ClausPolanka / gilded-rose-kotlin

This is the source code and slides for the Gilded Rose Refactoring Kata talk at KotlinConf 2023

This is the source code and slides for the Gilded Rose Refactoring Kata talk.

Links

• Gilded Rose Refactoring Kata — https://github.com/emilybache/GildedRose-Refactoring-Kata
• Limited WIP plugin (includes "Commit Without Dialog" action) — https://github.com/dkandalov/limited-wip (see also YOW! 2011 Joshua Kerievsky - The Limited Red Society)
• Quick Fix plugin — https://github.com/dkandalov/quick-fix
• IJKL shortcuts plugin — https://github.com/dkandalov/ijkl-shortcuts-plugin
• Refactoring book — https://martinfowler.com/books/refactoring.html
• Software Design: Tidy First? — https://tidyfirst.substack.com
• Duncan McGregor on YouTube — https://www.youtube.com/@RefactoringDuncan
• Duncan McGregor: How to Refactor Using the Open-Closed Principle — https://www.youtube.com/watch?v=sUhGbdnNil4
• Dmitry on YouTube — https://www.youtube.com/@DmitryKandalov
• Dmitry's blog — https://dmitrykandalov.com

IDE refactorings used in the talk

• Replace 'until' with '..' operator
• Put parameters on one/separate lines
• Convert 'String' concatenation to template
• Convert to expression body
• Extract function
• Introduce parameter
• Convert parameter to receiver
• Replace 'for' with a 'forEach' function call
• Convert lambda to reference
• Replace with '+='
• Remove braces from 'if' statement
• Merge 'if's
• Invert 'if' condition
• Remove braces from 'else' statement
• Flip '&&'
• Split 'if' into two
• Replace 'if' with 'when'
• Remove braces from all 'when' entries
• Lift assignment out of 'if'
• Split 'if' into two
• Simplify/delete expression
• Replace '+=' with ordinary assignment
• Replace 'when' with 'if'
• Lift function call out of 'if'
• Convert function to property
• Inline function
• Lift return out of 'if'

Shortcuts used in the talk

Recorded using Activity Tracker plugin.

• Alt I – Up
• Alt J – Previous word
• Alt K – Down
• Alt L – Next word
• Alt U – Line start
• Alt O – Line end
• Alt N – Left
• Alt M – Right

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• Alt Shift I – Up with selection
• Alt Shift J – Previous word with selection
• Alt Shift K – Down with selection
• Alt Shift L – Next word with selection
• Alt Shift U – Line start with selection
• Alt Shift O – Line end with selection
• Alt Shift N – Left with selection
• Alt Shift M – Right with selection

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• Alt , – Previous method
• Alt . – Next method
• Alt F – Page down
• Alt W – Page up
• Alt B – Back
• Alt Shift B – Forward
• Alt H – Jump to source

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• Alt A – Highlight usages in file
• Alt S – Show usages
• Alt E – Expand selection
• Alt / – Cycle expand word
• Alt ; – Delete
• Alt R – Rename
• Alt Shift 8 – Put parameters on one line
• Alt Shift 9 – Put parameters on separate lines

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• Cmd - – Collapse
• Cmd = – Expand
• Cmd Alt - – Collapse recursively
• Cmd Alt = – Expand recursively
• Cmd Shift - – Collapse all
• Cmd Shift = – Expand all

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• Cmd Alt V – Introduce variable
• Cmd Alt P – Introduce parameter
• Cmd Alt M – Extract method
• Cmd Alt N – Inline
• Cmd Alt L – Reformat code
• Ctrl Shift J – Join lines

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• Cmd M – Scroll to center
• Cmd Alt Shift I – Move statement up
• Cmd Alt Shift K – Move statement down
• Cmd Shift 8 – Column selection mode
• Cmd Shift A – Find action
• Cmd K – Commit
• Cmd S – Limited WIP | Commit without dialog

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• Ctrl Tab – Switcher
• Ctrl G – Add selection for next occurrence
• Ctrl B – Git | Branches
• Ctrl Cmd H – Notifications | Close first
• Ctrl V – VCS operations popup
• Ctrl Shift P – Show type info
• Shift Enter – Start new line
• Shift Escape – Hide active tool window

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• Shift F10 – Run
• Alt Shift F10 – Run... (popup)