SlideShare a Scribd company logo
1 of 23
Download to read offline
POKA YOKE
     The Science of Mistake Proofing




Gurpreet Luthra & Dhaval Doshi
(ThoughtWorks xConf – Bangalore – July 2012)
What is POKA YOKE ?
What is POKA YOKE ?




    Poka                YOKE

Inadvertent Mistake     Prevent
What is POKA YOKE ?



The essential idea of Poke Yoke is to mistake proof the
manufacturing process --- so that mistakes cannot be
made or can be caught/fixed quickly.
Types
of Poka Yoke devices



                       Control




                       Warning
Poka yoke: The Science of Mistake Proofing in Software
Pin Index Safety System (PISS)
Poka yoke: The Science of Mistake Proofing in Software
Buckle Up!
Poka Yoke / Mistake Proofing
             In Software
UI Mistake Proofing
UI Mistake Proofing
UI Mistake Proofing
Radiators
Unit Tests




             IDEs
Compilers



            Pre-commit
                   •   Commit Message
                   •   Developer Names
                   •   New Files missed
                   •   Build is RED check
                   •   Run Unit Tests
Auto Save          •   Check-in to VCS
Architectural Controls



HttpSession



     No updates
     on GET

                    Context specific
                    injection
Architectural Controls



Run Under
Least Privilege
                              Primitives
                              Vs Types



            Circuit
            Breaker
Some more examples…


Password
Log Check          Live Data
                   Testing




               Keyboard
               Shortcuts
What do you think?
Pragmatic
Mistake Proofing




                   Feedback



                          Blast
                          Radius
Distributed “Agile” !!


Remote Teams

                   Long Running
                   Projects


Legacy & Complex
Codebase
                    Team Attrition
Qualities of a Good Poka Yoke



            Early

          Precise

          Painless

           Simple
Instead of a BOLD font email,
       Choose a POKA YOKE

                     Thank You

More Related Content

Viewers also liked

Productivity Facts Every Employee Should Know
Productivity Facts Every Employee Should KnowProductivity Facts Every Employee Should Know
Productivity Facts Every Employee Should KnowRobert Half
 
Mistake Proofing
Mistake ProofingMistake Proofing
Mistake ProofingTom Curtis
 
عنوان کتاب کلید جوشکاری و پایپینگ جلد اول
عنوان کتاب کلید جوشکاری و پایپینگ جلد اولعنوان کتاب کلید جوشکاری و پایپینگ جلد اول
عنوان کتاب کلید جوشکاری و پایپینگ جلد اولAyat ollah Daneshmand
 
Productivity, Productivity, Productivity
Productivity, Productivity, ProductivityProductivity, Productivity, Productivity
Productivity, Productivity, ProductivityFabian Alcantara
 
Productivity improvement slide share
Productivity improvement slide shareProductivity improvement slide share
Productivity improvement slide shareK. M. Hasan Ripon
 

Viewers also liked (9)

Productivity Facts Every Employee Should Know
Productivity Facts Every Employee Should KnowProductivity Facts Every Employee Should Know
Productivity Facts Every Employee Should Know
 
Mistake Proofing
Mistake ProofingMistake Proofing
Mistake Proofing
 
عنوان کتاب کلید جوشکاری و پایپینگ جلد اول
عنوان کتاب کلید جوشکاری و پایپینگ جلد اولعنوان کتاب کلید جوشکاری و پایپینگ جلد اول
عنوان کتاب کلید جوشکاری و پایپینگ جلد اول
 
Productivity Improvement R
Productivity Improvement RProductivity Improvement R
Productivity Improvement R
 
Productivity
ProductivityProductivity
Productivity
 
what is Productivity
what is  Productivitywhat is  Productivity
what is Productivity
 
Productivity, Productivity, Productivity
Productivity, Productivity, ProductivityProductivity, Productivity, Productivity
Productivity, Productivity, Productivity
 
Poka yoke
Poka yokePoka yoke
Poka yoke
 
Productivity improvement slide share
Productivity improvement slide shareProductivity improvement slide share
Productivity improvement slide share
 

Similar to Poka yoke: The Science of Mistake Proofing in Software

Testability for developers – Fighting a mess by making it testable
Testability for developers – Fighting a mess by making it testableTestability for developers – Fighting a mess by making it testable
Testability for developers – Fighting a mess by making it testableAlexander Tarlinder
 
