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
- 90% duplication:
- 1,151 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 1,040 duplicated lines
- 73 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
Dotnet Core/aws-iot-http-sigv4-dotnet-app/aws-iot-http-sigv4-dotnet-app/Signers (99%)
--> Dotnet/aws-iot-http-sigv4-dotnet-app/aws-iot-http-sigv4-dotnet-app/Signers (99%)
830
17 file pairs
details...
Dotnet Core/aws-iot-http-sigv4-dotnet-app/aws-iot-http-sigv4-dotnet-app/Utils (60%)
--> Dotnet/aws-iot-http-sigv4-dotnet-app/aws-iot-http-sigv4-dotnet-app/Utils (72%)
138
2 file pairs
details...
Dotnet Core/aws-iot-http-sigv4-dotnet-app/aws-iot-http-sigv4-dotnet-app (85%)
--> Dotnet/aws-iot-http-sigv4-dotnet-app/aws-iot-http-sigv4-dotnet-app (67%)
72
1 file pair
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| Dotnet Core/aws-iot-http-sigv4-dotnet-app/aws-iot-http-sigv4-dotnet-app/Signers (99%) --> Dotnet/aws-iot-http-sigv4-dotnet-app/aws-iot-http-sigv4-dotnet-app/Signers (99%) |
830 | 17 file pairs | details... |
| Dotnet Core/aws-iot-http-sigv4-dotnet-app/aws-iot-http-sigv4-dotnet-app/Utils (60%) --> Dotnet/aws-iot-http-sigv4-dotnet-app/aws-iot-http-sigv4-dotnet-app/Utils (72%) |
138 | 2 file pairs | details... |
| Dotnet Core/aws-iot-http-sigv4-dotnet-app/aws-iot-http-sigv4-dotnet-app (85%) --> Dotnet/aws-iot-http-sigv4-dotnet-app/aws-iot-http-sigv4-dotnet-app (67%) |
72 | 1 file pair | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 134 | x 2 | Dotnet Core/aws-iot...igv4-dotnet-app/SignersDotnet/aws-iot-http-sigv...igv4-dotnet-app/Signers |  AWS4SignerForChunkedUpload.csAWS4SignerForChunkedUpload.cs |
1:326 (100%)1:326 (100%) | view |
| 78 | x 2 | Dotnet Core/aws-iot...igv4-dotnet-app/SignersDotnet/aws-iot-http-sigv...igv4-dotnet-app/Signers | AWS4SignerBase.csAWS4SignerBase.cs |
13:228 (98%)13:228 (98%) | view |
| 73 | x 2 | Dotnet Core/aws-iot...igv4-dotnet-app/SignersDotnet/aws-iot-http-sigv...igv4-dotnet-app/Signers | AWS4SignerForQueryParameterAuth.csAWS4SignerForQueryParameterAuth.cs |
1:160 (100%)1:160 (100%) | view |
| 68 | x 2 | Dotnet Core/aws-iot...igv4-dotnet-app/SignersDotnet/aws-iot-http-sigv...igv4-dotnet-app/Signers | AWS4SignerForPOST.csAWS4SignerForPOST.cs |
1:150 (100%)1:150 (100%) | view |
| 62 | x 2 | Dotnet Core/aws-iot...igv4-dotnet-app/SignersDotnet/aws-iot-http-sigv...igv4-dotnet-app/Signers | AWS4SignerForAuthorizationHeader.csAWS4SignerForAuthorizationHeader.cs |
1:135 (100%)1:135 (100%) | view |
| 61 | x 2 | Dotnet Core/aws-iot...-sigv4-dotnet-app/UtilsDotnet/aws-iot-http-sigv...-sigv4-dotnet-app/Utils | HttpHelpers.csHttpHelper.cs |
1:164 (100%)1:163 (100%) | view |
| 60 | x 2 | Dotnet Core/aws-iot...igv4-dotnet-app/SignersDotnet/aws-iot-http-sigv...igv4-dotnet-app/Signers | AWS4SignerForPOST.csAWS4SignerForAuthorizationHeader.cs |
57:150 (88%)42:135 (96%) | view |
