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Articles by Joël Quenneville

  1. Fewer Operations on Custom Types is Valuable

    Less is more. Wrapping primitives in custom types restricts your available operations and that’s a good thing.

    Joël Quenneville
    October 11, 2021
    • Elm
    • Ruby
    • Web
  2. Who is empowered by your API design?

    Analysing API design through lens of skill floors and ceilings can help us think about the impact of adding a feature.

    Joël Quenneville
    October 7, 2021
    • Design
    • Web
    • F#
  3. Testing Your Edge Cases

    A little combination math goes a long way to catching edge cases.

    Joël Quenneville
    September 8, 2021
    • Testing
    • Ruby
    • Development
  4. Back to Basics: Boolean Expressions

    Write Boolean expressions using operators instead of if/else for a more readable outcome.

    Joël Quenneville
    June 28, 2021
    • Back To Basics
    • Ruby
    • Development
    • Web
  5. Pipeline Decoders in Elm

    What’s the difference between Elm’s classical and pipeline JSON decoders?

    Joël Quenneville
    May 19, 2021
    • Elm
    • Functional Programming
    • Web
  6. Running Out of Maps

    What happens when you need a bigger mapN?

    Joël Quenneville
    May 12, 2021
    • Elm
    • Web
    • Functional Programming
  7. Classical Reasoning and Debugging

    Classical philosophy offers us multiple reasoning strategies for dealing with tricky bugs.

    Joël Quenneville
    April 30, 2021
    • Debugging
    • Debugging Series 2021
  8. Debugging: Listing Your Assumptions

    Kick-start your debugging process by turning implicit assumptions into explicit ones.

    Joël Quenneville
    April 16, 2021
    • Debugging
    • Debugging Series 2021
  9. Simplifying Tests by Extracting Side-Effects

    Test-driven development, object-oriented design, and functional programming converge on some similar ideas.

    Joël Quenneville
    February 18, 2021
    • Web
    • Ruby
    • TDD
    • Testing
    • Functional Programming
    • Good Code
  10. Testing Objects with a Functional Mindset

    Some ideas from functional programming can help us improve the unit tests for our object-oriented code.

    Joël Quenneville
    January 19, 2021
    • Web
    • Functional Programming
    • Testing
    • Good Code
    • Ruby
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