Pangolin Datasheet
Pangolin DatasheetPangolin Datasheet
Pangolin Datasheetmattotamhe
 
How ANDROID TESTING changed how we think about Death - Second Edition
How ANDROID TESTING changed how we think about Death - Second EditionHow ANDROID TESTING changed how we think about Death - Second Edition
How ANDROID TESTING changed how we think about Death - Second Editionpenanochizzo
 
How ANDROID TESTING changed how we think about Death - Second Edition
How ANDROID TESTING changed how we think about Death - Second EditionHow ANDROID TESTING changed how we think about Death - Second Edition
How ANDROID TESTING changed how we think about Death - Second EditionFernando Cejas
 
Developer Productivity with Forge, Java EE 6 and Arquillian
Developer Productivity with Forge, Java EE 6 and ArquillianDeveloper Productivity with Forge, Java EE 6 and Arquillian
Developer Productivity with Forge, Java EE 6 and ArquillianRay Ploski
 
Webapp acceptance testing a case study
Webapp acceptance testing   a case studyWebapp acceptance testing   a case study
Webapp acceptance testing a case studyekantola
 
Agile Software Design
Agile Software DesignAgile Software Design
Agile Software Designeduardomg23
 
baidu开发者大会 - Web App开发框架介绍以及分析
baidu开发者大会 - Web App开发框架介绍以及分析baidu开发者大会 - Web App开发框架介绍以及分析
baidu开发者大会 - Web App开发框架介绍以及分析joylite
 
Class 6: Introduction to web technology entrepreneurship
Class 6: Introduction to web technology entrepreneurshipClass 6: Introduction to web technology entrepreneurship
Class 6: Introduction to web technology entrepreneurshipallanchao
 
Continuous Delivery Overview
Continuous Delivery OverviewContinuous Delivery Overview
Continuous Delivery OverviewWill Iverson
 
Automating good coding practices
Automating good coding practicesAutomating good coding practices
Automating good coding practicesKevin Peterson
 
Designing for Testability - Rohit Nayak
Designing for Testability - Rohit NayakDesigning for Testability - Rohit Nayak
Designing for Testability - Rohit NayakIndicThreads
 
LocWorld: Building an Internationalization Plan; October 2011
LocWorld: Building an Internationalization Plan; October 2011LocWorld: Building an Internationalization Plan; October 2011
LocWorld: Building an Internationalization Plan; October 2011Lingoport (www.lingoport.com)
 
Discovery delivery 中国软件技术大会2011
Discovery delivery 中国软件技术大会2011Discovery delivery 中国软件技术大会2011
Discovery delivery 中国软件技术大会2011Qiao Liang
 
Test driven development for infrastructure as-a-code, the future trend_Gianfr...
Test driven development for infrastructure as-a-code, the future trend_Gianfr...Test driven development for infrastructure as-a-code, the future trend_Gianfr...
Test driven development for infrastructure as-a-code, the future trend_Gianfr...Katherine Golovinova
 
David Nuescheler: Igniting CQ 5.3: What's New and Roadmap
David Nuescheler: Igniting CQ 5.3: What's New and RoadmapDavid Nuescheler: Igniting CQ 5.3: What's New and Roadmap
David Nuescheler: Igniting CQ 5.3: What's New and RoadmapDay Software
 

Similar to Poka yoke: The Science of Mistake Proofing in Software (20)

Testability for developers – Fighting a mess by making it testable
Testability for developers – Fighting a mess by making it testableTestability for developers – Fighting a mess by making it testable
Testability for developers – Fighting a mess by making it testable
 
Pangolin Datasheet
Pangolin DatasheetPangolin Datasheet
Pangolin Datasheet
 
How ANDROID TESTING changed how we think about Death - Second Edition
How ANDROID TESTING changed how we think about Death - Second EditionHow ANDROID TESTING changed how we think about Death - Second Edition
How ANDROID TESTING changed how we think about Death - Second Edition
 
How ANDROID TESTING changed how we think about Death - Second Edition
How ANDROID TESTING changed how we think about Death - Second EditionHow ANDROID TESTING changed how we think about Death - Second Edition
How ANDROID TESTING changed how we think about Death - Second Edition
 
Developer Productivity with Forge, Java EE 6 and Arquillian
Developer Productivity with Forge, Java EE 6 and ArquillianDeveloper Productivity with Forge, Java EE 6 and Arquillian
Developer Productivity with Forge, Java EE 6 and Arquillian
 
