| Refactorings
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| Composing Methods
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Extract Method
• Inline Method
• Inline Temp
• Replace Temp with Query
• Replace Temp with Chain
• Introduce Explaining Variable
• Split Temporary Variable
• Remove Assignments to Parameters
• Replace Method with Method Object
• Substitute Algorithm
• Replace Loop with Collection Closure Method
• Extract Surrounding Method
• Introduce Class Annotation
• Introduce Named Parameter
• Remove Named Parameter
• Remove Unused Default Parameter
• Dynamic Method Definition
• Replace Dynamic Receptor with Dynamic Method Definition
• Isolate Dynamic Receptor
• Move Eval from Runtime to Parse Time
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| Moving Features Between Objects
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Move Method
• Move Field
• Extract Class
• Inline Class
• Hide Delegate
• Remove Middle Man
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| Organizing Data
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Self Encapsulate Field
• Replace Data Value with Object
• Change Value to Reference
• Change Reference to Value
• Replace Array with Object
• Replace Hash with Object
• Change Unidirectional Association to Bidirectional
• Change Bidirectional Association to Unidirectional
• Replace Magic Number with Symbolic Content
• Encapsulate Collection
• Replace Record with Data Class
• Replace Type Code with Polymorphism
• Replace Type Code with Module Extension
• Replace Type Code with State-Strategy
• Replace Subclass with Fields
• Lazily Initialized Atribute
• Eagerly Initialized Attribute
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| Simplifying Conditional Expressions
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Decompose Conditional
• Recompose Conditional
• Consolidate Conditional Expression
• Consolidate Duplicate Conditional Fragments
• Remove Control Flag
• Replace Nested Conditional with Guard Clauses
• Replace Conditional with Polymorphism
• Introduce Null Object
• Introduce Assertion
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| Making Method Calls Simpler
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Rename Method
• Add Parameter
• Remove Parameter
• Separate Query from Modifier
• Parameterize Method
• Replace Parameter with Explicit Methods
• Preserve Whole Object
• Replace Parameter with Method
• Introduce Parameter Object
• Remove Setting Method
• Hide Method
• Replace Constructor with Factory Method
• Replace Error Code with Exception
• Replace Exception with Test
• Introduce Gateway
• Introduce Expression Builder
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| Dealing with Generalization
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Pull Up Method
• Push Down Method
• Extract Module
• Inline Module
• Extract Subclass
• Introduce Inheritance
• Collapse Hierarchy
• Form Template Method
• Replace Inheritance with Delegation
• Replace Delegation with Hierarchy
• Replace Abstract Superclass with Module
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| Big Refactorings
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Tease Apart Inheritance
• Convert Procedural Design to Objects
• Separate Domain from Presentation
• Extract Hierarchy
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