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
- 18% duplication:
- 18,457 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 3,454 duplicated lines
- 780 duplicates
Duplication per Extension
Duplication per Component (primary)
Longest Duplicates
The list of 50 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 45 | x 2 | src/storiessrc/stories | 24:72 (39%)21:69 (42%) | view | |
| 41 | x 2 | src/storiessrc/stories | 46:90 (11%)97:141 (11%) | view | |
| 37 | x 2 | src/stories/ActionList2src/stories/ActionList2 | 367:403 (3%)448:484 (3%) | view | |
| 36 | x 2 | srcsrc/FormControl | 85:121 (37%)139:175 (22%) | view | |
| 33 | x 2 | src/FilteredActionListsrc/stories | 14:53 (61%)18:58 (10%) | view | |
| 32 | x 2 | src/stories/ActionList2src/stories/ActionList2 | 333:365 (3%)414:446 (3%) | view | |
| 28 | x 2 | src/storiessrc/stories | 187:217 (7%)258:288 (7%) | view | |
| 27 | x 2 | srcsrc | 84:113 (30%)88:117 (29%) | view | |
| 24 | x 2 | src/storiessrc/stories | 191:217 (6%)202:228 (9%) | view | |
| 24 | x 2 | src/storiessrc/stories | 92:116 (7%)263:287 (7%) | view | |
| 24 | x 2 | src/storiessrc/stories | 262:288 (6%)202:228 (9%) | view | |
| 23 | x 2 | src/stories/ActionMenu2src/stories/ActionMenu2 | 112:134 (4%)170:192 (4%) | view | |
| 23 | x 2 | src/storiessrc/stories | 157:180 (7%)189:212 (7%) | view | |
| 22 | x 2 | src/stories/ActionMenu2src/stories/ActionMenu2 | 38:59 (45%)111:132 (4%) | view | |
| 22 | x 2 | src/storiessrc/stories | 154:176 (7%)263:285 (7%) | view | |
| 22 | x 2 | src/storiessrc/stories | 92:114 (7%)154:176 (7%) | view | |
| 21 | x 2 | src/storiessrc/stories | 51:72 (18%)46:67 (18%) | view | |
| 21 | x 2 | src/stories/DropdownMenu2src/stories/DropdownMenu2 | 25:49 (9%)24:48 (7%) | view | |
| 21 | x 2 | src/stories/ActionMenu2src/stories/ActionMenu2 | 39:59 (43%)170:190 (4%) | view | |
| 21 | x 2 | src/storiessrc/stories | 48:69 (19%)46:67 (18%) | view | |
| 20 | x 2 | src/storiessrc/stories/ActionList2 | 29:52 (5%)45:68 (1%) | view | |
| 20 | x 2 | src/storiessrc/stories | 36:56 (3%)13:33 (17%) | view | |
| 19 | x 2 | src/storiessrc/stories | 189:208 (6%)266:285 (6%) | view | |
| 19 | x 2 | src/storiessrc/stories | 95:114 (6%)189:208 (6%) | view | |
| 18 | x 2 | src/storiessrc/stories | 62:79 (5%)244:261 (5%) | view | |
| 18 | x 2 | src/storiessrc/stories | 113:130 (5%)244:261 (5%) | view | |
| 18 | x 2 | src/storiessrc/stories | 70:87 (5%)101:118 (5%) | view | |
| 18 | x 2 | src/storiessrc/stories | 96:113 (3%)406:423 (3%) | view | |
| 18 | x 2 | src/storiessrc/stories | 159:178 (4%)236:255 (4%) | view | |
| 18 | x 2 | src/storiessrc/stories | 99:116 (3%)370:387 (3%) | view | |
| 17 | x 2 | srcsrc | 41:64 (19%)41:64 (18%) | view | |
| 17 | x 2 | src/storiessrc/stories | 293:309 (3%)409:425 (3%) | view | |
| 17 | x 2 | src/storiessrc/stories | 291:307 (3%)368:384 (3%) | view | |
| 16 | x 2 | src/stories/DropdownMenu2src/stories/DropdownMenu2 | 60:75 (7%)57:72 (5%) | view | |
| 16 | x 2 | src/stories/ActionList2src/stories/ActionList2 | 195:210 (5%)255:270 (1%) | view | |
| 16 | x 2 | src/stories/DropdownMenu2src/stories/DropdownMenu2 | 88:103 (7%)84:99 (5%) | view | |
| 16 | x 2 | src/storiessrc/stories/ActionList2 | 365:386 (4%)488:509 (1%) | view | |
| 16 | x 2 | src/storiessrc/stories | 291:306 (2%)446:461 (2%) | view | |
| 16 | x 2 | src/storiessrc/stories | 70:85 (5%)272:287 (5%) | view | |
| 16 | x 2 | src/storiessrc/stories | 136:160 (2%)201:225 (2%) | view | |
| 16 | x 2 | src/storiessrc/stories | 46:65 (4%)148:167 (4%) | view | |
| 16 | x 2 | src/storiessrc/stories | 97:116 (4%)148:167 (4%) | view | |
| 16 | x 2 | src/stories/ActionList2src/stories/ActionList2 | 212:227 (5%)272:287 (1%) | view | |
| 16 | x 2 | src/storiessrc/stories | 368:383 (2%)446:461 (2%) | view | |
| 15 | x 2 | src/storiessrc/stories | 11:27 (10%)21:37 (39%) | view | |
| 15 | x 2 | src/storiessrc/stories | 12:28 (11%)21:37 (39%) | view | |
| 15 | x 2 | src/storiessrc/stories | 64:78 (15%)92:106 (15%) | view | |
| 15 | x 2 | src/storiessrc/stories | 117:131 (4%)173:187 (4%) | view | |
| 15 | x 2 | src/storiessrc/stories | 370:384 (2%)409:423 (2%) | view | |
| 15 | x 2 | src/storiessrc/stories | 12:28 (11%)11:27 (10%) | view |
