RubyConf China 17/11/2012 - [UNCUT] Become a Better Developer You Can

2735068c913a072744a799e3c0833b7b?s=47 Fred Wu
November 17, 2012

RubyConf China 17/11/2012 - [UNCUT] Become a Better Developer You Can

2735068c913a072744a799e3c0833b7b?s=128

Fred Wu

November 17, 2012
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Transcript

  1. 7.

    • 1997 Got my first computer (Intel Pentium MMX 166Mhz)

    • 1997 Started using BBS (上海热线) and the Internet via 33.6Kbps modem 4 Saturday, 17 November 12
  2. 8.

    • 1997 Got my first computer (Intel Pentium MMX 166Mhz)

    • 1997 Started using BBS (上海热线) and the Internet via 33.6Kbps modem • 1997 Made my first ever HTML web page in Microsoft Frontpage Express 4 Saturday, 17 November 12
  3. 9.

    • 1997 Got my first computer (Intel Pentium MMX 166Mhz)

    • 1997 Started using BBS (上海热线) and the Internet via 33.6Kbps modem • 1997 Made my first ever HTML web page in Microsoft Frontpage Express • 1998 Moved to Australia 4 Saturday, 17 November 12
  4. 10.

    • 1997 Got my first computer (Intel Pentium MMX 166Mhz)

    • 1997 Started using BBS (上海热线) and the Internet via 33.6Kbps modem • 1997 Made my first ever HTML web page in Microsoft Frontpage Express • 1998 Moved to Australia • 2001 Started playing with Perl (雷傲), ASP (动⺴⽹网) and PHP (Discuz!) forum software 4 Saturday, 17 November 12
  5. 11.

    • 1997 Got my first computer (Intel Pentium MMX 166Mhz)

    • 1997 Started using BBS (上海热线) and the Internet via 33.6Kbps modem • 1997 Made my first ever HTML web page in Microsoft Frontpage Express • 1998 Moved to Australia • 2001 Started playing with Perl (雷傲), ASP (动⺴⽹网) and PHP (Discuz!) forum software • 2004 Started learning PHP and JavaScript in TAFE (pre-university bridge) 4 Saturday, 17 November 12
  6. 12.

    • 1997 Got my first computer (Intel Pentium MMX 166Mhz)

    • 1997 Started using BBS (上海热线) and the Internet via 33.6Kbps modem • 1997 Made my first ever HTML web page in Microsoft Frontpage Express • 1998 Moved to Australia • 2001 Started playing with Perl (雷傲), ASP (动⺴⽹网) and PHP (Discuz!) forum software • 2004 Started learning PHP and JavaScript in TAFE (pre-university bridge) • 2006 Started working part-time as a junior developer whilst studying in university 4 Saturday, 17 November 12
  7. 13.

    • 1997 Got my first computer (Intel Pentium MMX 166Mhz)

    • 1997 Started using BBS (上海热线) and the Internet via 33.6Kbps modem • 1997 Made my first ever HTML web page in Microsoft Frontpage Express • 1998 Moved to Australia • 2001 Started playing with Perl (雷傲), ASP (动⺴⽹网) and PHP (Discuz!) forum software • 2004 Started learning PHP and JavaScript in TAFE (pre-university bridge) • 2006 Started working part-time as a junior developer whilst studying in university • 2006 Discovered Ruby and Ruby on Rails, and switched to OS X because of Textmate 4 Saturday, 17 November 12
  8. 14.

    • 1997 Got my first computer (Intel Pentium MMX 166Mhz)

    • 1997 Started using BBS (上海热线) and the Internet via 33.6Kbps modem • 1997 Made my first ever HTML web page in Microsoft Frontpage Express • 1998 Moved to Australia • 2001 Started playing with Perl (雷傲), ASP (动⺴⽹网) and PHP (Discuz!) forum software • 2004 Started learning PHP and JavaScript in TAFE (pre-university bridge) • 2006 Started working part-time as a junior developer whilst studying in university • 2006 Discovered Ruby and Ruby on Rails, and switched to OS X because of Textmate • 2008 Started professionally as a web developer (HTML, CSS, PHP and JavaScript) 4 Saturday, 17 November 12
  9. 15.

    • 1997 Got my first computer (Intel Pentium MMX 166Mhz)

    • 1997 Started using BBS (上海热线) and the Internet via 33.6Kbps modem • 1997 Made my first ever HTML web page in Microsoft Frontpage Express • 1998 Moved to Australia • 2001 Started playing with Perl (雷傲), ASP (动⺴⽹网) and PHP (Discuz!) forum software • 2004 Started learning PHP and JavaScript in TAFE (pre-university bridge) • 2006 Started working part-time as a junior developer whilst studying in university • 2006 Discovered Ruby and Ruby on Rails, and switched to OS X because of Textmate • 2008 Started professionally as a web developer (HTML, CSS, PHP and JavaScript) • 2010 Started programming in Ruby full time (mostly) 4 Saturday, 17 November 12
  10. 16.

    • 1997 Got my first computer (Intel Pentium MMX 166Mhz)

    • 1997 Started using BBS (上海热线) and the Internet via 33.6Kbps modem • 1997 Made my first ever HTML web page in Microsoft Frontpage Express • 1998 Moved to Australia • 2001 Started playing with Perl (雷傲), ASP (动⺴⽹网) and PHP (Discuz!) forum software • 2004 Started learning PHP and JavaScript in TAFE (pre-university bridge) • 2006 Started working part-time as a junior developer whilst studying in university • 2006 Discovered Ruby and Ruby on Rails, and switched to OS X because of Textmate • 2008 Started professionally as a web developer (HTML, CSS, PHP and JavaScript) • 2010 Started programming in Ruby full time (mostly) • 2010 Started contributing to many open source ruby projects, including Ruby on Rails 4 Saturday, 17 November 12
  11. 17.

    2004 2005 2006 2007 2008 2009 2010 2011 2012 JavaScript

    PHP Ruby AREAS OF FOCUS 5 Saturday, 17 November 12
  12. 20.

    Dr Nic Williams Author of Rails Textmate bundle, works at

    Engine Yard Ryan Bigg Author of Rails 3 in Action, 2011 Ruby Hero Pat Allan Author of Thinking Sphinx, 2009 Ruby Hero Xavier Shay Author of Cane and Enki, works at Square Ben Schwarz Member of W3C’s CSS Working Group Darcy Laycock Author of API Smith, 2011 Ruby Hero Justin French Author of Formtastic Daniel Neighman Author of Warden, works at Square Ben Hoskings Author of Babushka Marcus Crafter Author of Sprinkle Charlie Somerville Author of Slash language, a talented 18 year old! Jack Chen (Chendo) Contributor to iTerm2 Mikel Lindsaar Author of Mail, rails core committer John Barton Cofounder of Goodfil.ms, dev manager of Envato for 3+ years Paul Annesley Built 99designs, works at SitePoint Gareth Townsend Founder of Melbourne Cocoaheads Ivan Vanderbyl Founder of Crashlog Glen Maddern Cofounder of Goodfil.ms Alan Harper Author of Rubyzip James Healy Author of PDF::Reader, maintainer of Prawn Florian Hanke Author of Picky 7 Saturday, 17 November 12
  13. 21.

    • General Tips and Thoughts • Code Tips and Examples

    • Q & A (提问时间,中⽂文) ABOUT THIS TALK 8 Saturday, 17 November 12
  14. 25.

