Upgrade to Pro — share decks privately, control downloads, hide ads and more …
Sign up for free

State Pattern From GoF

Sponsored · Your Podcast. Everywhere. Effortlessly. Share. Educate. Inspire. Entertain. You do you. We'll handle the rest. →
Avatar for Chris Bushell Chris Bushell
July 07, 2010
Programming
86
1

State Pattern From GoF

Prepared for the Melbourne Patterns Group

Avatar for Chris Bushell

Chris Bushell

July 07, 2010

More Decks by Chris Bushell

See All by Chris Bushell
Test Automation for Packaged Systems: Yes You Can!
Avatar for Chris Bushell cbushell
0
97
Introduction to Pair Programming
Avatar for Chris Bushell cbushell
1
150
An Introduction to BDD
Avatar for Chris Bushell cbushell
5
200
An Introduction to HTTP
Avatar for Chris Bushell cbushell
2
170
Agile Test Automation
Avatar for Chris Bushell cbushell
2
210
Working Effectively With Legacy Code
Avatar for Chris Bushell cbushell
4
270
Jasmine, BDD for JavaScript
Avatar for Chris Bushell cbushell
1
140
Branches Are For Trees. How to Develop Software Without Them
Avatar for Chris Bushell cbushell
1
130
Continuous Integration, fast builds and Flot
Avatar for Chris Bushell cbushell
2
92

Other Decks in Programming

See All in Programming
Augmenting AI with the Power of Jakarta EE
Avatar for ivargrimstad ivargrimstad
0
510
golang-bob.pdf
Avatar for Yura Iwatsuka iwatsukayura
0
150
プロジェクトコードをキレイキレイしよう！暗黙的な参照を読み解く静的解析
Avatar for Takuma Osada ostk0069
0
190
社内AIエージェント「Askワンバン」における コストチューニングの取り組み
Avatar for t0yohei t0yohei
0
120
LLM 101
Avatar for Leonardo YongUk Kim dalinaum
0
380
AIが生成したコードは読むべきか？抽象化設計とコードの品質保証 / abstraction-design-and-quality
Avatar for MinoDriven minodriven
12
7.8k
Long Living Tokens, Die, Die, Die! (or: The One Ring is Banned in Modern)
Avatar for sylph01 sylph01
0
390
AIがコードを書いてくれる時代、我々は何を確かめるのか
Avatar for Yosuke Furukawa yosuke_furukawa
PRO
13
5.3k
SODA - FACT BOOK（EN）
Avatar for SODA inc. sodainc
1
190
ActionController meets Protocol Buffers
Avatar for Sorah Fukumori sorah
1
750
Spec-Driven Development - Why Vaadin Is the Perfect Fit
Avatar for Simon Martinelli simas
PRO
0
190
[2026-10-09]一枚の布で作らなくてもいい。 信頼性は「パッチワーク」で紡がれる～既存の運用と新しい可能性をつなぎ合わせてきたCREの話～
Avatar for tosite tosite
0
120

Featured

See All Featured
Site-Speed That Sticks
Avatar for Harry Roberts csswizardry
13
1.6k
Leading Effective Engineering Teams in the AI Era
Avatar for Addy Osmani addyosmani
9
2.8k
Being A Developer After 40
Avatar for Adrian Kosmaczewski akosma
PRO
92
590k
The B2B funnel & how to create a winning content strategy
Avatar for Katarina Dahlin katarinadahlin
PRO
1
590
Between Models and Reality
Avatar for mayunak mayunak
4
530
Chasing Engaging Ingredients in Design
Avatar for Sebastian Deterding codingconduct
0
380
Data-driven link building: lessons from a $708K investment (BrightonSEO talk)
Avatar for Szymon Słowik szymonslowik
1
1.4k
Mind Mapping
Avatar for Hélio Medeiros helmedeiros
1
420
Fireside Chat
Avatar for paigeccino paigeccino
43
4.1k
Thoughts on Productivity
Avatar for Jon Yablonski jonyablonski
76
5.4k
Joys of Absence: A Defence of Solitary Play
Avatar for Sebastian Deterding codingconduct
1
560
The Mindset for Success: Future Career Progression
Avatar for Greg Gifford greggifford
PRO
0
550

Transcript

  1. State  Pa'ern  From  GoF   Chris  Bushell  7th  July  2010

       

  2. Mo<va<on   “Allow  an  object  to  alter  its  behavior  when

     its   internal  state  changes”  

  3. Code  

  4. Applicability   •  Behavior  depends  on  state   •  Opera<ons

     have  large  condi<onal  statements   which  depend  on  state  

  5. Par<cipants  

  6. Collabora<ons   •  Context  and  Concrete  State   •  Context

     is  primary  interface  for  clients  

  7. Consequences   •  Localizes  state  specific  behavior.  Avoids  code  

    duplica<on   •  State  changes  are  well  defined,  atomic   opera<ons   •  State  objects  can  be  shared  

  8. Implementa<on   •  Context  or  Concrete  State  defines  transi<ons?  

    •  Table  based  approach  to  defining  transi<ons   •  Singleton,  Flyweight