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
- 15% duplication:
- 83,096 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 13,207 duplicated lines
- 1,861 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
FBAEMKit (2%)
--> FBSDKCoreKit (<1%)
387
10 file pairs
details...
FBSDKCoreKit (<1%)
--> FBSDKLoginKit (2%)
316
8 file pairs
details...
FBSDKCoreKit (<1%)
--> FBSDKShareKit (2%)
304
5 file pairs
details...
FBSDKCoreKit (<1%)
--> FBSDKGamingServicesKit (2%)
294
6 file pairs
details...
FBSDKGamingServicesKit (2%)
--> FBSDKShareKit (2%)
288
4 file pairs
details...
FBAEMKit (1%)
--> FBSDKGamingServicesKit (1%)
240
2 file pairs
details...
FBAEMKit (1%)
--> FBSDKShareKit (2%)
240
2 file pairs
details...
FBSDKLoginKit (<1%)
--> FBSDKShareKit (<1%)
80
1 file pair
details...
FBSDKLoginKit (<1%)
--> FBSDKTVOSKit (7%)
72
2 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| FBAEMKit (2%) --> FBSDKCoreKit (<1%) |
387 | 10 file pairs | details... |
| FBSDKCoreKit (<1%) --> FBSDKLoginKit (2%) |
316 | 8 file pairs | details... |
| FBSDKCoreKit (<1%) --> FBSDKShareKit (2%) |
304 | 5 file pairs | details... |
| FBSDKCoreKit (<1%) --> FBSDKGamingServicesKit (2%) |
294 | 6 file pairs | details... |
| FBSDKGamingServicesKit (2%) --> FBSDKShareKit (2%) |
288 | 4 file pairs | details... |
| FBAEMKit (1%) --> FBSDKGamingServicesKit (1%) |
240 | 2 file pairs | details... |
| FBAEMKit (1%) --> FBSDKShareKit (2%) |
240 | 2 file pairs | details... |
| FBSDKLoginKit (<1%) --> FBSDKShareKit (<1%) |
80 | 1 file pair | details... |
| FBSDKLoginKit (<1%) --> FBSDKTVOSKit (7%) |
72 | 2 file pairs | details... |
Longest Duplicates
The list of 50 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 95 | x 2 | FBSDKGamingServicesKit/FBSDKGamingServicesKitTestsFBSDKShareKit/FBSDKShareKitTests/Internal | 12:149 (98%)12:149 (98%) | view | |
| 95 | x 2 | FBSDKCoreKit/FBSDKCoreKitTests/InternalFBSDKShareKit/FBSDKShareKitTests/Internal | 12:149 (98%)12:149 (98%) | view | |
| 95 | x 2 | FBAEMKit/FBAEMKitTestsFBSDKGamingServicesKit/FBSDKGamingServicesKitTests | 12:149 (98%)12:149 (98%) | view | |
| 95 | x 2 | FBAEMKit/FBAEMKitTestsFBSDKCoreKit/FBSDKCoreKitTests/Internal | 12:149 (98%)12:149 (98%) | view | |
| 95 | x 2 | FBSDKCoreKit/FBSDKCoreKitTests/InternalFBSDKGamingServicesKit/FBSDKGamingServicesKitTests | 12:149 (98%)12:149 (98%) | view | |
| 95 | x 2 | FBAEMKit/FBAEMKitTestsFBSDKShareKit/FBSDKShareKitTests/Internal | 12:149 (98%)12:149 (98%) | view | |
| 68 | x 2 | FBSDKCoreKit/FBSDKCoreKit/Internal/ConfigurationFBSDKCoreKit/FBSDKCoreKit/Internal/Configuration | 156:225 (46%)62:131 (24%) | view | |
| 59 | x 2 | FBSDKCoreKit/FBSDKCoreKi...ppEvents/SuggestedEventFBSDKCoreKit/FBSDKCoreKi...ppEvents/SuggestedEvent | 39:97 (21%)123:181 (21%) | view | |
| 57 | x 2 | FBSDKCoreKitFBSDKCoreKit | 116:172 (15%)220:276 (15%) | view | |
| 40 | x 2 | FBSDKCoreKit/FBSDKCoreKi...nal/AppEvents/IntegrityFBSDKCoreKit/FBSDKCoreKi...nal/AppEvents/Integrity | 39:80 (10%)95:135 (10%) | view | |
