Places in code with 6 or more lines that are exactly the same.
Intro
- For duplication, we look at places in code where there are 6 or more lines of code that are exactly the same.
- Before duplication is calculated, the code is cleaned to remove empty lines, comments, and frequently duplicated constructs such as imports.
- You should aim at having as little as possible (<5%) of duplicated code as high-level of duplication can lead to maintenance difficulties, poor factoring, and logical contradictions.
- To learn more about duplications and techniques for eliminating duplication, Sokrates recommends the following resources:
- Avoid Repetition, MartinFlower.com (IEEE Software article)
- Refactoring duplicated code, sourcemaking.com
- Beck Design Rules, MartinFowler.com
- DRY (Don't Repeat Yourself) Principle, Wikipedia
- The Cut-and-Paste Programming Software Development Anti-Pattern, sourcemaking.com
- Code Smells / Duplicated Code, Jeff Atwood, codinghorror.com:
- "Duplicated code is the bane of software development. Stamp out duplication whenever possible. You should always be on the lookout for more subtle cases of near-duplication, too. Don't Repeat Yourself!"
- Reducing Coupling, MartinFlower.com (IEEE Software article):
- "There are several ways to describe coupling, but it boils down to this: If changing one module in a program requires changing another module, then coupling exists. ... Duplication always implies coupling, because changing one piece of duplicate code implies changing the other."
Duplication Overall
- 17% duplication:
- 37,569 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 6,459 duplicated lines
- 2,457 duplicates
Duplication per Extension
Duplication per Component (primary)
Duplication Between Components (50+ lines)
Open 3D force graph...
Show more details on duplication between components...
From Component
--> To Component
Duplicated
Lines
File Pairs
Details
ComponentKit (<1%)
--> ComponentKitTests (<1%)
94
7 file pairs
details...
ComponentKitApplicationTests (<1%)
--> ComponentKitTests (<1%)
54
1 file pair
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| ComponentKit (<1%) --> ComponentKitTests (<1%) |
94 | 7 file pairs | details... |
| ComponentKitApplicationTests (<1%) --> ComponentKitTests (<1%) |
54 | 1 file pair | details... |
Longest Duplicates
The list of 50 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 35 | x 2 | ComponentKit/Transaction...Sources/Common/InternalComponentKit/Transaction...Sources/Common/Internal | 165:209 (13%)155:200 (7%) | view | |
| 28 | x 2 | ComponentKitTestsComponentKitTests | 143:181 (13%)187:225 (13%) | view | |
| 24 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 1177:1202 (2%)1238:1263 (2%) | view | |
| 22 | x 2 | ComponentKitTestsComponentKitTests | 255:281 (3%)354:382 (3%) | view | |
| 22 | x 2 | ComponentKitApplicationTestsComponentKitApplicationTests | 365:388 (<1%)437:460 (<1%) | view | |
| 22 | x 2 | ComponentKitApplicationTestsComponentKitApplicationTests | 365:388 (<1%)403:426 (<1%) | view | |
| 22 | x 2 | ComponentKitApplicationTestsComponentKitApplicationTests | 403:426 (<1%)437:460 (<1%) | view | |
| 22 | x 2 | ComponentKit/Transaction...Sources/Common/InternalComponentKit/Transaction...Sources/Common/Internal | 61:86 (38%)72:98 (32%) | view | |
| 22 | x 2 | ComponentKitTests/StatefulViewsComponentKitTests/StatefulViews | 384:410 (5%)424:450 (5%) | view | |
| 21 | x 2 | ComponentKit/Transaction...Sources/Common/InternalComponentKit/Transaction...Sources/Common/Internal | 78:108 (36%)92:122 (30%) | view | |
| 21 | x 2 | ComponentKitApplicationTestsComponentKitApplicationTests | 1664:1689 (<1%)1706:1731 (<1%) | view | |
| 21 | x 2 | ComponentKitApplicationTestsComponentKitApplicationTests | 1622:1647 (<1%)1706:1731 (<1%) | view | |
| 21 | x 2 | ComponentKitApplicationTestsComponentKitApplicationTests | 1622:1647 (<1%)1664:1689 (<1%) | view | |
| 21 | x 2 | ComponentKitTests/StatefulViewsComponentKitTests/StatefulViews | 308:331 (5%)354:377 (5%) | view | |
| 19 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 547:566 (3%)604:623 (3%) | view | |
| 19 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 529:547 (1%)556:574 (1%) | view | |
| 18 | x 2 | ComponentKitApplicationTestsComponentKitApplicationTests | 604:626 (<1%)683:705 (<1%) | view | |
| 18 | x 2 | ComponentKitApplicationTestsComponentKitApplicationTests | 580:602 (<1%)659:681 (<1%) | view | |
| 18 | x 2 | ComponentKitApplicationTestsComponentKitApplicationTests | 525:547 (<1%)604:626 (<1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 447:464 (1%)529:546 (1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 447:464 (1%)556:573 (1%) | view | |
| 18 | x 2 | ComponentKitApplicationTestsComponentKitApplicationTests | 525:547 (<1%)683:705 (<1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 422:439 (1%)447:464 (1%) | view | |
| 18 | x 2 | ComponentKitApplicationTestsComponentKitApplicationTests | 501:523 (<1%)659:681 (<1%) | view | |
| 18 | x 2 | ComponentKitTestsComponentKitTests | 434:455 (3%)467:488 (3%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 397:414 (1%)556:573 (1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 397:414 (1%)529:546 (1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 372:389 (1%)529:546 (1%) | view | |
| 18 | x 2 | ComponentKitApplicationTestsComponentKitApplicationTests | 501:523 (<1%)580:602 (<1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 372:389 (1%)556:573 (1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 422:439 (1%)529:546 (1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 422:439 (1%)556:573 (1%) | view | |
| 18 | x 2 | ComponentKit/Transaction...Sources/Common/InternalComponentKit/Transaction...Sources/Common/Internal | 123:142 (6%)122:141 (4%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 372:389 (1%)397:414 (1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 347:364 (1%)529:546 (1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 372:389 (1%)422:439 (1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 347:364 (1%)556:573 (1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 372:389 (1%)447:464 (1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 347:364 (1%)397:414 (1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 397:414 (1%)447:464 (1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 347:364 (1%)422:439 (1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 397:414 (1%)422:439 (1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 347:364 (1%)447:464 (1%) | view | |
| 18 | x 2 | ComponentKitTests/TransactionalDataSourceComponentKitTests/TransactionalDataSource | 347:364 (1%)372:389 (1%) | view | |
| 17 | x 2 | ComponentKitTestsComponentKitTests | 255:276 (2%)399:422 (2%) | view | |
| 17 | x 2 | ComponentKitTestsComponentKitTests | 410:429 (4%)458:478 (4%) | view | |
| 17 | x 2 | ComponentKitTestsComponentKitTests | 354:377 (2%)399:422 (2%) | view | |
| 16 | x 2 | ComponentKitTests/ScopeComponentKitTests/Scope | 683:703 (3%)709:729 (3%) | view | |
| 16 | x 2 | ComponentKitTests/ScopeComponentKitTests/Scope | 502:522 (3%)528:548 (3%) | view | |
| 15 | x 2 | ComponentKitTestsComponentKitTests | 434:450 (3%)458:475 (3%) | view |