Webapp acceptance testing a case study
Webapp acceptance testing   a case studyWebapp acceptance testing   a case study
Webapp acceptance testing a case study
 
Coding Naked
Coding NakedCoding Naked
Coding Naked
 
Agile Software Design
Agile Software DesignAgile Software Design
Agile Software Design
 
Jenkins
JenkinsJenkins
Jenkins
 
baidu开发者大会 - Web App开发框架介绍以及分析
baidu开发者大会 - Web App开发框架介绍以及分析baidu开发者大会 - Web App开发框架介绍以及分析
baidu开发者大会 - Web App开发框架介绍以及分析
 
Class 6: Introduction to web technology entrepreneurship
Class 6: Introduction to web technology entrepreneurshipClass 6: Introduction to web technology entrepreneurship
Class 6: Introduction to web technology entrepreneurship
 
Continuous Delivery Overview
Continuous Delivery OverviewContinuous Delivery Overview
Continuous Delivery Overview
 
Automating good coding practices
Automating good coding practicesAutomating good coding practices
Automating good coding practices
 
Designing for Testability - Rohit Nayak
Designing for Testability - Rohit NayakDesigning for Testability - Rohit Nayak
Designing for Testability - Rohit Nayak
 
LocWorld: Building an Internationalization Plan; October 2011
LocWorld: Building an Internationalization Plan; October 2011LocWorld: Building an Internationalization Plan; October 2011
LocWorld: Building an Internationalization Plan; October 2011
 
Integreation
IntegreationIntegreation
Integreation
 
Discovery delivery 中国软件技术大会2011
Discovery delivery 中国软件技术大会2011Discovery delivery 中国软件技术大会2011
Discovery delivery 中国软件技术大会2011
 
What's new in Exchange 2013?
What's new in Exchange 2013?What's new in Exchange 2013?
What's new in Exchange 2013?
 
Test driven development for infrastructure as-a-code, the future trend_Gianfr...
Test driven development for infrastructure as-a-code, the future trend_Gianfr...Test driven development for infrastructure as-a-code, the future trend_Gianfr...
Test driven development for infrastructure as-a-code, the future trend_Gianfr...
 
David Nuescheler: Igniting CQ 5.3: What's New and Roadmap
David Nuescheler: Igniting CQ 5.3: What's New and RoadmapDavid Nuescheler: Igniting CQ 5.3: What's New and Roadmap
David Nuescheler: Igniting CQ 5.3: What's New and Roadmap
 

More from Gurpreet Luthra

Recipes for Continuous Delivery (ThoughtWorks Geeknight)
Recipes for Continuous Delivery (ThoughtWorks Geeknight)Recipes for Continuous Delivery (ThoughtWorks Geeknight)
Recipes for Continuous Delivery (ThoughtWorks Geeknight)Gurpreet Luthra
 
Bahmni - an open source hospital system
Bahmni - an open source hospital systemBahmni - an open source hospital system
Bahmni - an open source hospital systemGurpreet Luthra
 
Web Vulnerabilities - Building Basic Security Awareness
Web Vulnerabilities - Building Basic Security AwarenessWeb Vulnerabilities - Building Basic Security Awareness
Web Vulnerabilities - Building Basic Security AwarenessGurpreet Luthra
 
Lessons from Deploying an EMR in Rural India
Lessons from Deploying an EMR in Rural IndiaLessons from Deploying an EMR in Rural India
Lessons from Deploying an EMR in Rural IndiaGurpreet Luthra
 
Harnessing The Power of CDNs
Harnessing The Power of CDNsHarnessing The Power of CDNs
Harnessing The Power of CDNsGurpreet Luthra
 
Humanitarian Open Source Software
Humanitarian Open Source SoftwareHumanitarian Open Source Software
Humanitarian Open Source SoftwareGurpreet Luthra
 

More from Gurpreet Luthra (6)

Recipes for Continuous Delivery (ThoughtWorks Geeknight)
Recipes for Continuous Delivery (ThoughtWorks Geeknight)Recipes for Continuous Delivery (ThoughtWorks Geeknight)
Recipes for Continuous Delivery (ThoughtWorks Geeknight)
 
Bahmni - an open source hospital system
Bahmni - an open source hospital systemBahmni - an open source hospital system
Bahmni - an open source hospital system
 