    THREE STAGES OF PHOTOGRAPHY 1. You discuss camera equipment. 三流摄影师谈器材。

    2. You discuss shooting techniques. ⼆二流摄影师谈技术。 10 Saturday, 17 November 12
  15. 26.

    THREE STAGES OF PHOTOGRAPHY 1. You discuss camera equipment. 三流摄影师谈器材。

    2. You discuss shooting techniques. ⼆二流摄影师谈技术。 3. You discuss creative and thought processes. ⼀一流摄影师谈思想。 10 Saturday, 17 November 12
  16. 28.

    THREE STAGES OF PROGRAMMERS 1. You discuss tools and editors.

    三流程序员谈⼯工具。 11 Saturday, 17 November 12
  17. 29.

    THREE STAGES OF PROGRAMMERS 1. You discuss tools and editors.

    三流程序员谈⼯工具。 2. You discuss programming techniques. ⼆二流程序员谈技术。 11 Saturday, 17 November 12
  18. 30.

    THREE STAGES OF PROGRAMMERS 1. You discuss tools and editors.

    三流程序员谈⼯工具。 2. You discuss programming techniques. ⼆二流程序员谈技术。 3. You discuss creative and thought processes. ⼀一流程序员谈思想。 11 Saturday, 17 November 12
  19. 32.

    THREE STAGES OF SOFTWARE DEVELOPMENT 1. You are being paid

    for what you do. 三流程序员提供汗⽔水。 12 Saturday, 17 November 12
  20. 33.

    THREE STAGES OF SOFTWARE DEVELOPMENT 1. You are being paid

    for what you do. 三流程序员提供汗⽔水。 2. You are being paid for what you know. ⼆二流程序员提供脑⼒力。 12 Saturday, 17 November 12
  21. 34.

    THREE STAGES OF SOFTWARE DEVELOPMENT 1. You are being paid

    for what you do. 三流程序员提供汗⽔水。 2. You are being paid for what you know. ⼆二流程序员提供脑⼒力。 3. You are being paid for your experience. ⼀一流程序员提供经验。 12 Saturday, 17 November 12
  22. 35.

    DISCLAIMER I am still a n00b. ⼩小⼩小菜⻦鸟。 But I care,

    so I share. 抛砖引⽟玉。 13 Saturday, 17 November 12
  23. 39.
  24. 40.

    • What interests you? • Product? 产品控 • Technology? 技术控

    • Maths and algorithm? 算法控 WHERE TO START 14 Saturday, 17 November 12
  25. 41.

    • What interests you? • Product? 产品控 • Technology? 技术控

    • Maths and algorithm? 算法控 • Money? ⾦金钱控 WHERE TO START 14 Saturday, 17 November 12
  26. 42.

    • What interests you? • Product? 产品控 • Technology? 技术控

    • Maths and algorithm? 算法控 • Money? ⾦金钱控 • Choose where to work wisely WHERE TO START 14 Saturday, 17 November 12
  27. 43.

    • What interests you? • Product? 产品控 • Technology? 技术控

    • Maths and algorithm? 算法控 • Money? ⾦金钱控 • Choose where to work wisely • But it probably doesn’t matter (as much) for the first year or two WHERE TO START 14 Saturday, 17 November 12
  28. 45.

    THE ART OF ASKING QUESTIONS • Don’t be vague (“Can

    I use Rails for XYZ?” is not a good question). 模棱两可惹⼈人厌。 15 Saturday, 17 November 12
  29. 46.

    THE ART OF ASKING QUESTIONS • Don’t be vague (“Can

    I use Rails for XYZ?” is not a good question). 模棱两可惹⼈人厌。 • Give context and details (e.g. error stack trace). 提供上下⽂文与出错报告。 15 Saturday, 17 November 12
  30. 47.

    THE ART OF ASKING QUESTIONS • Don’t be vague (“Can

    I use Rails for XYZ?” is not a good question). 模棱两可惹⼈人厌。 • Give context and details (e.g. error stack trace). 提供上下⽂文与出错报告。 • Show that you’ve done your research. 必要的功课先做好。 15 Saturday, 17 November 12
  31. 48.

    THE ART OF ASKING QUESTIONS • Don’t be vague (“Can

    I use Rails for XYZ?” is not a good question). 模棱两可惹⼈人厌。 • Give context and details (e.g. error stack trace). 提供上下⽂文与出错报告。 • Show that you’ve done your research. 必要的功课先做好。 • Respect the answers and comments offered to you. 尊重别⼈人给出的答案和意⻅见。 15 Saturday, 17 November 12
  32. 49.

    THE ART OF ASKING QUESTIONS • Don’t be vague (“Can

    I use Rails for XYZ?” is not a good question). 模棱两可惹⼈人厌。 • Give context and details (e.g. error stack trace). 提供上下⽂文与出错报告。 • Show that you’ve done your research. 必要的功课先做好。 • Respect the answers and comments offered to you. 尊重别⼈人给出的答案和意⻅见。 • Be mindful of how many questions you ask. 短时间内不要提⼤大量的问题。 15 Saturday, 17 November 12
  33. 50.

    THE ART OF ASKING QUESTIONS • Don’t be vague (“Can

    I use Rails for XYZ?” is not a good question). 模棱两可惹⼈人厌。 • Give context and details (e.g. error stack trace). 提供上下⽂文与出错报告。 • Show that you’ve done your research. 必要的功课先做好。 • Respect the answers and comments offered to you. 尊重别⼈人给出的答案和意⻅见。 • Be mindful of how many questions you ask. 短时间内不要提⼤大量的问题。 • Don’t be a Help Vampire! http://slash7.com/2006/12/22/vampires/ 15 Saturday, 17 November 12
  34. 52.

    BE MINDFUL WHAT YOU SAY • Be nice! Attacking people

    on Twitter or Weibo is not cool. 基本道德:不攻击他⼈人。 16 Saturday, 17 November 12
  35. 53.

    BE MINDFUL WHAT YOU SAY • Be nice! Attacking people

    on Twitter or Weibo is not cool. 基本道德:不攻击他⼈人。 • Make sure you checked your facts. 事实胜于雄辩。 16 Saturday, 17 November 12
  36. 54.

    BE MINDFUL WHAT YOU SAY • Be nice! Attacking people

    on Twitter or Weibo is not cool. 基本道德:不攻击他⼈人。 • Make sure you checked your facts. 事实胜于雄辩。 • Deflect office politics. 规避办公室政治。 16 Saturday, 17 November 12
  37. 55.

    BE MINDFUL WHAT YOU SAY • Be nice! Attacking people

    on Twitter or Weibo is not cool. 基本道德:不攻击他⼈人。 • Make sure you checked your facts. 事实胜于雄辩。 • Deflect office politics. 规避办公室政治。 • Don’t spread pirate links! 不散播盗版链接。 16 Saturday, 17 November 12
  38. 56.

    BE MINDFUL WHAT YOU SAY • Be nice! Attacking people

    on Twitter or Weibo is not cool. 基本道德:不攻击他⼈人。 • Make sure you checked your facts. 事实胜于雄辩。 • Deflect office politics. 规避办公室政治。 • Don’t spread pirate links! 不散播盗版链接。 • Don’t waste energy in endless debates. 不参与⽆无谓的争辩。 Credit: xkcd.com 16 Saturday, 17 November 12
  39. 58.

    ADJUST CONFIDENCE LEVEL • Aim too low you’ll never improve.

    ⺫⽬目标定太低,难以进步。 17 Saturday, 17 November 12
  40. 59.

    ADJUST CONFIDENCE LEVEL • Aim too low you’ll never improve.

    ⺫⽬目标定太低,难以进步。 • Aim too high you’ll be depressed. ⺫⽬目标定太⾼高,永追不上。 17 Saturday, 17 November 12
  41. 60.

    ADJUST CONFIDENCE LEVEL • Aim too low you’ll never improve.

