chrismccord

Phoenix 1.4 ships with exciting new features, most notably with HTTP2 support, improved development experience with faster compile times, new error pages, and local SSL certificate generation. Additionally, our channel layer internals receiveced an overhaul, provided better structure and extensibility. We also shipped a new and improved Presence javascript API, as well as Elixir formatter integration for our routing and test DSLs.

This release requires few user-facing changes and should be a fast upgrade for those on Phoenix 1.3.x.

Install the new phx.new project generator

The mix phx.new archive can now be installed via hex, for a simpler, versioned installation experience.

To grab the new archive, simply run:

fernandoaleman

brew tap homebrew/versions
brew install v8-315

gem install libv8 -v '3.16.14.13' -- --with-system-v8
gem install therubyracer -- --with-v8-dir=/usr/local/opt/v8-315

bundle install

jeremywrowe

Ember Data v1.13.x Cheatsheet

Things to remember

• If you return a promise beforeModel, model, and afterModel in a route, it will wait to resolve the promise before transitioning into the route. This is helpful when using loading and error substate templates.

• All ember data records go into a global cache. There is not a cache per query,

samselikoff

This post is also on my blog, since Gist doesn't support @ notifications.

---

Components are taking center stage in Ember 2.0. Here are some things you can do today to make the transition as smooth as possible:

• Use Ember CLI
• In general, replace views + controllers with components
• Only use controllers at the top-level for receiving data from the route, and use Ember.Controller instead of Ember.ArrayController or Ember.ObjectController
• Fetch data in your route, and set it as normal properties on your top-level controller. Export an Ember.Controller, otherwise a proxy will be generated. You can use Ember.RSVP.hash to simulate setting normal props on your controller.

willurd

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

bensheldon

class MyController < UIViewController

  def viewDidLoad
    @button = UIButton.alloc.init
    @button.when_tapped do
      weak_self = WeakRef.new(self) # <--- create a weak reference to self

      @alert = UIAlertView.alertViewWithTitle "Alert",
        message: "Message",
        cancelButtonTitle: "Dismiss",

mattetti

class Foo
  def self.bar(&block)
    block.call(42)
  end
end

class AppDelegate
  def application(application, didFinishLaunchingWithOptions:launchOptions)
    Dispatch::Queue.concurrent(:low).async do
      Foo.bar{|res| p "the answer is #{res}"}

tpope

Sprockets::Helpers::RailsHelper::AssetPaths.class_eval do
  class MissingAssetError < StandardError; end
  def digest_for_with_presence_check(logical_path)
    unless asset_environment[logical_path]
      raise MissingAssetError.new("#{logical_path} doesn't exist")
    end
    digest_for_without_presence_check(logical_path)
  end

  alias_method_chain :digest_for, :presence_check

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

iwarshak

#!/bin/bash

case "${1:-''}" in
  'start')
           # start commands here
           /opt/nginx/sbin/nginx
        ;;
  'stop')
           # stop commands here
           kill `cat /opt/nginx/logs/nginx.pid`