https://github.com/kanaka/mal/blob/master/process/guide.md

https://docs.google.com/presentation/d/14PiMsvqs7f5A3_leDE07HoQkbHf_sUfuNHDShUMyT3A/edit#slide=id.g731d2a787_0_13

• Crash
• Enter debugger
• Throw exception
• Return special value
• Set error flag
• Recover, keep going

• Duplicate Observed Data
• Encapsulate Downcast
• Encapsulate Field
• Extract Interface
• Introduce Foreign Method
• Introduce Local Extension
• Pull Up Constructor Body
• Pull Up Field
• Push Down Field
• Replace Delegation with Inheritance
• Replace Type Code with Class
• Replace Type Code with Subclasses
• Add Parameter
• Change Bidirectional Association to Unidirectional
• Change Reference to Value
• Change Unidirectional Association to Bidirectional
• Change Value to Reference
• Collapse Hierarchy
• Consolidate Conditional Expression
• Consolidate Duplicate Conditional Fragments
• Decompose Conditional
• Dynamic Method Definition
• Eagerly Initialized Attribute
• Encapsulate Collection
• Extract Class
• Extract Method
• Extract Module
• Extract Subclass
• Extract Superclass
• Extract Surrounding Method
• Extract Variable
• Form Template Method
• Hide Delegate
• Hide Method
• Inline Class
• Inline Method
• Inline Module
• Inline Temp
• Introduce Assertion
• Introduce Class Annotation
• Introduce Expression Builder
• Introduce Gateway
• Introduce Named Parameter
• Introduce Null Object
• Introduce Parameter Object
• Isolate Dynamic Receptor
• Lazily Initialized Attribute
• Move Eval from Runtime to Parse Time
• Move Field
• Move Method
• Parameterize Method
• Preserve Whole Object
• Pull Up Method
• Push Down Method
• Recompose Conditional
• Remove Assignments to Parameters
• Remove Control Flag
• Remove Middle Man
• Remove Named Parameter
• Remove Parameter
• Remove Setting Method
• Remove Unused Default Parameter
• Rename Method
• Replace Abstract Superclass with Module
• Replace Array with Object
• Replace Conditional with Polymorphism
• Replace Constructor with Factory Method
• Replace Data Value with Object
• Replace Delegation With Hierarchy
• Replace Dynamic Receptor with Dynamic Method Definition
• Replace Error Code with Exception
• Replace Exception with Test
• Replace Hash with Object
• Replace Inheritance with Delegation
• Replace Loop with Collection Closure Method
• Replace Magic Number with Symbolic Constant
• Replace Method with Method Object
• Replace Nested Conditional with Guard Clauses
• Replace Parameter with Explicit Methods
• Replace Parameter with Method
• Replace Record with Data Class
• Replace Subclass with Fields
• Replace Temp with Chain
• Replace Temp with Query
• Replace Type Code with Module Extension
• Replace Type Code With Polymorphism
• Replace Type Code with State/Strategy
• Self Encapsulate Field
• Separate Query from Modifier
• Split Temporary Variable
• Substitute Algorithm