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
- 93% duplication:
- 9,942 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 9,282 duplicated lines
- 146 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
Source/IGListKit (74%)
--> spm/Sources/IGListKit (51%)
3694
9 file pairs
details...
Source/IGListKit/Internal (98%)
--> spm/Sources/IGListKit (46%)
3290
60 file pairs
details...
Source/IGListKit (21%)
--> spm/Sources/IGListKit/include (98%)
1088
28 file pairs
details...
Source/IGListDiffKit (79%)
--> spm/Sources/IGListDiffKit (93%)
922
8 file pairs
details...
Source/IGListDiffKit (18%)
--> spm/Sources/IGListDiffKit/include (88%)
210
8 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| Source/IGListKit (74%) --> spm/Sources/IGListKit (51%) |
3694 | 9 file pairs | details... |
| Source/IGListKit/Internal (98%) --> spm/Sources/IGListKit (46%) |
3290 | 60 file pairs | details... |
| Source/IGListKit (21%) --> spm/Sources/IGListKit/include (98%) |
1088 | 28 file pairs | details... |
| Source/IGListDiffKit (79%) --> spm/Sources/IGListDiffKit (93%) |
922 | 8 file pairs | details... |
| Source/IGListDiffKit (18%) --> spm/Sources/IGListDiffKit/include (88%) |
210 | 8 file pairs | details... |
Longest Duplicates
The list of 50 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 928 | x 2 | Source/IGListKitspm/Sources/IGListKit | 26:1504 (100%)26:1504 (100%) | view | |
| 401 | x 2 | Source/IGListKitspm/Sources/IGListKit | 23:699 (100%)23:699 (100%) | view | |
| 203 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 30:354 (100%)30:354 (100%) | view | |
| 200 | x 2 | Source/IGListDiffKitspm/Sources/IGListDiffKit | 24:329 (100%)24:329 (100%) | view | |
| 196 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 21:352 (100%)21:352 (100%) | view | |
| 191 | x 2 | Source/IGListKitspm/Sources/IGListKit | 25:335 (100%)25:335 (100%) | view | |
| 110 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 17:192 (100%)17:192 (100%) | view | |
| 110 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 15:195 (100%)15:195 (100%) | view | |
| 88 | x 2 | Source/IGListDiffKitspm/Sources/IGListDiffKit | 21:157 (100%)21:157 (100%) | view | |
| 86 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 18:161 (100%)18:161 (100%) | view | |
| 85 | x 2 | Source/IGListKitspm/Sources/IGListKit | 19:157 (100%)19:157 (100%) | view | |
| 82 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 21:156 (100%)21:156 (100%) | view | |
| 79 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 25:130 (100%)25:130 (100%) | view | |
| 74 | x 2 | Source/IGListKitspm/Sources/IGListKit | 17:121 (100%)17:121 (100%) | view | |
| 74 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 20:125 (100%)20:125 (100%) | view | |
| 69 | x 2 | Source/IGListKitspm/Sources/IGListKit | 18:132 (100%)18:132 (100%) | view | |
| 64 | x 2 | Source/IGListKitspm/Sources/IGListKit/include | 18:323 (100%)18:323 (100%) | view | |
| 62 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 12:132 (100%)12:132 (100%) | view | |
| 56 | x 2 | Source/IGListDiffKitspm/Sources/IGListDiffKit | 11:93 (100%)11:93 (100%) | view | |
| 54 | x 2 | Source/IGListDiffKitspm/Sources/IGListDiffKit | 11:91 (100%)11:91 (100%) | view | |
| 53 | x 2 | Source/IGListKitspm/Sources/IGListKit/include | 25:340 (100%)25:340 (100%) | view | |
| 51 | x 2 | Source/IGListKitspm/Sources/IGListKit/include | 10:201 (100%)10:201 (100%) | view | |
