raggi

require 'eventmachine'
EM.run do
  SEKRET_SAUCE = EM.attach(
    open(RUBY_PLATFORM =~ /mswin|mingw/ ? 'NUL:' : '/dev/null', 'w')
  )
  EM.start_server('0.0.0.0', 80, Module.new do
    def post_init; proxy_incoming_to(SEKRET_SAUCE); end
  end)
end

raggi

08:58 Defi_: can anyone tell me if there are any obvious disadvantages to patching a blocking library to use fibers at the socket level?
08:58 Defi_: its far too much effort to have to rewrite large chunks of every library just to make it async and fiber-aware
08:59 raggi: if it uses non-stack stored state you could end up with concurrency issues (read: race conditions)
08:59 raggi: fibers as implemented in MRI have limited size stacks (4kb)
09:00 Defi_: hmm alright :/
09:01 raggi: if the library is trying to be thread safe, it can make a real mess too
09:01 raggi: Defi_: just use threads.
09:02 Defi_: raggi: not gonna happen...
09:02 Defi_: even if this was a personal project, i wouldnt use threads
09:03 Defi_: guess ill just have to continue rewriting parts of a bunch of libs as i go

schacon

$ git branch -r --merged | 
  grep origin | 
  grep -v '>' | 
  grep -v master | 
  xargs -L1 | 
  awk '{split($0,a,"/"); print a[2]}' | 
  xargs git push origin --delete

esperlu

#!/bin/sh

# Converts a mysqldump file into a Sqlite 3 compatible file. It also extracts the MySQL `KEY xxxxx` from the
# CREATE block and create them in separate commands _after_ all the INSERTs.

# Awk is choosen because it's fast and portable. You can use gawk, original awk or even the lightning fast mawk.
# The mysqldump file is traversed only once.

# Usage: $ ./mysql2sqlite mysqldump-opts db-name | sqlite3 database.sqlite
# Example: $ ./mysql2sqlite --no-data -u root -pMySecretPassWord myDbase | sqlite3 database.sqlite

jcf

require 'mail'

class EmailValidator < ActiveModel::EachValidator
  attr_reader :record, :attribute, :value, :email, :tree

  def validate_each(record, attribute, value)
    @record, @attribute, @value = record, attribute, value

    @email = Mail::Address.new(value)
    @tree  = email.__send__(:tree)

kagemusha

Tested on: Rails 3.1

If have error:

ActionDispatch::Session::SessionRestoreError (Session contains objects whose class definition isn't available.
Remember to require the classes for all objects kept in the session.

can fix by changing a char in secret token in initializers/secret_token.rb

    MyApp::Application.config.secret_token

jbarnette

# The worst possible way to memoize something.

class X
  def value
    @value = really_expensive_operation
    def value; @value end
    @value
  end
end

erikh

#!/usr/bin/env sh

##
# This is script with usefull tips taken from:
#   https://github.com/mathiasbynens/dotfiles/blob/master/.osx
#
# install it:
#   curl -sL https://raw.github.com/gist/2108403/hack.sh | sh
#

hellerbarde

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

austinhappel

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>name</key>
	<string>Monokai</string>
	<key>settings</key>
	<array>
		<dict>
			<key>settings</key>