| 36 | x 2 | FBSDKCoreKit/FBSDKCoreKitFBSDKCoreKit/FBSDKCoreKit | 124:159 (22%)203:238 (22%) | view | |
| 32 | x 2 | FBSDKCoreKit/FBSDKCoreKi...l/AppEvents/SKAdNetworkFBSDKCoreKit/FBSDKCoreKi...l/AppEvents/SKAdNetwork | 234:265 (9%)305:336 (9%) | view | |
| 29 | x 2 | FBSDKLoginKit/FBSDKLoginKitTestsFBSDKLoginKit/FBSDKLoginKitTests | 517:552 (2%)571:605 (2%) | view | |
| 28 | x 2 | FBSDKCoreKit/FBSDKCoreKitTests/Internal/BridgeAPIFBSDKCoreKit/FBSDKCoreKitTests/Internal/BridgeAPI | 173:201 (11%)243:271 (11%) | view | |
| 25 | x 2 | FBSDKCoreKit/FBSDKCoreKit/InternalFBSDKShareKit/FBSDKShareKit/Internal | 11:52 (100%)9:50 (100%) | view | |
| 25 | x 2 | FBAEMKit/FBAEMKitFBSDKCoreKit/FBSDKCoreKit/Internal | 9:50 (100%)11:52 (100%) | view | |
| 25 | x 2 | FBSDKLoginKit/FBSDKLoginKitTestsFBSDKLoginKit/FBSDKLoginKitTests | 825:852 (2%)869:896 (2%) | view | |
| 25 | x 2 | FBSDKGamingServicesKit/F...ingServicesKit/InternalFBSDKShareKit/FBSDKShareKit/Internal | 11:52 (100%)9:50 (100%) | view | |
| 25 | x 2 | FBAEMKit/FBAEMKitFBSDKShareKit/FBSDKShareKit/Internal | 9:50 (100%)9:50 (100%) | view | |
| 25 | x 2 | FBAEMKit/FBAEMKitFBSDKGamingServicesKit/F...ingServicesKit/Internal | 9:50 (100%)11:52 (100%) | view | |
| 25 | x 2 | FBSDKCoreKit/FBSDKCoreKit/InternalFBSDKGamingServicesKit/F...ingServicesKit/Internal | 11:52 (100%)11:52 (100%) | view | |
| 23 | x 2 | FBAEMKit/FBAEMKitTestsFBAEMKit/FBAEMKitTests | 105:127 (5%)131:154 (5%) | view | |
| 22 | x 2 | FBSDKCoreKit/FBSDKCoreKitTests/InternalFBSDKCoreKit/FBSDKCoreKitTests/Internal | 43:64 (8%)124:145 (8%) | view | |
| 22 | x 2 | FBSDKCoreKit/FBSDKCoreKitFBSDKCoreKit/FBSDKCoreKit/Internal/Device | 198:225 (13%)248:275 (10%) | view | |
| 22 | x 2 | FBSDKCoreKit/FBSDKCoreKitTestsFBSDKCoreKit/FBSDKCoreKitTests | 148:170 (2%)176:198 (2%) | view | |
| 22 | x 2 | FBAEMKit/FBAEMKitTestsFBAEMKit/FBAEMKitTests | 603:624 (2%)636:657 (2%) | view | |
| 22 | x 2 | FBSDKCoreKit/FBSDKCoreKi...l/AppEvents/SKAdNetworkFBSDKCoreKit/FBSDKCoreKi...l/AppEvents/SKAdNetwork | 87:108 (6%)267:288 (6%) | view | |
| 21 | x 2 | FBSDKLoginKit/FBSDKLoginKitTestsFBSDKLoginKit/FBSDKLoginKitTests | 713:734 (1%)877:899 (1%) | view | |
| 21 | x 2 | FBSDKCoreKit/FBSDKCoreKitTests/Internal/BridgeAPIFBSDKCoreKit/FBSDKCoreKitTests/Internal/BridgeAPI | 583:604 (2%)621:642 (2%) | view | |
| 21 | x 2 | FBSDKCoreKit/FBSDKCoreKitTests/Internal/BridgeAPIFBSDKCoreKit/FBSDKCoreKitTests/Internal/BridgeAPI | 660:681 (2%)699:720 (2%) | view | |
| 20 | x 2 | FBSDKCoreKit/FBSDKCoreKitTestsFBSDKCoreKit/FBSDKCoreKitTests | 120:140 (2%)175:195 (2%) | view | |
| 20 | x 2 | FBSDKCoreKit/FBSDKCoreKitTests/Internal/BridgeAPIFBSDKCoreKit/FBSDKCoreKitTests/Internal/BridgeAPI | 572:596 (2%)648:673 (2%) | view | |
| 20 | x 2 | FBSDKCoreKit/FBSDKCoreKitTests/Internal/BridgeAPIFBSDKCoreKit/FBSDKCoreKitTests/Internal/BridgeAPI | 610:634 (2%)687:712 (2%) | view | |
| 20 | x 2 | FBSDKCoreKit/FBSDKCoreKi...l/AppEvents/SKAdNetworkFBSDKCoreKit/FBSDKCoreKi...l/AppEvents/SKAdNetwork | 71:90 (6%)242:261 (6%) | view | |
