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
- 70% duplication:
- 10,330 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 7,235 duplicated lines
- 552 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
DEV - Building your Applications for the Cloud/DEV10 (70%)
--> MIG - Migrating Applications to the Cloud/MIG40 (92%)
3168
59 file pairs
details...
DEV - Building your Applications for the Cloud/DEV10 (65%)
--> MIG - Migrating Applications to the Cloud/MIG50 (79%)
2949
56 file pairs
details...
MIG - Migrating Applications to the Cloud/MIG40 (85%)
--> MIG - Migrating Applications to the Cloud/MIG50 (79%)
2937
52 file pairs
details...
DEV - Building your Applications for the Cloud/DEV10 (50%)
--> SRE - Operating applications and infrastructure in the cloud/SRE40 (90%)
2261
48 file pairs
details...
MIG - Migrating Applications to the Cloud/MIG50 (60%)
--> SRE - Operating applications and infrastructure in the cloud/SRE40 (90%)
2250
44 file pairs
details...
MIG - Migrating Applications to the Cloud/MIG40 (65%)
--> SRE - Operating applications and infrastructure in the cloud/SRE40 (90%)
2245
44 file pairs
details...
DEV - Building your Applications for the Cloud/DEV20 (96%)
--> SRE - Operating applications and infrastructure in the cloud/SRE40 (36%)
914
7 file pairs
details...
DEV - Building your Applications for the Cloud/DEV10 (18%)
--> DEV - Building your Applications for the Cloud/DEV20 (87%)
833
6 file pairs
details...
DEV - Building your Applications for the Cloud/DEV20 (87%)
--> MIG - Migrating Applications to the Cloud/MIG50 (22%)
833
6 file pairs
details...
DEV - Building your Applications for the Cloud/DEV20 (87%)
--> MIG - Migrating Applications to the Cloud/MIG40 (24%)
833
6 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| DEV - Building your Applications for the Cloud/DEV10 (70%) --> MIG - Migrating Applications to the Cloud/MIG40 (92%) |
3168 | 59 file pairs | details... |
| DEV - Building your Applications for the Cloud/DEV10 (65%) --> MIG - Migrating Applications to the Cloud/MIG50 (79%) |
2949 | 56 file pairs | details... |
| MIG - Migrating Applications to the Cloud/MIG40 (85%) --> MIG - Migrating Applications to the Cloud/MIG50 (79%) |
2937 | 52 file pairs | details... |
| DEV - Building your Applications for the Cloud/DEV10 (50%) --> SRE - Operating applications and infrastructure in the cloud/SRE40 (90%) |
2261 | 48 file pairs | details... |
| MIG - Migrating Applications to the Cloud/MIG50 (60%) --> SRE - Operating applications and infrastructure in the cloud/SRE40 (90%) |
2250 | 44 file pairs | details... |
| MIG - Migrating Applications to the Cloud/MIG40 (65%) --> SRE - Operating applications and infrastructure in the cloud/SRE40 (90%) |
2245 | 44 file pairs | details... |
| DEV - Building your Applications for the Cloud/DEV20 (96%) --> SRE - Operating applications and infrastructure in the cloud/SRE40 (36%) |
914 | 7 file pairs | details... |
| DEV - Building your Applications for the Cloud/DEV10 (18%) --> DEV - Building your Applications for the Cloud/DEV20 (87%) |
833 | 6 file pairs | details... |
| DEV - Building your Applications for the Cloud/DEV20 (87%) --> MIG - Migrating Applications to the Cloud/MIG50 (22%) |
833 | 6 file pairs | details... |
| DEV - Building your Applications for the Cloud/DEV20 (87%) --> MIG - Migrating Applications to the Cloud/MIG40 (24%) |
833 | 6 file pairs | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 217 | x 2 | DEV - Building.../DEV10/src/frontend/srcMIG - Migratin.../MIG50/src/frontend/src |  style.cssstyle.css |
1:257 (100%)1:257 (100%) | view |
| 217 | x 2 | DEV - Building.../DEV10/src/frontend/srcMIG - Migratin.../MIG40/src/frontend/src | style.cssstyle.css |
1:257 (100%)1:257 (100%) | view |
| 217 | x 2 | MIG - Migratin.../MIG40/src/frontend/srcMIG - Migratin.../MIG50/src/frontend/src | style.cssstyle.css |
1:257 (100%)1:257 (100%) | view |
