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Data Clump
In general, a Data Clump occurs when the same two or three items frequently appear together in classes and parameter lists, or when a group of instance variable names start or end with similar substrings.
The recurrence of the items often means there is duplicate code spread around to handle them. There may be an abstraction missing from the code, making the system harder to understand.
Current Support in Reek
The Data Clump detector is new in Reek version 1.1.3.15
Currently Reek looks for a group of two or more parameters with the same names that are expected by three or more methods of a class.
Configuration
Reek’s Data Clump detector currently offers the Basic Smell Options, plus:
| Option | Value | Effect |
|---|---|---|
max_copies |
integer | The maximum number of methods that are permitted to take the same group of parameters. Defaults to 2. |
min_clump_size |
integer | The smallest number of parameters that can be reported as a clump. Defaults to 2. |
Pages
- Attribute
- Basic Smell Options
- Class Variable
- Code Smells
- Command-Line Options
- Configuration Files
- Control Couple
- Data Clump
- Duplication
- Feature Envy
- Getting Started
- Home
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- Large Class
- Long Method
- Long Parameter List
- Mailing List
- Nested Iterators
- Non-ASCII source files
- Project Dashboard
- Rake Task
- RDoc
- Reek-Driven Development
- Ruby 1.9
- Simulated Polymorphism
- Uncommunicative Name
- Utility Function
- Working with Rails
