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

UIColor+Helper.swift

import UIKit

extension UIColor {
    convenience init(hex: String, alpha: CGFloat = 1) {
        assert(hex[hex.startIndex] == "#", "Expected hex string of format #RRGGBB")
        
        let scanner = NSScanner(string: hex)
        scanner.scanLocation = 1  // skip #
        
        var rgb: UInt32 = 0

samselikoff

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

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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.

zorab47

# RSpec CanCan matcher.
#
# When testing your user must have an id otherwise a nil foreign key will
# match on new records.
#
# Examples
#
#   describe User do
#     subject { User.create! }
#

zorab47

namespace :deploy do
  namespace :assets do
    task :precompile, :roles => :web, :except => { :no_release => true } do
      assets_path = File.join(release_path, "public/assets")
      assets_empty = capture("ls -x #{assets_path}").length == 0

      has_current_release = capture("if [ -d #{current_path} ]; then echo -n \"yes\"; fi") == "yes"

      compile_assets = false