| 170 | x 2 | DEV - Building...he Cloud/DEV20/srcSRE - Operatin.../setup/src/frontend/src | style.cssstyle.css |
1:205 (100%)1:203 (100%) | view |
| 142 | x 2 | MIG - Migratin.../MIG40/src/frontend/srcMIG - Migratin.../MIG50/src/frontend/src |  ProductTable.jsProductTable.js |
6:169 (100%)6:169 (100%) | view |
| 142 | x 2 | DEV - Building.../DEV10/src/frontend/srcMIG - Migratin.../MIG40/src/frontend/src | ProductTable.jsProductTable.js |
6:169 (100%)6:169 (100%) | view |
| 142 | x 2 | DEV - Building.../DEV10/src/frontend/srcMIG - Migratin.../MIG50/src/frontend/src | ProductTable.jsProductTable.js |
6:169 (100%)6:169 (100%) | view |
| 128 | x 2 | MIG - Migratin.../MIG40/src/frontend/srcSRE - Operatin.../setup/src/frontend/src | ProductDetails.jsProductDetails.js |
3:141 (100%)3:141 (100%) | view |
| 128 | x 2 | MIG - Migratin.../MIG40/src/frontend/srcMIG - Migratin.../MIG50/src/frontend/src | ProductDetails.jsProductDetails.js |
3:141 (100%)3:141 (100%) | view |
| 128 | x 2 | DEV - Building.../DEV10/src/frontend/srcDEV - Building...he Cloud/DEV20/src | ProductDetails.jsProductDetails.js |
3:141 (100%)3:141 (100%) | view |
| 128 | x 2 | DEV - Building...he Cloud/DEV20/srcSRE - Operatin.../setup/src/frontend/src | ProductDetails.jsProductDetails.js |
3:141 (100%)3:141 (100%) | view |
| 128 | x 2 | DEV - Building.../DEV10/src/frontend/srcMIG - Migratin.../MIG50/src/frontend/src | ProductDetails.jsProductDetails.js |
3:141 (100%)3:141 (100%) | view |
| 128 | x 2 | DEV - Building...he Cloud/DEV20/srcMIG - Migratin.../MIG50/src/frontend/src | ProductDetails.jsProductDetails.js |
3:141 (100%)3:141 (100%) | view |
| 128 | x 2 | DEV - Building...he Cloud/DEV20/srcMIG - Migratin.../MIG40/src/frontend/src | ProductDetails.jsProductDetails.js |
3:141 (100%)3:141 (100%) | view |
| 128 | x 2 | DEV - Building.../DEV10/src/frontend/srcSRE - Operatin.../setup/src/frontend/src | ProductDetails.jsProductDetails.js |
3:141 (100%)3:141 (100%) | view |
| 128 | x 2 | DEV - Building.../DEV10/src/frontend/srcMIG - Migratin.../MIG40/src/frontend/src | ProductDetails.jsProductDetails.js |
3:141 (100%)3:141 (100%) | view |
| 128 | x 2 | MIG - Migratin.../MIG50/src/frontend/srcSRE - Operatin.../setup/src/frontend/src | ProductDetails.jsProductDetails.js |
3:141 (100%)3:141 (100%) | view |
| 124 | x 2 | MIG - Migratin.../MIG40/src/frontend/srcSRE - Operatin.../setup/src/frontend/src | style.cssstyle.css |
68:216 (57%)55:203 (72%) | view |
| 124 | x 2 | MIG - Migratin.../MIG50/src/frontend/srcSRE - Operatin.../setup/src/frontend/src | style.cssstyle.css |
68:216 (57%)55:203 (72%) | view |
| 124 | x 2 | DEV - Building...he Cloud/DEV20/srcMIG - Migratin.../MIG40/src/frontend/src | style.cssstyle.css |
57:205 (72%)68:216 (57%) | view |
Duplicated Units
The list of top 20 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 56 | x 5 | DEV - Building.../DEV10/src/frontend/srcDEV - Building...he Cloud/DEV20/srcMIG - Migratin.../MIG40/src/frontend/srcMIG - Migratin.../MIG50/src/frontend/srcSRE - Operatin.../setup/src/frontend/src | ProductDetails.jsProductDetails.jsProductDetails.jsProductDetails.jsProductDetails.js |
38:138 38:138 38:138 38:138 38:138 | view |
| 38 | x 2 | DEV - Building...he Cloud/DEV20/srcSRE - Operatin.../setup/src/frontend/src | ProductTable.jsProductTable.js |
99:159 101:161 | view |
| 42 | x 3 | DEV - Building...ce/InventoryService.ApiMIG - Migratin...ce/InventoryService.ApiMIG - Migratin...ce/InventoryService.Api |  Startup.csStartup.csStartup.cs |
32:76 32:76 32:76 | view |
| 60 | x 3 | DEV - Building...src/product-service/srcMIG - Migratin...src/product-service/srcMIG - Migratin...src/product-service/src | index.jsindex.jsindex.js |
59:128 59:128 66:135 | view |
| 35 | x 2 | MIG - Migratin...ce/InventoryService.ApiMIG - Migratin...ce/InventoryService.Api | Program.csProgram.cs |
17:55 17:55 | view |