Web Vulnerabilities - Building Basic Security Awareness
Web Vulnerabilities - Building Basic Security AwarenessWeb Vulnerabilities - Building Basic Security Awareness
Web Vulnerabilities - Building Basic Security Awareness
 
Lessons from Deploying an EMR in Rural India
Lessons from Deploying an EMR in Rural IndiaLessons from Deploying an EMR in Rural India
Lessons from Deploying an EMR in Rural India
 
Harnessing The Power of CDNs
Harnessing The Power of CDNsHarnessing The Power of CDNs
Harnessing The Power of CDNs
 
Humanitarian Open Source Software
Humanitarian Open Source SoftwareHumanitarian Open Source Software
Humanitarian Open Source Software
 

Recently uploaded

How to become a GDSC Lead GDSC MI AOE.pptx
How to become a GDSC Lead GDSC MI AOE.pptxHow to become a GDSC Lead GDSC MI AOE.pptx
How to become a GDSC Lead GDSC MI AOE.pptxKaustubhBhavsar6
 
UiPath Studio Web workshop series - Day 4
UiPath Studio Web workshop series - Day 4UiPath Studio Web workshop series - Day 4
UiPath Studio Web workshop series - Day 4DianaGray10
 
Q4 2023 Quarterly Investor Presentation - FINAL - v1.pdf
Q4 2023 Quarterly Investor Presentation - FINAL - v1.pdfQ4 2023 Quarterly Investor Presentation - FINAL - v1.pdf
Q4 2023 Quarterly Investor Presentation - FINAL - v1.pdfTejal81
 
Key Trends Shaping the Future of Infrastructure.pdf
Key Trends Shaping the Future of Infrastructure.pdfKey Trends Shaping the Future of Infrastructure.pdf
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
 
.NET 8 ChatBot with Azure OpenAI Services.pptx
.NET 8 ChatBot with Azure OpenAI Services.pptx.NET 8 ChatBot with Azure OpenAI Services.pptx
.NET 8 ChatBot with Azure OpenAI Services.pptxHansamali Gamage
 
Where developers are challenged, what developers want and where DevEx is going
Where developers are challenged, what developers want and where DevEx is goingWhere developers are challenged, what developers want and where DevEx is going
Where developers are challenged, what developers want and where DevEx is goingFrancesco Corti
 
Webinar: The Art of Prioritizing Your Product Roadmap by AWS Sr PM - Tech
Webinar: The Art of Prioritizing Your Product Roadmap by AWS Sr PM - TechWebinar: The Art of Prioritizing Your Product Roadmap by AWS Sr PM - Tech
Webinar: The Art of Prioritizing Your Product Roadmap by AWS Sr PM - TechProduct School
 
Emil Eifrem at GraphSummit Copenhagen 2024 - The Art of the Possible.pptx
Emil Eifrem at GraphSummit Copenhagen 2024 - The Art of the Possible.pptxEmil Eifrem at GraphSummit Copenhagen 2024 - The Art of the Possible.pptx
Emil Eifrem at GraphSummit Copenhagen 2024 - The Art of the Possible.pptxNeo4j
 
GraphSummit Copenhagen 2024 - Neo4j Vision and Roadmap.pptx
GraphSummit Copenhagen 2024 - Neo4j Vision and Roadmap.pptxGraphSummit Copenhagen 2024 - Neo4j Vision and Roadmap.pptx
GraphSummit Copenhagen 2024 - Neo4j Vision and Roadmap.pptxNeo4j
 
EMEA What is ThousandEyes? Webinar
EMEA What is ThousandEyes? WebinarEMEA What is ThousandEyes? Webinar
EMEA What is ThousandEyes? WebinarThousandEyes
 
LF Energy Webinar - Unveiling OpenEEMeter 4.0
LF Energy Webinar - Unveiling OpenEEMeter 4.0LF Energy Webinar - Unveiling OpenEEMeter 4.0
LF Energy Webinar - Unveiling OpenEEMeter 4.0DanBrown980551
 
IT Service Management (ITSM) Best Practices for Advanced Computing
IT Service Management (ITSM) Best Practices for Advanced ComputingIT Service Management (ITSM) Best Practices for Advanced Computing
IT Service Management (ITSM) Best Practices for Advanced ComputingMAGNIntelligence
 
Trailblazer Community - Flows Workshop (Session 2)
Trailblazer Community - Flows Workshop (Session 2)Trailblazer Community - Flows Workshop (Session 2)
Trailblazer Community - Flows Workshop (Session 2)Muhammad Tiham Siddiqui
 