    ⺫⽬目标定太低,难以进步。 • Aim too high you’ll be depressed. ⺫⽬目标定太⾼高,永追不上。 • So make your goals @variables rather than CONSTANTS. 把⺫⽬目标设为变量,⽽而⾮非常量。 17 Saturday, 17 November 12
  42. 62.

    THOUGHTS ON SOFTWARE DEVELOPMENT • Second system syndrome - avoid

    total rewrites. 第⼆二系统综合症——避免重写。 18 Saturday, 17 November 12
  43. 63.

    THOUGHTS ON SOFTWARE DEVELOPMENT • Second system syndrome - avoid

    total rewrites. 第⼆二系统综合症——避免重写。 • Software engineering is like playing Starcraft - always check your mini-map. 软件⼯工程有如星际争霸——需经常关注迷你地图,以⼤大局为重。 18 Saturday, 17 November 12
  44. 64.

    THOUGHTS ON SOFTWARE DEVELOPMENT • Second system syndrome - avoid

    total rewrites. 第⼆二系统综合症——避免重写。 • Software engineering is like playing Starcraft - always check your mini-map. 软件⼯工程有如星际争霸——需经常关注迷你地图,以⼤大局为重。 • Experience is as important as talent, if not more important. 经验与天赋同重要。 18 Saturday, 17 November 12
  45. 65.

    THOUGHTS ON SOFTWARE DEVELOPMENT • Second system syndrome - avoid

    total rewrites. 第⼆二系统综合症——避免重写。 • Software engineering is like playing Starcraft - always check your mini-map. 软件⼯工程有如星际争霸——需经常关注迷你地图,以⼤大局为重。 • Experience is as important as talent, if not more important. 经验与天赋同重要。 • Technical debt is a debt, the longer you wait, the more interests you pay. 技术债务——拖⽋欠越久,偿还越多。 18 Saturday, 17 November 12
  46. 66.

    THOUGHTS ON SOFTWARE DEVELOPMENT • Second system syndrome - avoid

    total rewrites. 第⼆二系统综合症——避免重写。 • Software engineering is like playing Starcraft - always check your mini-map. 软件⼯工程有如星际争霸——需经常关注迷你地图,以⼤大局为重。 • Experience is as important as talent, if not more important. 经验与天赋同重要。 • Technical debt is a debt, the longer you wait, the more interests you pay. 技术债务——拖⽋欠越久,偿还越多。 • Choose the application architecture wisely. 谨慎选择软件架构。 18 Saturday, 17 November 12
  47. 68.

    APPLICATION ARCHITECTURE SHOWCASE • We need a profile system to

    hold user data. ⽤用户帐户系统。 19 Saturday, 17 November 12
  48. 69.

    APPLICATION ARCHITECTURE SHOWCASE • We need a profile system to

    hold user data. ⽤用户帐户系统。 • The profile system will potentially be used standalone. ⽤用户帐户系统未来可能会被独⽴立使⽤用。 19 Saturday, 17 November 12
  49. 70.

    APPLICATION ARCHITECTURE SHOWCASE • We need a profile system to

    hold user data. ⽤用户帐户系统。 • The profile system will potentially be used standalone. ⽤用户帐户系统未来可能会被独⽴立使⽤用。 • We need plugin-able “modules”. 需可插⼊入式模块系统。 19 Saturday, 17 November 12
  50. 71.

    APPLICATION ARCHITECTURE SHOWCASE • We need a profile system to

    hold user data. ⽤用户帐户系统。 • The profile system will potentially be used standalone. ⽤用户帐户系统未来可能会被独⽴立使⽤用。 • We need plugin-able “modules”. 需可插⼊入式模块系统。 • There will potentially be 3rd party modules. 未来可能会有第三⽅方开发的模块。 19 Saturday, 17 November 12
  51. 72.

    APPLICATION ARCHITECTURE SHOWCASE • We need a profile system to

    hold user data. ⽤用户帐户系统。 • The profile system will potentially be used standalone. ⽤用户帐户系统未来可能会被独⽴立使⽤用。 • We need plugin-able “modules”. 需可插⼊入式模块系统。 • There will potentially be 3rd party modules. 未来可能会有第三⽅方开发的模块。 • Of course, the development timeline is tight. 开发周期很紧凑。 19 Saturday, 17 November 12
  52. 76.

    PERFECT? NO! • Longer development time. 开发周期过⻓长。 • Can’t guarantee

    the usefulness of the API layer for 3rd party developers. 不可预知 API 层在未来是否还可有效利⽤用。 21 Saturday, 17 November 12
  53. 77.

    PERFECT? NO! • Longer development time. 开发周期过⻓长。 • Can’t guarantee

    the usefulness of the API layer for 3rd party developers. 不可预知 API 层在未来是否还可有效利⽤用。 • More complexity == more chances to screw up. 系统越复杂,越容易出错。 21 Saturday, 17 November 12
  54. 80.

    EASY, BUT FOR HOW LONG? • One app is more

    difficult to scale out. 单⼀一系统相对较难向外扩展。 23 Saturday, 17 November 12
  55. 81.

    EASY, BUT FOR HOW LONG? • One app is more

    difficult to scale out. 单⼀一系统相对较难向外扩展。 • It is also more difficult to assign tasks. 单⼀一系统相对较难安排团队成员任务。 23 Saturday, 17 November 12
  56. 82.

    EASY, BUT FOR HOW LONG? • One app is more

    difficult to scale out. 单⼀一系统相对较难向外扩展。 • It is also more difficult to assign tasks. 单⼀一系统相对较难安排团队成员任务。 • It is more likely to have leaky code. 单⼀一系统相对更难有效封装。 23 Saturday, 17 November 12
  57. 85.

    A BALANCED SOLUTION IS A GOOD SOLUTION • Don’t over-engineer.

    避免过度⼯工程。 25 Saturday, 17 November 12
  58. 86.

    A BALANCED SOLUTION IS A GOOD SOLUTION • Don’t over-engineer.

    避免过度⼯工程。 • Good degree of separation of concern. 注重关注点分离。 25 Saturday, 17 November 12
  59. 87.

    A BALANCED SOLUTION IS A GOOD SOLUTION • Don’t over-engineer.

    避免过度⼯工程。 • Good degree of separation of concern. 注重关注点分离。 • Internal interfaces are easier than external APIs: 内部接⼝口相对外部 API 更易开发: ‣ @gateway ||= PlatformModuleGateway.new(args) ‣ mod = module_controller(module_name).new(args) ‣ mod.validate_input ‣ mod.render_view 25 Saturday, 17 November 12
  60. 90.

    Rackspace Private Cloud VM External Providers NGINX Front End HTTP

    SERVER (Long-polling, Cache, SSL) UNICORN Worker 1 Worker 2 Worker 3 Worker N Request Router Auth Admin Controller Workflow Controler User Data Source (Rails engine modules) Gateway M V C M V C M V C M V C M V C Mailer MySQL Application Server Master Sendmail Active Record ORM UNICORN Worker 1 Worker 2 Worker N Application Server Master Group Manager Roles Manager User Profile Manager Authentication System Permissions Management CRON DFAT Scraper Master Worker Event Machine Country Scraper Regional Scraper Local DB Server Active Record ORM Data Mapper ORM Profile TMP Firewall Firewall UNIX Socket HTTP JSON HTTPS UNIX Socket Client HART Aviation API JSON (SSL) CDC VISA Link 28 Saturday, 17 November 12
  61. 91.