| 20 | x 2 | FBSDKCoreKit/FBSDKCoreKi...l/AppEvents/SKAdNetworkFBSDKCoreKit/FBSDKCoreKi...l/AppEvents/SKAdNetwork | 71:90 (6%)313:332 (6%) | view | |
| 19 | x 2 | FBSDKCoreKit/FBSDKCoreKi...nal/AppEvents/IntegrityFBSDKCoreKit/FBSDKCoreKi...nal/AppEvents/Integrity | 62:80 (5%)269:287 (5%) | view | |
| 19 | x 2 | FBSDKCoreKit/FBSDKCoreKitTestsFBSDKCoreKit/FBSDKCoreKitTests | 168:186 (1%)190:208 (1%) | view | |
| 19 | x 2 | FBAEMKit/FBAEMKitTests/HelpersFBAEMKit/FBAEMKitTests/Helpers | 168:186 (10%)35:53 (12%) | view | |
| 19 | x 2 | FBSDKCoreKit/FBSDKCoreKi...nal/AppEvents/IntegrityFBSDKCoreKit/FBSDKCoreKi...nal/AppEvents/Integrity | 117:135 (5%)269:287 (5%) | view | |
| 19 | x 2 | FBSDKLoginKit/FBSDKLoginKitTestsFBSDKLoginKit/FBSDKLoginKitTests | 199:221 (2%)559:581 (2%) | view | |
| 19 | x 2 | FBSDKCoreKit/FBSDKCoreKitFBSDKCoreKit/FBSDKCoreKitTests/Interfaces | 83:101 (10%)30:48 (63%) | view | |
| 19 | x 2 | FBSDKLoginKit/FBSDKLoginKitTestsFBSDKLoginKit/FBSDKLoginKitTests | 290:312 (2%)559:581 (2%) | view | |
| 19 | x 2 | FBSDKCoreKit/FBSDKCoreKitTestsFBSDKCoreKit/FBSDKCoreKitTests | 121:140 (1%)148:167 (1%) | view | |
| 19 | x 2 | FBSDKLoginKit/FBSDKLoginKitTestsFBSDKLoginKit/FBSDKLoginKitTests | 199:221 (2%)290:312 (2%) | view | |
| 19 | x 2 | FBSDKCoreKit/FBSDKCoreKitTests/Internal/HelpersFBSDKCoreKit/FBSDKCoreKitTests/Internal/Helpers | 24:42 (14%)84:102 (14%) | view | |
| 18 | x 2 | FBSDKShareKit/FBSDKShareKitTests/UserInterfaceFBSDKShareKit/FBSDKShareKitTests/UserInterface | 86:111 (17%)85:110 (17%) | view | |
| 18 | x 2 | FBSDKLoginKit/FBSDKLoginKitTestsFBSDKLoginKit/FBSDKLoginKitTests | 713:731 (1%)834:852 (1%) | view | |
| 18 | x 2 | FBSDKCoreKit/FBSDKCoreKi...vents/Internal/CodelessFBSDKCoreKit/FBSDKCoreKi.../Internal/ViewHierarchy | 503:526 (5%)657:680 (4%) | view | |
| 18 | x 2 | FBAEMKit/FBAEMKitTestsFBAEMKit/FBAEMKitTests/Helpers | 168:185 (5%)36:53 (11%) | view | |
| 18 | x 2 | FBSDKCoreKitFBSDKCoreKit | 182:199 (5%)287:304 (5%) | view |
Duplicated Units
The list of top 5 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 10 | x 4 | FBSDKCoreKit/FBSDKCoreKitTests/InternalFBAEMKit/FBAEMKitTestsFBSDKGamingServicesKit/FBSDKGamingServicesKitTestsFBSDKShareKit/FBSDKShareKitTests/Internal | 39:50 39:50 39:50 39:50 | view | |
| 9 | x 2 | FBSDKCoreKit/FBSDKCoreKitTestsFBSDKShareKit/FBSDKShareKitTests/Bridging | 16:26 17:27 | view | |
| 7 | x 4 | FBSDKCoreKit/FBSDKCoreKitTests/InternalFBAEMKit/FBAEMKitTestsFBSDKGamingServicesKit/FBSDKGamingServicesKitTestsFBSDKShareKit/FBSDKShareKitTests/Internal | 61:69 61:69 61:69 61:69 | view | |
| 6 | x 4 | FBSDKCoreKit/FBSDKCoreKitTests/InternalFBAEMKit/FBAEMKitTestsFBSDKGamingServicesKit/FBSDKGamingServicesKitTestsFBSDKShareKit/FBSDKShareKitTests/Internal | 52:59 52:59 52:59 52:59 | view | |
| 6 | x 4 | FBSDKCoreKit/FBSDKCoreKitTests/InternalFBAEMKit/FBAEMKitTestsFBSDKGamingServicesKit/FBSDKGamingServicesKitTestsFBSDKShareKit/FBSDKShareKitTests/Internal | 71:78 71:78 71:78 71:78 | view |