Design and Modeling for MySQL SCALE 21X Pasadena, CA Mar 2024
Design and Modeling for MySQL SCALE 21X Pasadena, CA Mar 2024Design and Modeling for MySQL SCALE 21X Pasadena, CA Mar 2024
Design and Modeling for MySQL SCALE 21X Pasadena, CA Mar 2024Alkin Tezuysal
 
AI Workshops at Computers In Libraries 2024
AI Workshops at Computers In Libraries 2024AI Workshops at Computers In Libraries 2024
AI Workshops at Computers In Libraries 2024Brian Pichman
 
UiPath Studio Web workshop Series - Day 3
UiPath Studio Web workshop Series - Day 3UiPath Studio Web workshop Series - Day 3
UiPath Studio Web workshop Series - Day 3DianaGray10
 
2024.03.12 Cost drivers of cultivated meat production.pdf
2024.03.12 Cost drivers of cultivated meat production.pdf2024.03.12 Cost drivers of cultivated meat production.pdf
2024.03.12 Cost drivers of cultivated meat production.pdfThe Good Food Institute
 
Flow Control | Block Size | ST Min | First Frame
Flow Control | Block Size | ST Min | First FrameFlow Control | Block Size | ST Min | First Frame
Flow Control | Block Size | ST Min | First FrameKapil Thakar
 
Keep Your Finger on the Pulse of Your Building's Performance with IES Live
Keep Your Finger on the Pulse of Your Building's Performance with IES LiveKeep Your Finger on the Pulse of Your Building's Performance with IES Live
Keep Your Finger on the Pulse of Your Building's Performance with IES LiveIES VE
 
SIM INFORMATION SYSTEM: REVOLUTIONIZING DATA MANAGEMENT
SIM INFORMATION SYSTEM: REVOLUTIONIZING DATA MANAGEMENTSIM INFORMATION SYSTEM: REVOLUTIONIZING DATA MANAGEMENT
SIM INFORMATION SYSTEM: REVOLUTIONIZING DATA MANAGEMENTxtailishbaloch
 

Recently uploaded (20)

How to become a GDSC Lead GDSC MI AOE.pptx
How to become a GDSC Lead GDSC MI AOE.pptxHow to become a GDSC Lead GDSC MI AOE.pptx
How to become a GDSC Lead GDSC MI AOE.pptx
 
UiPath Studio Web workshop series - Day 4
UiPath Studio Web workshop series - Day 4UiPath Studio Web workshop series - Day 4
UiPath Studio Web workshop series - Day 4
 
Q4 2023 Quarterly Investor Presentation - FINAL - v1.pdf
Q4 2023 Quarterly Investor Presentation - FINAL - v1.pdfQ4 2023 Quarterly Investor Presentation - FINAL - v1.pdf
Q4 2023 Quarterly Investor Presentation - FINAL - v1.pdf
 
Key Trends Shaping the Future of Infrastructure.pdf
Key Trends Shaping the Future of Infrastructure.pdfKey Trends Shaping the Future of Infrastructure.pdf
Key Trends Shaping the Future of Infrastructure.pdf
 
.NET 8 ChatBot with Azure OpenAI Services.pptx
.NET 8 ChatBot with Azure OpenAI Services.pptx.NET 8 ChatBot with Azure OpenAI Services.pptx
.NET 8 ChatBot with Azure OpenAI Services.pptx
 
Where developers are challenged, what developers want and where DevEx is going
Where developers are challenged, what developers want and where DevEx is goingWhere developers are challenged, what developers want and where DevEx is going
Where developers are challenged, what developers want and where DevEx is going
 
Webinar: The Art of Prioritizing Your Product Roadmap by AWS Sr PM - Tech
Webinar: The Art of Prioritizing Your Product Roadmap by AWS Sr PM - TechWebinar: The Art of Prioritizing Your Product Roadmap by AWS Sr PM - Tech
Webinar: The Art of Prioritizing Your Product Roadmap by AWS Sr PM - Tech
 
Emil Eifrem at GraphSummit Copenhagen 2024 - The Art of the Possible.pptx
Emil Eifrem at GraphSummit Copenhagen 2024 - The Art of the Possible.pptxEmil Eifrem at GraphSummit Copenhagen 2024 - The Art of the Possible.pptx
Emil Eifrem at GraphSummit Copenhagen 2024 - The Art of the Possible.pptx
 