    Rackspace Private Cloud VM External Providers NGINX Front End HTTP

    SERVER (Long-polling, Cache, SSL) UNICORN Worker 1 Worker 2 Worker 3 Worker N Request Router Auth Admin Controller Workflow Controler User Data Source (Rails engine modules) Gateway M V C M V C M V C M V C M V C Mailer MySQL Application Server Master Sendmail Active Record ORM UNICORN Worker 1 Worker 2 Worker N Application Server Master Group Manager Roles Manager User Profile Manager Authentication System Permissions Management CRON DFAT Scraper Master Worker Event Machine Country Scraper Regional Scraper Local DB Server Active Record ORM Data Mapper ORM Profile TMP Firewall Firewall UNIX Socket HTTP JSON HTTPS UNIX Socket Client HART Aviation API JSON (SSL) CDC VISA Link 28 Saturday, 17 November 12
  62. 92.

    Rackspace Private Cloud VM External Providers NGINX Front End HTTP

    SERVER (Long-polling, Cache, SSL) UNICORN Worker 1 Worker 2 Worker 3 Worker N Request Router Auth Admin Controller Workflow Controler User Data Source (Rails engine modules) Gateway M V C M V C M V C M V C M V C Mailer MySQL Application Server Master Sendmail Active Record ORM UNICORN Worker 1 Worker 2 Worker N Application Server Master Group Manager Roles Manager User Profile Manager Authentication System Permissions Management CRON DFAT Scraper Master Worker Event Machine Country Scraper Regional Scraper Local DB Server Active Record ORM Data Mapper ORM Profile TMP Firewall Firewall UNIX Socket HTTP JSON HTTPS UNIX Socket Client HART Aviation API JSON (SSL) CDC VISA Link 28 Saturday, 17 November 12
  63. 93.

    Rackspace Private Cloud VM External Providers NGINX Front End HTTP

    SERVER (Long-polling, Cache, SSL) UNICORN Worker 1 Worker 2 Worker 3 Worker N Request Router Auth Admin Controller Workflow Controler User Data Source (Rails engine modules) Gateway M V C M V C M V C M V C M V C Mailer MySQL Application Server Master Sendmail Active Record ORM UNICORN Worker 1 Worker 2 Worker N Application Server Master Group Manager Roles Manager User Profile Manager Authentication System Permissions Management CRON DFAT Scraper Master Worker Event Machine Country Scraper Regional Scraper Local DB Server Active Record ORM Data Mapper ORM Profile TMP Firewall Firewall UNIX Socket HTTP JSON HTTPS UNIX Socket Client HART Aviation API JSON (SSL) CDC VISA Link 28 Saturday, 17 November 12
  64. 94.

    Rackspace Private Cloud VM External Providers NGINX Front End HTTP

    SERVER (Long-polling, Cache, SSL) UNICORN Worker 1 Worker 2 Worker 3 Worker N Request Router Auth Admin Controller Workflow Controler User Data Source (Rails engine modules) Gateway M V C M V C M V C M V C M V C Mailer MySQL Application Server Master Sendmail Active Record ORM UNICORN Worker 1 Worker 2 Worker N Application Server Master Group Manager Roles Manager User Profile Manager Authentication System Permissions Management CRON DFAT Scraper Master Worker Event Machine Country Scraper Regional Scraper Local DB Server Active Record ORM Data Mapper ORM Profile TMP Firewall Firewall UNIX Socket HTTP JSON HTTPS UNIX Socket Client HART Aviation API JSON (SSL) CDC VISA Link 28 Saturday, 17 November 12
  65. 95.

    Rackspace Private Cloud VM External Providers NGINX Front End HTTP

    SERVER (Long-polling, Cache, SSL) UNICORN Worker 1 Worker 2 Worker 3 Worker N Request Router Auth Admin Controller Workflow Controler User Data Source (Rails engine modules) Gateway M V C M V C M V C M V C M V C Mailer MySQL Application Server Master Sendmail Active Record ORM UNICORN Worker 1 Worker 2 Worker N Application Server Master Group Manager Roles Manager User Profile Manager Authentication System Permissions Management CRON DFAT Scraper Master Worker Event Machine Country Scraper Regional Scraper Local DB Server Active Record ORM Data Mapper ORM Profile TMP Firewall Firewall UNIX Socket HTTP JSON HTTPS UNIX Socket Client HART Aviation API JSON (SSL) CDC VISA Link 28 Saturday, 17 November 12
  66. 96.

    Rackspace Private Cloud VM External Providers NGINX Front End HTTP

    SERVER (Long-polling, Cache, SSL) UNICORN Worker 1 Worker 2 Worker 3 Worker N Request Router Auth Admin Controller Workflow Controler User Data Source (Rails engine modules) Gateway M V C M V C M V C M V C M V C Mailer MySQL Application Server Master Sendmail Active Record ORM UNICORN Worker 1 Worker 2 Worker N Application Server Master Group Manager Roles Manager User Profile Manager Authentication System Permissions Management CRON DFAT Scraper Master Worker Event Machine Country Scraper Regional Scraper Local DB Server Active Record ORM Data Mapper ORM Profile TMP Firewall Firewall UNIX Socket HTTP JSON HTTPS UNIX Socket Client HART Aviation API JSON (SSL) CDC VISA Link 28 Saturday, 17 November 12
  67. 97.

    Rackspace Private Cloud VM External Providers NGINX Front End HTTP

    SERVER (Long-polling, Cache, SSL) UNICORN Worker 1 Worker 2 Worker 3 Worker N Request Router Auth Admin Controller Workflow Controler User Data Source (Rails engine modules) Gateway M V C M V C M V C M V C M V C Mailer MySQL Application Server Master Sendmail Active Record ORM UNICORN Worker 1 Worker 2 Worker N Application Server Master Group Manager Roles Manager User Profile Manager Authentication System Permissions Management CRON DFAT Scraper Master Worker Event Machine Country Scraper Regional Scraper Local DB Server Active Record ORM Data Mapper ORM Profile TMP Firewall Firewall UNIX Socket HTTP JSON HTTPS UNIX Socket Client HART Aviation API JSON (SSL) CDC VISA Link 28 Saturday, 17 November 12
  68. 110.

    Single responsibility 单⼀一责任 Open/close 开闭 Liskov substitution ⾥里⽒氏替换 Interface segregation

    接⼝口分离 Dependency inversion 依赖倒置 32 Saturday, 17 November 12
  69. 116.

    Passes all the tests. Contains no duplication. Expresses the intent.

    Minimises the number of classes and methods. 34 Saturday, 17 November 12
  70. 120.

    ONE SIZE FITS ALL? • Scrum, Kanban, XP, Lean, Crystal...

    whatever... 37 Saturday, 17 November 12
  71. 121.

    ONE SIZE FITS ALL? • Scrum, Kanban, XP, Lean, Crystal...

    whatever... • TDD? BDD? Test first, or verify later? 37 Saturday, 17 November 12
  72. 122.

    ONE SIZE FITS ALL? • Scrum, Kanban, XP, Lean, Crystal...

    whatever... • TDD? BDD? Test first, or verify later? • If no one shoe/shirt/hat size can fit all, then why should development processes be any different? 37 Saturday, 17 November 12
  73. 123.

    ONE SIZE FITS ALL? • Scrum, Kanban, XP, Lean, Crystal...

    whatever... • TDD? BDD? Test first, or verify later? • If no one shoe/shirt/hat size can fit all, then why should development processes be any different? • There will always be people trying to sell you something. 37 Saturday, 17 November 12
  74. 124.

    ONE SIZE FITS ALL? • Scrum, Kanban, XP, Lean, Crystal...

    whatever... • TDD? BDD? Test first, or verify later? • If no one shoe/shirt/hat size can fit all, then why should development processes be any different? • There will always be people trying to sell you something. • Use whatever works for your team, your project and your culture! 37 Saturday, 17 November 12
  75. 127.

