jnicklas

describe "My page" do
  it "lists the item" do
    item = create_item

    within item_row(item) do
      expect(page).to mention_item(item)
    end
  end

  private

zenorocha

1. Get your IP Address

echo `ifconfig $(netstat -nr | grep -e default -e "^0\.0\.0\.0" | head -1 | awk '{print $NF}') | grep -e "inet " | sed -e 's/.*inet //' -e 's/ .*//' -e 's/.*\://'`

2. Modify your hosts file

paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

wosephjeber

Installing ngrok on OSX

For Homebrew v2.6.x and below:

brew cask install ngrok

For Homebrew v2.7.x and above:

supairish

# to generate your dhparam.pem file, run in the terminal
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048

maxivak

Integrate Gem/Engine and main Rails app

Overview

• Paths
• Routes
• Add functionality to controller
• Improving (Extending or overriding) Engine functionality
• Helpers
• Assets

jkarsrud

export default Ember.Component.extend({
  interval: 1000,
  timer: null,
  startTimer() {
    const timer = Ember.run.later(this, () => {
      this.sendAction('tick');
      this.startTimer();
    }, this.get('interval'));
    this.set('timer', timer);
  },

fxn

# Compresses all .js and .css files under the assets path.
namespace :deploy do
  # It is important that we execute this after :normalize_assets because
  # ngx_http_gzip_static_module recommends that compressed and uncompressed
  # variants have the same mtime. Note that gzip(1) sets the mtime of the
  # compressed file after the original one automatically.
  after :normalize_assets, :gzip_assets do
    on release_roles(fetch(:assets_roles)) do
      assets_path = release_path.join('public', fetch(:assets_prefix))
      within assets_path do

dtchepak

# Reference: https://www.igvita.com/2007/02/13/building-dynamic-webrick-servers-in-ruby/
require 'webrick'

class Echo < WEBrick::HTTPServlet::AbstractServlet
  def do_GET(request, response)
    puts request
    response.status = 200
  end
  def do_POST(request, response)
    puts request

jamesarosen

Recently, I upgraded from ember-qunit 0.3.1 to 0.3.2. The main reason I wanted to upgrade was to take advantage of a new way of writing component tests.

Previously, there was no way to test how the component was actually used. A component test could instantiate a component and poke at its internals, but that isn't how we use components. We use them declaratively in templates. The old style also meant it was difficult to test block templates and impossible to test block parameters.

I really wanted the new test style, but it wasn't easy to get there. The following are my upgrade notes.

Gotcha: moduleForComponent Requires Three Arguments

Many of my old component tests looked like