Remove the password

$ openssl rsa -in server.orig.key -out server.key

varemenos

// Given a query string "?to=email&why=because&first=John&Last=smith"
// getUrlVar("to")  will return "email"
// getUrlVar("last") will return "smith"

// Slightly more concise and improved version based on http://www.jquery4u.com/snippets/url-parameters-jquery/
function getUrlVar(key){
	var result = new RegExp(key + "=([^&]*)", "i").exec(window.location.search); 
	return result && unescape(result[1]) || ""; 
}

toretore

Facebook Canvas apps are loaded like this:

* User clicks link to app or tab ("page as tab")
* An iframe is inserted which loads content from the FB server (NOT yours, yet)
  Something along the lines of:
  <iframe src="http://facebook.com/page_proxy.php?appid=123">
* The FB server returns some HTML & JS with an automatically submitting form:

  <form id="humbaba" target="http://you.com/facebook">
    <input type="hidden" name="signed_request"/></form>