| 60 | x 2 | Dotnet/aws-iot-http-sigv...igv4-dotnet-app/SignersDotnet/aws-iot-http-sigv...igv4-dotnet-app/Signers | AWS4SignerForAuthorizationHeader.csAWS4SignerForPOST.cs |
42:135 (96%)57:150 (88%) | view |
| 60 | x 2 | Dotnet Core/aws-iot...igv4-dotnet-app/SignersDotnet/aws-iot-http-sigv...igv4-dotnet-app/Signers | AWS4SignerForAuthorizationHeader.csAWS4SignerForPOST.cs |
42:135 (96%)57:150 (88%) | view |
| 60 | x 2 | Dotnet Core/aws-iot...igv4-dotnet-app/SignersDotnet Core/aws-iot...igv4-dotnet-app/Signers | AWS4SignerForAuthorizationHeader.csAWS4SignerForPOST.cs |
42:135 (96%)57:150 (88%) | view |
| 31 | x 2 | Dotnet/aws-iot-http-sigv...igv4-dotnet-app/SignersDotnet/aws-iot-http-sigv...igv4-dotnet-app/Signers | AWS4SignerForChunkedUpload.csAWS4SignerForPOST.cs |
91:140 (23%)71:120 (45%) | view |
| 31 | x 2 | Dotnet Core/aws-iot...igv4-dotnet-app/SignersDotnet Core/aws-iot...igv4-dotnet-app/Signers | AWS4SignerForChunkedUpload.csAWS4SignerForPOST.cs |
91:140 (23%)71:120 (45%) | view |
| 31 | x 2 | Dotnet Core/aws-iot...igv4-dotnet-app/SignersDotnet/aws-iot-http-sigv...igv4-dotnet-app/Signers | AWS4SignerForChunkedUpload.csAWS4SignerForPOST.cs |
91:140 (23%)71:120 (45%) | view |
| 31 | x 2 | Dotnet Core/aws-iot...igv4-dotnet-app/SignersDotnet/aws-iot-http-sigv...igv4-dotnet-app/Signers | AWS4SignerForAuthorizationHeader.csAWS4SignerForChunkedUpload.cs |
56:105 (50%)91:140 (23%) | view |
| 31 | x 2 | Dotnet Core/aws-iot...igv4-dotnet-app/SignersDotnet/aws-iot-http-sigv...igv4-dotnet-app/Signers | AWS4SignerForPOST.csAWS4SignerForChunkedUpload.cs |
71:120 (45%)91:140 (23%) | view |
| 31 | x 2 | Dotnet Core/aws-iot...igv4-dotnet-app/SignersDotnet/aws-iot-http-sigv...igv4-dotnet-app/Signers | AWS4SignerForChunkedUpload.csAWS4SignerForAuthorizationHeader.cs |
91:140 (23%)56:105 (50%) | view |
| 31 | x 2 | Dotnet Core/aws-iot...igv4-dotnet-app/SignersDotnet Core/aws-iot...igv4-dotnet-app/Signers | AWS4SignerForAuthorizationHeader.csAWS4SignerForChunkedUpload.cs |
56:105 (50%)91:140 (23%) | view |
| 31 | x 2 | Dotnet/aws-iot-http-sigv...igv4-dotnet-app/SignersDotnet/aws-iot-http-sigv...igv4-dotnet-app/Signers | AWS4SignerForAuthorizationHeader.csAWS4SignerForChunkedUpload.cs |
56:105 (50%)91:140 (23%) | view |
| 23 | x 2 | Dotnet Core/aws-iot...t-http-sigv4-dotnet-appDotnet/aws-iot-http-sigv...t-http-sigv4-dotnet-app | Program.csProgram.cs |
35:70 (62%)35:69 (62%) | view |
| 13 | x 2 | Dotnet Core/aws-iot...t-http-sigv4-dotnet-appDotnet/aws-iot-http-sigv...t-http-sigv4-dotnet-app | Program.csProgram.cs |
1:32 (35%)1:32 (35%) | view |
Duplicated Units
The list of top 17 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 81 | x 2 | Dotnet/aws-iot-http-sigv...igv4-dotnet-app/SignersDotnet Core/aws-iot...igv4-dotnet-app/Signers | AWS4SignerForQueryParameterAuth.csAWS4SignerForQueryParameterAuth.cs |
41:161 41:161 | view |
