Identify and extract shared functionality between classes into reusable components. Code duplication increases maintenance burden and risk of inconsistent behavior when changes are needed.
Identify and extract shared functionality between classes into reusable components. Code duplication increases maintenance burden and risk of inconsistent behavior when changes are needed.
Use these approaches to eliminate duplication:
Example of problematic duplication:
// In NextEditService
fun triggerNextEdit() {
// Almost identical code to triggerCompletion() in AutocompleteService
// with minor differences
}
// In AutocompleteService
fun triggerCompletion() {
// Almost identical code to triggerNextEdit() in NextEditService
// with minor differences
}
Better approach:
// In a shared abstract base class or utility class
abstract class EditServiceBase {
protected fun triggerEdit(editType: String, parameters: Map<String, Any>) {
// Common implementation
}
}
// In concrete implementations
class NextEditService : EditServiceBase() {
fun triggerNextEdit() {
triggerEdit("nextEdit", specificParameters)
}
}
class AutocompleteService : EditServiceBase() {
fun triggerCompletion() {
triggerEdit("completion", specificParameters)
}
}
For data types with associated utilities, follow the pattern demonstrated in RangeInFileWithContents where data and its manipulation methods are encapsulated together.
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