    CONTRIBUTE TO OPEN SOURCE PROJECTS • Reading code is just

    as important as writing code. 阅读代码与编写代码同重要。 39 Saturday, 17 November 12
  76. 128.

    CONTRIBUTE TO OPEN SOURCE PROJECTS • Reading code is just

    as important as writing code. 阅读代码与编写代码同重要。 • Learn from the masters. 向⼤大师们学习。 39 Saturday, 17 November 12
  77. 129.

    CONTRIBUTE TO OPEN SOURCE PROJECTS • Reading code is just

    as important as writing code. 阅读代码与编写代码同重要。 • Learn from the masters. 向⼤大师们学习。 • Take some, give some - sharing is awesome. 不断收获的同时,别忘了付出。 39 Saturday, 17 November 12
  78. 130.

    CONTRIBUTE TO OPEN SOURCE PROJECTS • Reading code is just

    as important as writing code. 阅读代码与编写代码同重要。 • Learn from the masters. 向⼤大师们学习。 • Take some, give some - sharing is awesome. 不断收获的同时,别忘了付出。 • Make things more useful for yourself therefore for others too. 对⾃自⼰己有⽤用的东⻄西,也许对他⼈人也有⽤用。 39 Saturday, 17 November 12
  79. 133.

    CONTRIBUTE TO OPEN SOURCE PROJECTS PHP CodeIgniter PHP Kohana PHP

    Vanilla Forums PHP Yii Framework JAVASCRIPT AutoSuggest RUBY Ruby on Rails RUBY RailsConfig RUBY Slim RUBY ORM Adapter RUBY Delayed Job RUBY Parallel Tests 40 Saturday, 17 November 12
  80. 135.

    OPEN SOURCE YOUR OWN WORK • Made something useful? Release

    it! 写了有⽤用的好玩意⼉儿?发布吧,勇敢的少年! 41 Saturday, 17 November 12
  81. 136.

    OPEN SOURCE YOUR OWN WORK • Made something useful? Release

    it! 写了有⽤用的好玩意⼉儿?发布吧,勇敢的少年! • Be critisied of your work, and learn from mistakes. 虚⼼心接受意⻅见与批评,由错误中学习。 41 Saturday, 17 November 12
  82. 137.

    OPEN SOURCE YOUR OWN WORK • Made something useful? Release

    it! 写了有⽤用的好玩意⼉儿?发布吧,勇敢的少年! • Be critisied of your work, and learn from mistakes. 虚⼼心接受意⻅见与批评,由错误中学习。 • Be proud of your work, and be recognised. 为⾃自⼰己的⾟辛苦成果感到⾃自豪。 41 Saturday, 17 November 12
  83. 138.

    OPEN SOURCE YOUR OWN WORK • Made something useful? Release

    it! 写了有⽤用的好玩意⼉儿?发布吧,勇敢的少年! • Be critisied of your work, and learn from mistakes. 虚⼼心接受意⻅见与批评,由错误中学习。 • Be proud of your work, and be recognised. 为⾃自⼰己的⾟辛苦成果感到⾃自豪。 • Make a little dent in the universe. ⼀一点⼩小⼩小的贡献的话,可以哟〜~ 41 Saturday, 17 November 12
  84. 141.

    OPEN SOURCE YOUR OWN WORK RUBY Action Throttler Throttle actions

    based on configurable duration and limit. RUBY Angel Nest An open source 'clone' of AngelList. RUBY API Taster Visually test your Rails application's API. RUBY AppReset Resets (and if available, seeds) your databases. RUBY Bustle Activities recording and retrieving using a simple Pub/Sub-like interface. RUBY Datamappify Turn ActiveRecord into DataMapper (sort of)! RUBY Haml2Slim Convert Haml templates to Slim templates. RUBY Inherited Resources Views DRY your view files! RUBY Ruby Decorators Ruby method decorators inspired by Python. RUBY Security Guard A collection of useful tools for auditing data. RUBY Slim Bundle A Textmate / Sublime Text bundle for Slim. PHP Authlite A lightweight, flexible Auth module for Kohana. PHP KThrottler Throttle actions based on configurable duration and limit. PHP PHamlP A bridge between Kohana and PHamlP. JAVASCRIPT Endless Scroll Endless / infinite scrolling solution for jQuery. JAVASCRIPT Inline Confirmation Less obtrusive confirmation dialogues. JAVASCRIPT Skinny Coffee Machine A simple state machine with observers. JAVASCRIPT Slideshow Lite A lightweight slideshow plugin for jQuery. 42 Saturday, 17 November 12
  85. 145.
  86. 150.

    Holy shit the code is clean. Good job dude. I'm

    impressed by your SCSS too. Good quality dev right here. -- dfischer (via Hacker News) 48 Saturday, 17 November 12
  87. 155.

    ... he's turned a negative event (getting stiffed) into positive

    exposure for his work with hundreds of HN readers. At least at a glance, it seems like solid and clean Rails / Ruby code ... -- tomkarlo (via Hacker News) 52 Saturday, 17 November 12
  88. 157.

    I reviewed the angel_nest code and I must say it

    has the best implementation. Thank you very much for releasing angel_nest as open source. -- Firoz A. (via Email) 53 Saturday, 17 November 12
  89. 180.

    ... you have an impressive collection of open source contributions,

    and it would be great to keep in touch ... -- Tom Preston-Werner (CEO, GitHub) 73 Saturday, 17 November 12
  90. 182.

    DO FREELANCE WORK • Like open source work, but with

    deadlines and pressure. 截⽌止期限与压⼒力。 74 Saturday, 17 November 12
  91. 183.

    DO FREELANCE WORK • Like open source work, but with

    deadlines and pressure. 截⽌止期限与压⼒力。 • Like open source work, but with some $$$. 赚点外快。 74 Saturday, 17 November 12
  92. 184.

    DO FREELANCE WORK • Like open source work, but with

    deadlines and pressure. 截⽌止期限与压⼒力。 • Like open source work, but with some $$$. 赚点外快。 • Be involved in projects different to those at your day job. 不同的项⺫⽬目体验与经验。 74 Saturday, 17 November 12
  93. 185.

    DO FREELANCE WORK • Like open source work, but with

    deadlines and pressure. 截⽌止期限与压⼒力。 • Like open source work, but with some $$$. 赚点外快。 • Be involved in projects different to those at your day job. 不同的项⺫⽬目体验与经验。 • Communication skills with your clients. 客户沟通经验。 74 Saturday, 17 November 12
  94. 186.

    DO FREELANCE WORK • Like open source work, but with

    deadlines and pressure. 截⽌止期限与压⼒力。 • Like open source work, but with some $$$. 赚点外快。 • Be involved in projects different to those at your day job. 不同的项⺫⽬目体验与经验。 • Communication skills with your clients. 客户沟通经验。 • Communication skills with your remote team members. 远程团队沟通经验。 74 Saturday, 17 November 12
  95. 189.

    DO FREELANCE WORK PHP ESTILE (eCommerce) PHP P1.CN (social network)

    RUBY 2Threads (eCommerce) RUBY AppHelp! (web + mobile app) RUBY 500 Startups (online portal) RUBY TED City 2.0 (content platform) 75 Saturday, 17 November 12
  96. 191.

    AND LASTLY, YOUR DAY JOB • You spend most of

    your hours awake at your day job, make it count! 76 Saturday, 17 November 12
  97. 192.

    AND LASTLY, YOUR DAY JOB • You spend most of

    your hours awake at your day job, make it count! • Know what you are looking for. 知道⾃自⼰己想要什么。 76 Saturday, 17 November 12
  98. 193.

