Joseworks

1) see re: increasing shmmax http://stackoverflow.com/a/10629164/1283020

2) add to postgresql.conf:
shared_preload_libraries = 'pg_stat_statements'   # (change requires restart)
136 pg_stat_statements.max = 1000
137 pg_stat_statements.track = all

3) restart postgres

4) check it out in psql

Joseworks

Render and Redirect

The normal controller/view flow is to display a view template corresponding to the current controller action, but sometimes we want to change that. We use render in a controller when we want to respond within the current request, and redirect_to when we want to spawn a new request.

Render

The render method is very overloaded in Rails. Most developers encounter it within the view template, using render :partial => 'form' or render @post.comments, but here we'll focus on usage within the controller.

:action

Joseworks

##How Homakov hacked GitHub and the line of code that could have prevented it

---

Please note: THIS ARTICLE IS NOT WRITTEN BY THE GITHUB TEAM or in any way associated with them. It's simply hosted as a Gist because the markdown formatting is excellent and far clearer than anything I could manage on my personal Tumblr at peternixey.com.

If you'd like to follow me on twitter my handle is @peternixey

---

Joseworks

module RenderingHelper
  # Override Rails' #render helper to fix an issue with it not honoring objects
  # with #to_partial_path definitions that return absolute paths, which is
  # problematic when rendering partials within a namespaced controller.
  def render(options={}, locals={}, &block)
    return super unless options.respond_to?(:to_partial_path)
  
    object = options
    path = object.to_partial_path

Joseworks

Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "your_email@youremail.com"

Joseworks

# app/models/user.rb
class User < ActiveRecord::Base
  validates :zip_code, presence: true, zip_code: true
end

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sudo ln -sf /usr/share/zoneinfo/UTC /etc/localtime

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%w(john paul ringo george).map { |p| p.capitalize }
# => ["John", "Paul", "Ringo", "George"]

Joseworks

class Child extends React.Component {
  render () {
    return (<div>I'm the child</div>);
  }
}

class ShowHide extends React.Component {
  constructor () {
    super ();
    this.state = {

Joseworks

# Ruby Array's "-" (minus) method removes elements from the receiver which exist in the parameter Array

[5, 6, 1] - [2, 3, 5]

# => [6, 1]

# this #subtract method will subtract the value of the parameter Array from the value of the receiver Array, defined by the actual index.
# type mismatch, Nil, and different Array length are not handled

class Array