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
- 12% duplication:
- 32,204 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 3,988 duplicated lines
- 185 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
facebook-common/src/main/res (73%)
--> facebook-login/src/main/res (92%)
2262
48 file pairs
details...
facebook-gamingservices/src/main/java (5%)
--> facebook-share/src/main/java (9%)
263
5 file pairs
details...
facebook-common/src/main/java (<1%)
--> facebook-core/src/main/java (<1%)
88
5 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| facebook-common/src/main/res (73%) --> facebook-login/src/main/res (92%) |
2262 | 48 file pairs | details... |
| facebook-gamingservices/src/main/java (5%) --> facebook-share/src/main/java (9%) |
263 | 5 file pairs | details... |
| facebook-common/src/main/java (<1%) --> facebook-core/src/main/java (<1%) |
88 | 5 file pairs | details... |
Longest Duplicates
The list of 50 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 66 | x 2 | facebook-gamingservices/...facebook/gamingservicesfacebook-gamingservices/...facebook/gamingservices | 153:249 (41%)160:256 (40%) | view | |
| 33 | x 2 | facebook-gamingservices/...facebook/gamingservicesfacebook-share/src/main/...m/facebook/share/widget | 315:361 (16%)222:268 (31%) | view | |
| 30 | x 2 | facebook-gamingservices/...facebook/gamingservicesfacebook-share/src/main/...m/facebook/share/widget | 110:212 (14%)80:182 (28%) | view | |
| 28 | x 2 | facebook-common/src/main/res/valuesfacebook-login/src/main/res/values | 1:47 (100%)1:47 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-vifacebook-login/src/main/res/values-vi | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-bnfacebook-login/src/main/res/values-bn | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-rofacebook-login/src/main/res/values-ro | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-hrfacebook-login/src/main/res/values-hr | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-fr-rCAfacebook-login/src/main/res/values-fr-rCA | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-fifacebook-login/src/main/res/values-fi | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-tafacebook-login/src/main/res/values-ta | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-zh-rTWfacebook-login/src/main/res/values-zh-rTW | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-esfacebook-login/src/main/res/values-es | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-jafacebook-login/src/main/res/values-ja | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-skfacebook-login/src/main/res/values-sk | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-infacebook-login/src/main/res/values-in | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-zh-rCNfacebook-login/src/main/res/values-zh-rCN | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-rufacebook-login/src/main/res/values-ru | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-tefacebook-login/src/main/res/values-te | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-trfacebook-login/src/main/res/values-tr | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-zh-rHKfacebook-login/src/main/res/values-zh-rHK | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-mlfacebook-login/src/main/res/values-ml | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-hifacebook-login/src/main/res/values-hi | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-es-rESfacebook-login/src/main/res/values-es-rES | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-elfacebook-login/src/main/res/values-el | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-thfacebook-login/src/main/res/values-th | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-kofacebook-login/src/main/res/values-ko | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-affacebook-login/src/main/res/values-af | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-itfacebook-login/src/main/res/values-it | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-pt-rPTfacebook-login/src/main/res/values-pt-rPT | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-frfacebook-login/src/main/res/values-fr | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-csfacebook-login/src/main/res/values-cs | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-ptfacebook-login/src/main/res/values-pt | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-mrfacebook-login/src/main/res/values-mr | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-nlfacebook-login/src/main/res/values-nl | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-iwfacebook-login/src/main/res/values-iw | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-plfacebook-login/src/main/res/values-pl | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-defacebook-login/src/main/res/values-de | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-knfacebook-login/src/main/res/values-kn | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-svfacebook-login/src/main/res/values-sv | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-msfacebook-login/src/main/res/values-ms | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-gamingservices/...facebook/gamingservicesfacebook-share/src/main/...m/facebook/share/widget | 214:246 (12%)183:215 (23%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-arfacebook-login/src/main/res/values-ar | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-gufacebook-login/src/main/res/values-gu | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-hufacebook-login/src/main/res/values-hu | 1:29 (100%)1:29 (100%) | view | |
| 25 | x 2 | facebook-common/src/main/res/values-pafacebook-login/src/main/res/values-pa | 1:29 (100%)1:29 (100%) | view | |
| 24 | x 2 | facebook-common/src/main/res/values-dafacebook-login/src/main/res/values-da | 1:28 (100%)1:28 (100%) | view | |
| 24 | x 2 | facebook-common/src/main/res/values-nbfacebook-login/src/main/res/values-nb | 1:28 (100%)1:28 (100%) | view | |
| 24 | x 2 | facebook-common/src/main/res/values-tlfacebook-login/src/main/res/values-tl | 1:28 (100%)1:28 (100%) | view | |
| 18 | x 2 | facebook-gamingservices/...facebook/gamingservicesfacebook-gamingservices/...facebook/gamingservices | 180:203 (12%)187:210 (10%) | view |
Duplicated Units
The list of top 6 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 42 | x 2 | facebook-gamingservices/...facebook/gamingservicesfacebook-gamingservices/...facebook/gamingservices | 154:198 161:205 | view | |
| 14 | x 2 | facebook-gamingservices/...facebook/gamingservicesfacebook-share/src/main/...m/facebook/share/widget | 325:345 232:252 | view | |
| 11 | x 3 | facebook-gamingservices/...facebook/gamingservicesfacebook-gamingservices/...facebook/gamingservicesfacebook-gamingservices/...facebook/gamingservices | 224:236 231:243 223:235 | view | |
| 10 | x 4 | facebook-gamingservices/...facebook/gamingservicesfacebook-gamingservices/...facebook/gamingservicesfacebook-gamingservices/...facebook/gamingservicesfacebook-gamingservices/...facebook/gamingservices | 271:283 367:379 278:290 249:261 | view | |
| 9 | x 2 | facebook-gamingservices/...facebook/gamingservicesfacebook-share/src/main/...m/facebook/share/widget | 74:84 63:73 | view | |
| 6 | x 2 | facebook-gamingservices/...facebook/gamingservicesfacebook-gamingservices/...facebook/gamingservices | 97:104 98:105 | view |