    AND LASTLY, YOUR DAY JOB • You spend most of

    your hours awake at your day job, make it count! • Know what you are looking for. 知道⾃自⼰己想要什么。 • What can you get out of working at the company? 在这家公司⼯工作,能学习到什么? 76 Saturday, 17 November 12
  99. 194.

    AND LASTLY, YOUR DAY JOB • You spend most of

    your hours awake at your day job, make it count! • Know what you are looking for. 知道⾃自⼰己想要什么。 • What can you get out of working at the company? 在这家公司⼯工作,能学习到什么? • What did you get out of working at the company? 在这家公司⼯工作,学习到了什么? 76 Saturday, 17 November 12
  100. 196.

    AND LASTLY, YOUR DAY JOB ‣ Small web agency ‣

    Mostly static websites ‣ Mostly small clients ‣ Mostly small projects 77 Saturday, 17 November 12
  101. 197.

    AND LASTLY, YOUR DAY JOB • My first real job

    (part time) ‣ Small web agency ‣ Mostly static websites ‣ Mostly small clients ‣ Mostly small projects 77 Saturday, 17 November 12
  102. 198.

    AND LASTLY, YOUR DAY JOB • My first real job

    (part time) • HTML, CSS, PHP and JavaScript! ‣ Small web agency ‣ Mostly static websites ‣ Mostly small clients ‣ Mostly small projects 77 Saturday, 17 November 12
  103. 199.

    AND LASTLY, YOUR DAY JOB • My first real job

    (part time) • HTML, CSS, PHP and JavaScript! • Mostly worked by myself ‣ Small web agency ‣ Mostly static websites ‣ Mostly small clients ‣ Mostly small projects 77 Saturday, 17 November 12
  104. 200.

    AND LASTLY, YOUR DAY JOB • My first real job

    (part time) • HTML, CSS, PHP and JavaScript! • Mostly worked by myself • Learnt a thing or two about SEO ‣ Small web agency ‣ Mostly static websites ‣ Mostly small clients ‣ Mostly small projects 77 Saturday, 17 November 12
  105. 201.

    AND LASTLY, YOUR DAY JOB • My first real job

    (part time) • HTML, CSS, PHP and JavaScript! • Mostly worked by myself • Learnt a thing or two about SEO • I’m not as good as I thought I was ‣ Small web agency ‣ Mostly static websites ‣ Mostly small clients ‣ Mostly small projects 77 Saturday, 17 November 12
  106. 202.

    AND LASTLY, YOUR DAY JOB ‣ Small agency (print +

    web) ‣ Small to mid-sized projects ‣ Household name clients ‣ Meetings with clients 78 Saturday, 17 November 12
  107. 203.

    AND LASTLY, YOUR DAY JOB • My first full time

    job ‣ Small agency (print + web) ‣ Small to mid-sized projects ‣ Household name clients ‣ Meetings with clients 78 Saturday, 17 November 12
  108. 204.

    AND LASTLY, YOUR DAY JOB • My first full time

    job • Mostly PHP and JavaScript ‣ Small agency (print + web) ‣ Small to mid-sized projects ‣ Household name clients ‣ Meetings with clients 78 Saturday, 17 November 12
  109. 205.

    AND LASTLY, YOUR DAY JOB • My first full time

    job • Mostly PHP and JavaScript • Kohana, Zend Framework and Yii ‣ Small agency (print + web) ‣ Small to mid-sized projects ‣ Household name clients ‣ Meetings with clients 78 Saturday, 17 November 12
  110. 206.

    AND LASTLY, YOUR DAY JOB • My first full time

    job • Mostly PHP and JavaScript • Kohana, Zend Framework and Yii • Team environment ‣ Small agency (print + web) ‣ Small to mid-sized projects ‣ Household name clients ‣ Meetings with clients 78 Saturday, 17 November 12
  111. 207.

    AND LASTLY, YOUR DAY JOB • My first full time

    job • Mostly PHP and JavaScript • Kohana, Zend Framework and Yii • Team environment • Learnt things I didn’t know (print) ‣ Small agency (print + web) ‣ Small to mid-sized projects ‣ Household name clients ‣ Meetings with clients 78 Saturday, 17 November 12
  112. 208.

    AND LASTLY, YOUR DAY JOB ‣ Well-known startup ‣ Great

    platforms and websites ‣ Online education! ‣ High traffic ‣ Ruby shop 79 Saturday, 17 November 12
  113. 209.

    • Hired as a PHP developer AND LASTLY, YOUR DAY

    JOB ‣ Well-known startup ‣ Great platforms and websites ‣ Online education! ‣ High traffic ‣ Ruby shop 79 Saturday, 17 November 12
  114. 210.

    • Hired as a PHP developer • Became a Ruby

    developer AND LASTLY, YOUR DAY JOB ‣ Well-known startup ‣ Great platforms and websites ‣ Online education! ‣ High traffic ‣ Ruby shop 79 Saturday, 17 November 12
  115. 211.

    • Hired as a PHP developer • Became a Ruby

    developer • Learnt heaps from senior devs AND LASTLY, YOUR DAY JOB ‣ Well-known startup ‣ Great platforms and websites ‣ Online education! ‣ High traffic ‣ Ruby shop 79 Saturday, 17 November 12
  116. 212.

    • Hired as a PHP developer • Became a Ruby

    developer • Learnt heaps from senior devs • Manage stakeholder expectations AND LASTLY, YOUR DAY JOB ‣ Well-known startup ‣ Great platforms and websites ‣ Online education! ‣ High traffic ‣ Ruby shop 79 Saturday, 17 November 12
  117. 213.

    • Hired as a PHP developer • Became a Ruby

    developer • Learnt heaps from senior devs • Manage stakeholder expectations • Online education AND LASTLY, YOUR DAY JOB ‣ Well-known startup ‣ Great platforms and websites ‣ Online education! ‣ High traffic ‣ Ruby shop 79 Saturday, 17 November 12
  118. 214.

    • Hired as a PHP developer • Became a Ruby

    developer • Learnt heaps from senior devs • Manage stakeholder expectations • Online education • Recognisable brand AND LASTLY, YOUR DAY JOB ‣ Well-known startup ‣ Great platforms and websites ‣ Online education! ‣ High traffic ‣ Ruby shop 79 Saturday, 17 November 12
  119. 215.

    AND LASTLY, YOUR DAY JOB ‣ Well funded startup ($50M+)

    ‣ Large teams ‣ Multiple projects 80 Saturday, 17 November 12
  120. 216.

    • Hired as a senior developer AND LASTLY, YOUR DAY

    JOB ‣ Well funded startup ($50M+) ‣ Large teams ‣ Multiple projects 80 Saturday, 17 November 12
  121. 217.

    • Hired as a senior developer • 40+ developers AND

    LASTLY, YOUR DAY JOB ‣ Well funded startup ($50M+) ‣ Large teams ‣ Multiple projects 80 Saturday, 17 November 12
  122. 218.

    • Hired as a senior developer • 40+ developers •

    My first agile environment! AND LASTLY, YOUR DAY JOB ‣ Well funded startup ($50M+) ‣ Large teams ‣ Multiple projects 80 Saturday, 17 November 12
  123. 219.

    • Hired as a senior developer • 40+ developers •

    My first agile environment! • Multiple teams and projects AND LASTLY, YOUR DAY JOB ‣ Well funded startup ($50M+) ‣ Large teams ‣ Multiple projects 80 Saturday, 17 November 12
  124. 220.

