zhuochun

Gems

gem 'debugger', group: [:development, :test]

Debugging

• Add debugger to anywhere in code that needs a breakpoint.
• Refresh the page, the rails server terminal will stop, use help.

zhuochun

.make_spans(@index, @total) when (@index < @total) {
    .span@{index} {
        height: unit((30 * @index), px);
    }

    .make_spans((@index + 1), @total);
}

.make_spans(1, 34);

zhuochun

{
    "main": "index.html",
    "name": "nw-demo",
    "description": "demo app of node-webkit",
    "version": "0.1.0",
    "keywords": [ "demo", "node-webkit" ],
    "window": {
        "title": "node-webkit demo",
        "icon": "link.png",
        "toolbar": true,

zhuochun

// Include gulp
var gulp = require('gulp');

// Include Our Plugins
var sass = require('gulp-sass');

var lr = require('tiny-lr'),
    refresh = require('gulp-livereload'),
    server = lr();

zhuochun

class User < ActiveRecord::Base
  # ... lots of persistence stuff
end

class GitHubUserProvisioner < SimpleDelegator
  def provision_with!(user_info, extra_user_hash)
    self.github_login = extra_user_hash['login']
    self.name = user_info['name']
    self.email = user_info['email']
    self.github_url = user_info['urls']['GitHub']

zhuochun

class User < ActiveRecord::Base
     #let's just make it simple and only add one column for this model called 'username'
     attr_accessible :username

     #use "follower_id" as the foreign key since by default it will use "user_id" which does 
     #not exist inside the "relationships" table
     has_many :relationships, foreign_key: :follower_id

     #find all user with the ID matching the "followed_user_ids" of the result. If I did not 
     #include "source: :followed_user", it will look for the column "following_id" which is wrong

zhuochun

// Zhuochun
// 2013-12-15

function eventFire(el, etype) {
    if (el.fireEvent) {
        (el.fireEvent('on' + etype));
    } else {
        var evObj = document.createEvent('Events');
        evObj.initEvent(etype, true, false);
        el.dispatchEvent(evObj);

zhuochun

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

zhuochun

After the latest OS X system update, Macbook Air 2013 Webcam no longer working on Chrome/Skype.

Solution

1. Download the attached file.

2. Go to Finder>Go>Go to Folder

3. Copy and paste this into the search bar: /Library/CoreMediaIO/Plug-Ins/DAL/

zhuochun

class DeviseCreateUsers < ActiveRecord::Migration
  def change
    create_table :users do |t|
      t.timestamps
      ## Database authenticatable
      t.string :email,              :null => false, :default => ""
      t.string :encrypted_password, :null => false, :default => ""

      ## Recoverable
      t.string   :reset_password_token