| 34 | x 2 | DEV - Building...yService.Api/MigrationsDEV - Building...yService.Api/Migrations | 20181127231359_AddPayroll.Designer.csInventoryContextModelSnapshot.cs |
16:64 14:62 | view |
| 32 | x 3 | DEV - Building.../DEV10/src/frontend/srcMIG - Migratin.../MIG40/src/frontend/srcMIG - Migratin.../MIG50/src/frontend/src | ProductTable.jsProductTable.jsProductTable.js |
56:90 56:90 56:90 | view |
| 44 | x 3 | DEV - Building...src/product-service/srcMIG - Migratin...src/product-service/srcMIG - Migratin...src/product-service/src | hapi-azure-key-vault.jshapi-azure-key-vault.jshapi-azure-key-vault.js |
16:76 16:76 16:76 | view |
| 27 | x 3 | DEV - Building...ce/InventoryService.ApiMIG - Migratin...ce/InventoryService.ApiMIG - Migratin...ce/InventoryService.Api | Startup.csStartup.csStartup.cs |
78:108 78:108 78:108 | view |
| 25 | x 7 | DEV - Building...yService.Api/MigrationsMIG - Migratin...yService.Api/MigrationsMIG - Migratin...yService.Api/MigrationsMIG - Migratin...yService.Api/MigrationsMIG - Migratin...yService.Api/MigrationsSRE - Operatin...yService.Api/MigrationsSRE - Operatin...yService.Api/Migrations | 20181102180834_AddModifiedColumn.Desi...20181102180834_AddModifiedColumn.Desi...InventoryContextModelSnapshot.cs20181102180834_AddModifiedColumn.Desi...InventoryContextModelSnapshot.cs20181102180834_AddModifiedColumn.Desi...InventoryContextModelSnapshot.cs |
16:50 16:50 14:48 16:50 14:48 16:50 14:48 | view |
| 24 | x 4 | DEV - Building...yService.Api/MigrationsMIG - Migratin...yService.Api/MigrationsMIG - Migratin...yService.Api/MigrationsSRE - Operatin...yService.Api/Migrations | 20181101063039_AddSecretUsers.Designe...20181101063039_AddSecretUsers.Designe...20181101063039_AddSecretUsers.Designe...20181101063039_AddSecretUsers.Designe... |
15:47 15:47 15:47 15:47 | view |
| 24 | x 2 | DEV - Building...erServerless/DataAccessDEV - Building...rServerless/_DataAccess | InventoryInitializer.csInventoryInitializer.cs |
73:97 73:97 | view |
| 22 | x 3 | DEV - Building.../DEV10/src/frontend/srcMIG - Migratin.../MIG40/src/frontend/srcMIG - Migratin.../MIG50/src/frontend/src | ProductTable.jsProductTable.jsProductTable.js |
29:55 29:55 29:55 | view |
| 20 | x 3 | DEV - Building...oryService.Api/ServicesMIG - Migratin...oryService.Api/ServicesMIG - Migratin...oryService.Api/Services | SqlInventoryData.csSqlInventoryData.csSqlInventoryData.cs |
46:66 46:66 46:66 | view |
| 19 | x 3 | MIG - Migratin...oryService.Api/ServicesMIG - Migratin...oryService.Api/ServicesSRE - Operatin...oryService.Api/Services | BadSqlInventoryData.csBadSqlInventoryData.csBadSqlInventoryData.cs |
16:42 16:42 16:42 | view |
| 17 | x 5 | DEV - Building.../DEV10/src/frontend/srcDEV - Building...he Cloud/DEV20/srcMIG - Migratin.../MIG40/src/frontend/srcMIG - Migratin.../MIG50/src/frontend/srcSRE - Operatin.../setup/src/frontend/src | ProductDetails.jsProductDetails.jsProductDetails.jsProductDetails.jsProductDetails.js |
20:37 20:37 20:37 20:37 20:37 | view |
| 17 | x 2 | DEV - Building...rc/reports/CreateReportMIG - Migratin...rc/reports/CreateReport | index.jsindex.js |
39:60 33:54 | view |
| 17 | x 2 | DEV - Building...he Cloud/DEV20/srcSRE - Operatin.../setup/src/frontend/src | ProductTable.jsProductTable.js |
29:50 29:50 | view |
| 16 | x 5 | DEV - Building.../DEV10/src/frontend/srcDEV - Building...he Cloud/DEV20/srcMIG - Migratin.../MIG40/src/frontend/srcMIG - Migratin.../MIG50/src/frontend/srcSRE - Operatin.../setup/src/frontend/src | ProductTable.jsProductTable.jsProductTable.jsProductTable.jsProductTable.js |
7:25 7:25 7:25 7:25 7:25 | view |
| 16 | x 4 | DEV - Building...yService.Api/MigrationsMIG - Migratin...yService.Api/MigrationsMIG - Migratin...yService.Api/MigrationsSRE - Operatin...yService.Api/Migrations | 20181023230148_InitialCreate.Designer.cs20181023230148_InitialCreate.Designer.cs20181023230148_InitialCreate.Designer.cs20181023230148_InitialCreate.Designer.cs |
15:35 15:35 15:35 15:35 | view |