    • Hired as a senior developer • 40+ developers •

    My first agile environment! • Multiple teams and projects • Made lots of friends :-) AND LASTLY, YOUR DAY JOB ‣ Well funded startup ($50M+) ‣ Large teams ‣ Multiple projects 80 Saturday, 17 November 12
  125. 221.

    AND LASTLY, YOUR DAY JOB ‣ Well-known company ‣ Respected

    in the industry ‣ Online education! ‣ High traffic 81 Saturday, 17 November 12
  126. 222.

    • Hired as a development team lead AND LASTLY, YOUR

    DAY JOB ‣ Well-known company ‣ Respected in the industry ‣ Online education! ‣ High traffic 81 Saturday, 17 November 12
  127. 223.

    • Hired as a development team lead • Tech leadership

    and management AND LASTLY, YOUR DAY JOB ‣ Well-known company ‣ Respected in the industry ‣ Online education! ‣ High traffic 81 Saturday, 17 November 12
  128. 224.

    • Hired as a development team lead • Tech leadership

    and management • Great industry connections AND LASTLY, YOUR DAY JOB ‣ Well-known company ‣ Respected in the industry ‣ Online education! ‣ High traffic 81 Saturday, 17 November 12
  129. 225.

    • Hired as a development team lead • Tech leadership

    and management • Great industry connections • Online education AND LASTLY, YOUR DAY JOB ‣ Well-known company ‣ Respected in the industry ‣ Online education! ‣ High traffic 81 Saturday, 17 November 12
  130. 226.

    • Hired as a development team lead • Tech leadership

    and management • Great industry connections • Online education • Recognisable brand AND LASTLY, YOUR DAY JOB ‣ Well-known company ‣ Respected in the industry ‣ Online education! ‣ High traffic 81 Saturday, 17 November 12
  131. 227.

    AND LASTLY, YOUR DAY JOB ‣ Well-funded startup ‣ Unique

    industry connections ‣ Early stage ‣ Big opportunities 82 Saturday, 17 November 12
  132. 228.

    • Hired as a development team lead AND LASTLY, YOUR

    DAY JOB ‣ Well-funded startup ‣ Unique industry connections ‣ Early stage ‣ Big opportunities 82 Saturday, 17 November 12
  133. 229.

    • Hired as a development team lead • Design and

    architect systems AND LASTLY, YOUR DAY JOB ‣ Well-funded startup ‣ Unique industry connections ‣ Early stage ‣ Big opportunities 82 Saturday, 17 November 12
  134. 230.

    • Hired as a development team lead • Design and

    architect systems • Build champion teams AND LASTLY, YOUR DAY JOB ‣ Well-funded startup ‣ Unique industry connections ‣ Early stage ‣ Big opportunities 82 Saturday, 17 November 12
  135. 231.

    • Hired as a development team lead • Design and

    architect systems • Build champion teams • Enterprise products + startup spirits AND LASTLY, YOUR DAY JOB ‣ Well-funded startup ‣ Unique industry connections ‣ Early stage ‣ Big opportunities 82 Saturday, 17 November 12
  136. 232.

    • Hired as a development team lead • Design and

    architect systems • Build champion teams • Enterprise products + startup spirits • Be part of something big (potentially) AND LASTLY, YOUR DAY JOB ‣ Well-funded startup ‣ Unique industry connections ‣ Early stage ‣ Big opportunities 82 Saturday, 17 November 12
  137. 234.
  138. 235.

    PERSONAL BRANDING • Designers have online portfolios, what about us

    developers? • Blog - show me your thoughts! 83 Saturday, 17 November 12
  139. 236.

    PERSONAL BRANDING • Designers have online portfolios, what about us

    developers? • Blog - show me your thoughts! • Twitter/Weibo - show me your passion! 83 Saturday, 17 November 12
  140. 237.

    PERSONAL BRANDING • Designers have online portfolios, what about us

    developers? • Blog - show me your thoughts! • Twitter/Weibo - show me your passion! • GitHub - show me your code! 83 Saturday, 17 November 12
  141. 238.

    PERSONAL BRANDING • Designers have online portfolios, what about us

    developers? • Blog - show me your thoughts! • Twitter/Weibo - show me your passion! • GitHub - show me your code! • LinkedIn - show me your resume! 83 Saturday, 17 November 12
  142. 240.

    PERSONAL BRANDING • Build up your network 拓展交际圈 • Establish

    your reputation 树⽴立好名声 • People will endorse your work 让更多⼈人赞誉你的成果 84 Saturday, 17 November 12
  143. 246.
  144. 248.
  145. 260.

    OUR GIT WORKFLOW • Two deployable branches - “master” and

    “develop” 93 Saturday, 17 November 12
  146. 261.

    OUR GIT WORKFLOW • Two deployable branches - “master” and

    “develop” • Both branches connect to CI (Jenkins + Travis) 93 Saturday, 17 November 12
  147. 262.

    OUR GIT WORKFLOW • Two deployable branches - “master” and

    “develop” • Both branches connect to CI (Jenkins + Travis) • Small tweaks and hot-fixes push to deployable branches directly 93 Saturday, 17 November 12
  148. 263.

    OUR GIT WORKFLOW • Two deployable branches - “master” and

    “develop” • Both branches connect to CI (Jenkins + Travis) • Small tweaks and hot-fixes push to deployable branches directly • Disposable feature branches 93 Saturday, 17 November 12
  149. 264.

    OUR GIT WORKFLOW • Two deployable branches - “master” and

    “develop” • Both branches connect to CI (Jenkins + Travis) • Small tweaks and hot-fixes push to deployable branches directly • Disposable feature branches • Pull requests (w/ Travis) 93 Saturday, 17 November 12
  150. 265.

    OUR GIT WORKFLOW • Two deployable branches - “master” and

    “develop” • Both branches connect to CI (Jenkins + Travis) • Small tweaks and hot-fixes push to deployable branches directly • Disposable feature branches • Pull requests (w/ Travis) • Pull requests get reviewed 93 Saturday, 17 November 12
  151. 266.

    OUR GIT WORKFLOW • Two deployable branches - “master” and

    “develop” • Both branches connect to CI (Jenkins + Travis) • Small tweaks and hot-fixes push to deployable branches directly • Disposable feature branches • Pull requests (w/ Travis) • Pull requests get reviewed • Pull requests get merged 93 Saturday, 17 November 12
  152. 267.

    OUR GIT WORKFLOW • Two deployable branches - “master” and

    “develop” • Both branches connect to CI (Jenkins + Travis) • Small tweaks and hot-fixes push to deployable branches directly • Disposable feature branches • Pull requests (w/ Travis) • Pull requests get reviewed • Pull requests get merged • Release and profit! 93 Saturday, 17 November 12
  153. 270.

    CODE REVIEW • Test coverage - SimpleCov https://github.com/colszowka/simplecov • Code

    quality measurement - Cane https://github.com/square/cane 94 Saturday, 17 November 12
  154. 277.

    CONTINUOUS INTEGRATION AND DEPLOYMENT Profile Repo Git Push Platform Repo

    Git Push Profile CI 96 Saturday, 17 November 12
  155. 278.

    CONTINUOUS INTEGRATION AND DEPLOYMENT Profile Repo Git Push Platform Repo

    Git Push Profile CI Platform CI 96 Saturday, 17 November 12
  156. 279.

    CONTINUOUS INTEGRATION AND DEPLOYMENT Profile Repo Git Push Platform Repo

    Git Push Profile CI Platform CI Integration CI 96 Saturday, 17 November 12
  157. 280.

    CONTINUOUS INTEGRATION AND DEPLOYMENT Profile Repo Git Push Platform Repo

    Git Push Profile CI Platform CI Integration CI Profile Staging Platform Staging 96 Saturday, 17 November 12
  158. 281.

