GooleIOExtended2019_Toan_English.pdf

Transcript

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3. Agenda
   1. Some background contexts
   2. First line of Kotlin
   3. Adoption process
   4. Is it easy or not?
   5. Lessons learnt
   6. Where we are now?
   7. Questions
   

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4. Background contexts (facts)
   - Starting as MVP project in 5 months
   - All Java
   - “1-man project”
   - 1+ year since Kotlin official support from Google (May 2017)
   

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5. First line of Kotlin (1)
   July 27, 2018
   

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6. First line of Kotlin (2)
   July 27, 2018
   

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7. Adoption - phase 1 - “the honeymoon”
   - Enjoy the language features: data class, extension functions,
   out-of-the-box lambda support, collection API, Null-safety!!!,
   immutability support
   - Bit by bit: testing code, data object
   - The brevity vs the verbosity - clear winner!
   - Introduce the language with weighted risks - like you are
   driving your car at 60 mph
   

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8. Adoption - phase 2 - “spreading”
   - New components are written in Kotlin
   - Converting from Java to Kotlin is encouraged (but
   optional)
   - Supported by: code review process, pair-programming
   

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9. Adoption - phase 3 - “acceleration”
   - First factor: New hire with Kotlin filter (Belarus team expanding)
   - Refactoring:
   - Convert from java to Kotlin become a mandatory
   - New components are written in Kotlin as always
   

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10. Is it easy?
    1. Java inter-ops capability
    2. Rich API collections
    3. Reading it in a similar style with Java
    4. Functional concepts
    

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11. Lessons learnt
    - Pair-programming sessions help the adoption become team-friendly and less stressful
    - Guild to share the knowledge - via Code Review, filling-water talks,
    

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12. Where we are now?
    

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13. Questions
    

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14. Next session - Firechat
    

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