If-parsing connect activity

• The image shows what this activity might look like in Miro or Mural
• The solutions are on the next slide
• The text is in the slide notes

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

If-parsing connect activity - solutions

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

Lift Up Conditional: Learning Hour

• This deck has been created to provide useful resources for anyone presenting the “Lift Up Conditional” learning hour
• The main web page summarising this learning hour can be found on the Samman site here: [INSERT LINK]

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

Lift Up Conditional

Situation:

• Entangled if statements�

Strategy:

• For each condition:
• Duplicate entangled code inside if..else
• Simplify all contained conditions�

Result:

• A switch statement with a separate case for each condition

​

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

The next slide shows the Gilded Rose C# code before and after using the lift-up conditional technique

• They are low resolution – I plan to replace them with higher resolution images (or you can do that yourself using the code, or just show the actual code)
• The code, with a separate commit for each small step in the process, is here: https://github.com/claresudbery/GildedRose-Refactoring-Kata/tree/csharp-liftup-demo
• The tests were passing at each commit
• This branch provides a starting point for the exercise in C#: https://github.com/claresudbery/GildedRose-Refactoring-Kata/tree/csharp-liftup-start
• There is a video of me (Clare Sudbery) demoing the technique here: https://vimeo.com/801311948/41a83a3c4e

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

The next two slides give a simple visual explanation of the technique

• If you are planning to dedicate only one hour to this activity, I suggest you use one of these in preference over the more detailed explanation that follows, as the detailed version will probably take too long.

Lift up conditional

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

Simple schematic for sharing

License: CC-BY-SA-4.0. Attribution: Clare Sudbery, Xavi Ametller and sammancoaching.org

Simple schematic for sharing – includes end state

License: CC-BY-SA-4.0. Attribution: Clare Sudbery, Xavi Ametller and sammancoaching.org

The next set of slides give a more detailed visual explanation of the technique

• If you are planning to dedicate more than one hour to this activity, you can take the time to use these. Otherwise I suggest you use one of the simpler schematics in previous slides, as the detailed version will probably take too long.

Lift up conditional

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

Starting point

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

END RESULT Part 1 - Tidied if statement

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

END RESULT Part 2 - Switch statement (ready for polymorphism)

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

STEP 1 - Duplicate nasty code inside if..else

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

STEP 2 - Replace relevant conditions with true / false

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

STEP 3 - Remove falses

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

STEP 4 - Remove unnecessary conditions

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

BACK TO STEP 1 - Duplicate code inside if..else

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

STEP 2 - Replace relevant conditions with true / false

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

STEP 3 - Remove falses

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

STEP 4 - Remove unnecessary conditions

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

Start again. STEP 1 - Duplicate nasty code inside if..else

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

STEP 2 - Replace relevant conditions with true/false

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

STEP 3 - Remove falses

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

STEP 4 - Remove unnecessary conditions

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

END RESULT Part 1 - Tidied if statement

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

END RESULT Part 2 - Switch statement (ready for polymorphism)

License: CC-BY-SA-4.0. Attribution: Clare Sudbery and sammancoaching.org

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