| 67 | x 2 | Dotnet/aws-iot-http-sigv...igv4-dotnet-app/SignersDotnet Core/aws-iot...igv4-dotnet-app/Signers | AWS4SignerForChunkedUpload.csAWS4SignerForChunkedUpload.cs |
77:176 77:176 | view |
| 65 | x 4 | Dotnet/aws-iot-http-sigv...igv4-dotnet-app/SignersDotnet/aws-iot-http-sigv...igv4-dotnet-app/SignersDotnet Core/aws-iot...igv4-dotnet-app/SignersDotnet Core/aws-iot...igv4-dotnet-app/Signers | AWS4SignerForPOST.csAWS4SignerForAuthorizationHeader.csAWS4SignerForPOST.csAWS4SignerForAuthorizationHeader.cs |
57:151 42:136 57:151 42:136 | view |
| 34 | x 2 | Dotnet/aws-iot-http-sigv...-sigv4-dotnet-app/UtilsDotnet Core/aws-iot...-sigv4-dotnet-app/Utils | HttpHelper.csHttpHelpers.cs |
21:57 21:57 | view |
| 24 | x 2 | Dotnet/aws-iot-http-sigv...t-http-sigv4-dotnet-appDotnet Core/aws-iot...t-http-sigv4-dotnet-app | Program.csProgram.cs |
40:70 40:71 | view |
| 18 | x 2 | Dotnet/aws-iot-http-sigv...-sigv4-dotnet-app/UtilsDotnet Core/aws-iot...-sigv4-dotnet-app/Utils | HttpHelper.csHttpHelpers.cs |
67:88 67:88 | view |
| 18 | x 2 | Dotnet/aws-iot-http-sigv...-sigv4-dotnet-app/UtilsDotnet Core/aws-iot...-sigv4-dotnet-app/Utils | HttpHelper.csHttpHelpers.cs |
90:110 90:110 | view |
| 17 | x 2 | Dotnet/aws-iot-http-sigv...t-http-sigv4-dotnet-appDotnet Core/aws-iot...t-http-sigv4-dotnet-app | Program.csProgram.cs |
12:30 12:30 | view |
| 16 | x 2 | Dotnet/aws-iot-http-sigv...-sigv4-dotnet-app/UtilsDotnet Core/aws-iot...-sigv4-dotnet-app/Utils | HttpHelper.csHttpHelpers.cs |
119:138 119:138 | view |
| 16 | x 2 | Dotnet/aws-iot-http-sigv...igv4-dotnet-app/SignersDotnet Core/aws-iot...igv4-dotnet-app/Signers | AWS4SignerBase.csAWS4SignerBase.cs |
99:124 99:124 | view |
| 15 | x 2 | Dotnet/aws-iot-http-sigv...igv4-dotnet-app/SignersDotnet Core/aws-iot...igv4-dotnet-app/Signers | AWS4SignerBase.csAWS4SignerBase.cs |
143:162 143:162 | view |
| 13 | x 2 | Dotnet/aws-iot-http-sigv...-sigv4-dotnet-app/UtilsDotnet Core/aws-iot...-sigv4-dotnet-app/Utils | HttpHelper.csHttpHelpers.cs |
147:164 148:165 | view |
| 13 | x 2 | Dotnet/aws-iot-http-sigv...igv4-dotnet-app/SignersDotnet Core/aws-iot...igv4-dotnet-app/Signers | AWS4SignerForChunkedUpload.csAWS4SignerForChunkedUpload.cs |
192:208 192:208 | view |
| 12 | x 2 | Dotnet/aws-iot-http-sigv...igv4-dotnet-app/SignersDotnet Core/aws-iot...igv4-dotnet-app/Signers | AWS4SignerBase.csAWS4SignerBase.cs |
78:91 78:91 | view |
| 8 | x 2 | Dotnet/aws-iot-http-sigv...-sigv4-dotnet-app/UtilsDotnet Core/aws-iot...-sigv4-dotnet-app/Utils | JsonHelper.csJsonHelper.cs |
8:19 8:19 | view |
| 8 | x 2 | Dotnet/aws-iot-http-sigv...igv4-dotnet-app/SignersDotnet Core/aws-iot...igv4-dotnet-app/Signers | AWS4SignerBase.csAWS4SignerBase.cs |
221:229 221:229 | view |
| 8 | x 2 | Dotnet/aws-iot-http-sigv...igv4-dotnet-app/SignersDotnet Core/aws-iot...igv4-dotnet-app/Signers | AWS4SignerForChunkedUpload.csAWS4SignerForChunkedUpload.cs |
222:230 222:230 | view |