GraphSummit Copenhagen 2024 - Neo4j Vision and Roadmap.pptx
GraphSummit Copenhagen 2024 - Neo4j Vision and Roadmap.pptxGraphSummit Copenhagen 2024 - Neo4j Vision and Roadmap.pptx
GraphSummit Copenhagen 2024 - Neo4j Vision and Roadmap.pptx
 
EMEA What is ThousandEyes? Webinar
EMEA What is ThousandEyes? WebinarEMEA What is ThousandEyes? Webinar
EMEA What is ThousandEyes? Webinar
 
LF Energy Webinar - Unveiling OpenEEMeter 4.0
LF Energy Webinar - Unveiling OpenEEMeter 4.0LF Energy Webinar - Unveiling OpenEEMeter 4.0
LF Energy Webinar - Unveiling OpenEEMeter 4.0
 
IT Service Management (ITSM) Best Practices for Advanced Computing
IT Service Management (ITSM) Best Practices for Advanced ComputingIT Service Management (ITSM) Best Practices for Advanced Computing
IT Service Management (ITSM) Best Practices for Advanced Computing
 
Trailblazer Community - Flows Workshop (Session 2)
Trailblazer Community - Flows Workshop (Session 2)Trailblazer Community - Flows Workshop (Session 2)
Trailblazer Community - Flows Workshop (Session 2)
 
Design and Modeling for MySQL SCALE 21X Pasadena, CA Mar 2024
Design and Modeling for MySQL SCALE 21X Pasadena, CA Mar 2024Design and Modeling for MySQL SCALE 21X Pasadena, CA Mar 2024
Design and Modeling for MySQL SCALE 21X Pasadena, CA Mar 2024
 
AI Workshops at Computers In Libraries 2024
AI Workshops at Computers In Libraries 2024AI Workshops at Computers In Libraries 2024
AI Workshops at Computers In Libraries 2024
 
UiPath Studio Web workshop Series - Day 3
UiPath Studio Web workshop Series - Day 3UiPath Studio Web workshop Series - Day 3
UiPath Studio Web workshop Series - Day 3
 
2024.03.12 Cost drivers of cultivated meat production.pdf
2024.03.12 Cost drivers of cultivated meat production.pdf2024.03.12 Cost drivers of cultivated meat production.pdf
2024.03.12 Cost drivers of cultivated meat production.pdf
 
Flow Control | Block Size | ST Min | First Frame
Flow Control | Block Size | ST Min | First FrameFlow Control | Block Size | ST Min | First Frame
Flow Control | Block Size | ST Min | First Frame
 
Keep Your Finger on the Pulse of Your Building's Performance with IES Live
Keep Your Finger on the Pulse of Your Building's Performance with IES LiveKeep Your Finger on the Pulse of Your Building's Performance with IES Live
Keep Your Finger on the Pulse of Your Building's Performance with IES Live
 
SIM INFORMATION SYSTEM: REVOLUTIONIZING DATA MANAGEMENT
SIM INFORMATION SYSTEM: REVOLUTIONIZING DATA MANAGEMENTSIM INFORMATION SYSTEM: REVOLUTIONIZING DATA MANAGEMENT
SIM INFORMATION SYSTEM: REVOLUTIONIZING DATA MANAGEMENT
 

Poka yoke: The Science of Mistake Proofing in Software

Editor's Notes

  1. Introduce
  2. Process is designed in a manner that you cannot make mistakes – CONTROL..WARNING: Will immediately catch the mistake and give you a warning.
  3. PART OF THE PROCESS. While pushing, automatically with the weight of the person – it would move forward.
  4. Control poke wasn’t a good idea here!
  5. 2 MINUTESPassword entered: Passw0rd
  6. 2 MINUTESPassword entered: Passw0rd
  7. 2 MINUTESPassword entered: Passw0rd
  8. 1 MINUTE
  9. 2 MINUTE
  10. 3 MINUTES
  11. 4 MINUTESnstead of passing Primitives around, pass “Types” like money, so that you can control what operations can be performed on the data. If you couple it with immutability, then you can be sure that intermediate layers don’t inadvertently modify the object.
  12. 4 MINUTES
  13. Instead of passing Primitives around, pass “Types” like money, so that you can control what operations can be performed on the data. If you couple it with immutability, then you can be sure that intermediate layers don’t inadvertently modify the object.3 MINUTES