| 50 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 22:100 (100%)22:100 (100%) | view | |
| 49 | x 2 | Source/IGListKitspm/Sources/IGListKit/include | 16:194 (100%)16:194 (100%) | view | |
| 45 | x 2 | Source/IGListKitspm/Sources/IGListKit | 10:87 (100%)10:87 (100%) | view | |
| 44 | x 2 | Source/IGListKitspm/Sources/IGListKit | 13:105 (100%)13:105 (100%) | view | |
| 41 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 10:106 (100%)10:106 (100%) | view | |
| 39 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 16:76 (100%)16:76 (100%) | view | |
| 36 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 18:87 (100%)18:87 (100%) | view | |
| 32 | x 2 | Source/IGListKitspm/Sources/IGListKit/include | 18:149 (100%)18:149 (100%) | view | |
| 30 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 15:53 (100%)15:53 (100%) | view | |
| 30 | x 2 | Source/IGListKitspm/Sources/IGListKit/include | 17:262 (100%)17:262 (100%) | view | |
| 28 | x 2 | Source/IGListDiffKitspm/Sources/IGListDiffKit | 10:52 (100%)10:52 (100%) | view | |
| 26 | x 2 | Source/IGListKitspm/Sources/IGListKit/include | 10:109 (100%)10:109 (100%) | view | |
| 26 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 16:91 (100%)16:91 (100%) | view | |
| 25 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 12:45 (100%)12:45 (100%) | view | |
| 25 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 24:97 (100%)24:97 (100%) | view | |
| 23 | x 2 | Source/IGListDiffKitspm/Sources/IGListDiffKit | 10:46 (100%)10:46 (100%) | view | |
| 22 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 16:47 (100%)16:47 (100%) | view | |
| 22 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 10:35 (100%)10:35 (100%) | view | |
| 22 | x 2 | Source/IGListDiffKitspm/Sources/IGListDiffKit/include | 14:93 (100%)14:93 (100%) | view | |
| 21 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 19:54 (100%)19:54 (100%) | view | |
| 19 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 16:119 (100%)16:119 (100%) | view | |
| 19 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 10:34 (100%)10:34 (100%) | view | |
| 18 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 24:48 (100%)24:48 (100%) | view | |
| 18 | x 2 | Source/IGListKitspm/Sources/IGListKit/include | 10:66 (100%)10:66 (100%) | view | |
| 17 | x 2 | Source/IGListKitspm/Sources/IGListKit/include | 18:140 (100%)18:140 (100%) | view | |
| 17 | x 2 | Source/IGListDiffKitspm/Sources/IGListDiffKit/include | 14:63 (100%)14:63 (100%) | view | |
| 17 | x 2 | Source/IGListKitspm/Sources/IGListKit/include | 10:111 (100%)10:111 (100%) | view | |
| 16 | x 2 | Source/IGListKit/Internalspm/Sources/IGListKit | 10:38 (100%)10:38 (100%) | view |
Duplicated Units
The list of top 8 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 163 | x 2 | spm/Sources/IGListDiffKitSource/IGListDiffKit | 93:316 93:316 | view | |
| 20 | x 2 | spm/Sources/IGListKitSource/IGListKit/Internal | 22:48 22:48 | view | |
| 19 | x 2 | spm/Sources/IGListKitSource/IGListKit/Internal | 25:49 25:49 | view | |
| 13 | x 2 | spm/Sources/IGListKitSource/IGListKit | 127:142 127:142 | view | |
| 8 | x 2 | spm/Sources/IGListKitSource/IGListKit | 76:86 76:86 | view | |
| 7 | x 2 | spm/Sources/IGListDiffKitSource/IGListDiffKit | 64:72 64:72 | view | |
| 6 | x 2 | spm/Sources/IGListDiffKitSource/IGListDiffKit | 21:31 21:31 | view | |
| 6 | x 2 | spm/Sources/IGListDiffKitSource/IGListDiffKit | 74:81 74:81 | view |