    CONTINUOUS INTEGRATION AND DEPLOYMENT Profile Repo Git Push Platform Repo

    Git Push Profile CI Platform CI Integration CI Scraper Repo Git Push Profile Staging Platform Staging 96 Saturday, 17 November 12
  159. 282.

    CONTINUOUS INTEGRATION AND DEPLOYMENT Profile Repo Git Push Platform Repo

    Git Push Profile CI Platform CI Integration CI Scraper Repo Git Push Scraper CI Profile Staging Platform Staging 96 Saturday, 17 November 12
  160. 283.

    CONTINUOUS INTEGRATION AND DEPLOYMENT Profile Repo Git Push Platform Repo

    Git Push Profile CI Platform CI Integration CI Scraper Repo Git Push Scraper Cron Job Scraper CI Profile Staging Platform Staging 96 Saturday, 17 November 12
  161. 284.

    CONTINUOUS INTEGRATION AND DEPLOYMENT Profile Repo Git Push Platform Repo

    Git Push Profile CI Platform CI Integration CI Scraper Repo Git Push Scraper Cron Job Scraper Staging Scraper CI Profile Staging Platform Staging 96 Saturday, 17 November 12
  162. 287.

    QUICK START • Start developing should be simple: • git

    checkout url_to_the_repo 97 Saturday, 17 November 12
  163. 288.

    QUICK START • Start developing should be simple: • git

    checkout url_to_the_repo • bundle 97 Saturday, 17 November 12
  164. 289.

    QUICK START • Start developing should be simple: • git

    checkout url_to_the_repo • bundle • rake app:reset 97 Saturday, 17 November 12
  165. 290.

    QUICK START • Start developing should be simple: • git

    checkout url_to_the_repo • bundle • rake app:reset • rails server 97 Saturday, 17 November 12
  166. 291.

    QUICK START • Start developing should be simple: • git

    checkout url_to_the_repo • bundle • rake app:reset • rails server • Use Foreman for processes https://github.com/ddollar/foreman 97 Saturday, 17 November 12
  167. 300.
  168. 326.

    CHEAT And, once in a while, someone will attempt to

    ... 117 Saturday, 17 November 12
  169. 328.

    Thank you for informed me. I am writing to apologise

    the sloppy code. There was an unexpected house selling emergency last weekend. I was unable to spent enough time on the test. Your Agency is important to me, I value each opportunity you brought and always prepare it seriously. Please accept my sincere apology for missing this valuable job opportunity. -- Candidate who cheats 118 Saturday, 17 November 12
  170. 329.

    Thank you for informed me. I am writing to apologise

    the sloppy code. There was an unexpected house selling emergency last weekend. I was unable to spent enough time on the test. Your Agency is important to me, I value each opportunity you brought and always prepare it seriously. Please accept my sincere apology for missing this valuable job opportunity. -- Candidate who cheats 118 Saturday, 17 November 12
  171. 330.

    Thank you for informed me. I am writing to apologise

    the sloppy code. There was an unexpected house selling emergency last weekend. I was unable to spent enough time on the test. Your Agency is important to me, I value each opportunity you brought and always prepare it seriously. Please accept my sincere apology for missing this valuable job opportunity. -- Candidate who cheats 118 Saturday, 17 November 12
  172. 331.

    Thank you for informed me. I am writing to apologise

    the sloppy code. There was an unexpected house selling emergency last weekend. I was unable to spent enough time on the test. Your Agency is important to me, I value each opportunity you brought and always prepare it seriously. Please accept my sincere apology for missing this valuable job opportunity. -- Candidate who cheats 118 Saturday, 17 November 12
  173. 336.

    “I get paid for code that works, not for tests,

    so my philosophy is to test as little as possible to reach a given level of confidence.” -- Kent Beck 120 Saturday, 17 November 12
  174. 341.

    EFFECTIVE TESTS • They are describing ActiveRecord behaviours. • Allow

    mass assignments on foreign keys is wrong. 122 Saturday, 17 November 12
  175. 342.

    EFFECTIVE TESTS • They are describing ActiveRecord behaviours. • Allow

    mass assignments on foreign keys is wrong. • They are testing how methods are implemented. 122 Saturday, 17 November 12
  176. 343.

    EFFECTIVE TESTS • They are describing ActiveRecord behaviours. • Allow

    mass assignments on foreign keys is wrong. • They are testing how methods are implemented. • No confidence gained. 122 Saturday, 17 November 12
  177. 353.

    FASTER TESTS • For objects that don’t matter, use mocks

    (but don’t abuse ‘em!) ⽆无关紧要的对象们使⽤用 mock 就可以了,但切勿滥⽤用! 126 Saturday, 17 November 12
  178. 354.

    FASTER TESTS • For objects that don’t matter, use mocks

    (but don’t abuse ‘em!) ⽆无关紧要的对象们使⽤用 mock 就可以了,但切勿滥⽤用! • When use factories, favour build to create 使⽤用对象⼯工⼚厂的话,尽量使⽤用 build ⽽而⾮非 create 126 Saturday, 17 November 12
  179. 355.

    FASTER TESTS • For objects that don’t matter, use mocks

    (but don’t abuse ‘em!) ⽆无关紧要的对象们使⽤用 mock 就可以了,但切勿滥⽤用! • When use factories, favour build to create 使⽤用对象⼯工⼚厂的话,尽量使⽤用 build ⽽而⾮非 create • In-memory SQLite instead of MySQL/PostgresSQL 可以的话,测试时使⽤用 SQLite 的内存储存 126 Saturday, 17 November 12
  180. 356.

    FASTER TESTS • For objects that don’t matter, use mocks

    (but don’t abuse ‘em!) ⽆无关紧要的对象们使⽤用 mock 就可以了,但切勿滥⽤用! • When use factories, favour build to create 使⽤用对象⼯工⼚厂的话,尽量使⽤用 build ⽽而⾮非 create • In-memory SQLite instead of MySQL/PostgresSQL 可以的话,测试时使⽤用 SQLite 的内存储存 • gem install slurp 126 Saturday, 17 November 12
  181. 374.

    PROBLEM • A user has many trips • Each trip

    may contain more than one stops, e.g. • Beijing -> Shanghai • Shanghai -> Hongkong 135 Saturday, 17 November 12
  182. 375.

    PROBLEM • A user has many trips • Each trip

    may contain more than one stops, e.g. • Beijing -> Shanghai • Shanghai -> Hongkong • We only want to display the first stop from each trip 135 Saturday, 17 November 12
  183. 415.

    “There are only two hard things in Computer Science: cache

    invalidation and naming things.” -- Phil Karlton 155 Saturday, 17 November 12
  184. 420.

    PROBLEM WITH “UserApproval” • What does it mean? • A

    user’s approval? Nope. 158 Saturday, 17 November 12
  185. 421.

    PROBLEM WITH “UserApproval” • What does it mean? • A

    user’s approval? Nope. • An approval’s user? Nope. 158 Saturday, 17 November 12
  186. 422.

    PROBLEM WITH “UserApproval” • What does it mean? • A

    user’s approval? Nope. • An approval’s user? Nope. • So, it’s not an approval, or a user. 158 Saturday, 17 November 12
  187. 423.

    PROBLEM WITH “UserApproval” • What does it mean? • A

    user’s approval? Nope. • An approval’s user? Nope. • So, it’s not an approval, or a user. • Where’s the indication of “role”? 158 Saturday, 17 November 12
  188. 429.

    This portion of the slide is intentionally left blank. One

    function?! 164 Saturday, 17 November 12