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
- 97% duplication:
- 8,761 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 8,514 duplicated lines
- 83 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
comment-spam/codelab1 (147%)
--> comment-spam/codelab2 (75%)
6711
10 file pairs
details...
product-search/codelab1 (103%)
--> product-search/codelab2 (48%)
734
8 file pairs
details...
audio_classification/codelab1 (100%)
--> audio_classification/codelab2 (67%)
88
4 file pairs
details...
ImageClassificationMobile/ios (48%)
--> TextClassificationOnMobile/iOS (16%)
80
12 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| comment-spam/codelab1 (147%) --> comment-spam/codelab2 (75%) |
6711 | 10 file pairs | details... |
| product-search/codelab1 (103%) --> product-search/codelab2 (48%) |
734 | 8 file pairs | details... |
| audio_classification/codelab1 (100%) --> audio_classification/codelab2 (67%) |
88 | 4 file pairs | details... |
| ImageClassificationMobile/ios (48%) --> TextClassificationOnMobile/iOS (16%) |
80 | 12 file pairs | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 2004 | x 2 | comment-spam/codelab2/web/final/wwwcomment-spam/codelab2/web/starter/www |  dictionary.jsdictionary.js |
15:2018 (100%)15:2018 (100%) | view |
| 2004 | x 2 | comment-spam/codelab1/web/final/wwwcomment-spam/codelab2/web/final/www | dictionary.jsdictionary.js |
15:2018 (100%)15:2018 (100%) | view |
| 2004 | x 2 | comment-spam/codelab1/web/final/wwwcomment-spam/codelab2/web/starter/www | dictionary.jsdictionary.js |
15:2018 (100%)15:2018 (100%) | view |
| 109 | x 2 | comment-spam/codelab2/web/final/wwwcomment-spam/codelab2/web/starter/www |  style.cssstyle.css |
5:156 (100%)5:156 (100%) | view |
| 109 | x 2 | comment-spam/codelab1/web/final/wwwcomment-spam/codelab2/web/final/www | style.cssstyle.css |
5:156 (100%)5:156 (100%) | view |
| 109 | x 2 | comment-spam/codelab1/web/final/wwwcomment-spam/codelab2/web/starter/www | style.cssstyle.css |
5:156 (100%)5:156 (100%) | view |
| 99 | x 2 | object-detection/codelab...odelabs/objectdetectionobject-detection/codelab...odelabs/objectdetection |  MainActivity.ktMainActivity.kt |
175:357 (57%)123:305 (68%) | view |
| 76 | x 2 | comment-spam/codelab1/web/final/wwwcomment-spam/codelab2/web/starter/www | script.jsscript.js |
18:197 (100%)18:197 (100%) | view |
| 76 | x 2 | product-search/codelab2/...labs/productimagesearchproduct-search/codelab2/...labs/productimagesearch | ObjectDetectorActivity.ktObjectDetectorActivity.kt |
131:286 (57%)99:254 (67%) | view |
| 76 | x 2 | comment-spam/codelab1/web/final/wwwcomment-spam/codelab2/web/final/www | script.jsscript.js |
18:197 (100%)18:197 (100%) | view |
| 76 | x 2 | comment-spam/codelab2/web/final/wwwcomment-spam/codelab2/web/starter/www | script.jsscript.js |
18:197 (100%)18:197 (100%) | view |
| 75 | x 2 | product-search/codelab2/...labs/productimagesearchproduct-search/codelab2/...labs/productimagesearch | ImageClickableView.ktImageClickableView.kt |
17:171 (100%)17:171 (100%) | view |
| 75 | x 2 | product-search/codelab1/...labs/productimagesearchproduct-search/codelab2/...labs/productimagesearch | ImageClickableView.ktImageClickableView.kt |
17:171 (100%)17:171 (100%) | view |
| 75 | x 2 | product-search/codelab1/...labs/productimagesearchproduct-search/codelab2/...labs/productimagesearch | ImageClickableView.ktImageClickableView.kt |
17:171 (100%)17:171 (100%) | view |
| 75 | x 2 | product-search/codelab1/...labs/productimagesearchproduct-search/codelab2/...labs/productimagesearch | ImageClickableView.ktImageClickableView.kt |
17:171 (100%)17:171 (100%) | view |
| 75 | x 2 | product-search/codelab1/...labs/productimagesearchproduct-search/codelab2/...labs/productimagesearch | ImageClickableView.ktImageClickableView.kt |
17:171 (100%)17:171 (100%) | view |
| 75 | x 2 | product-search/codelab1/...labs/productimagesearchproduct-search/codelab1/...labs/productimagesearch | ImageClickableView.ktImageClickableView.kt |
17:171 (100%)17:171 (100%) | view |
| 71 | x 2 | TextClassificationOnMobi...TextClassificationStep2TextClassificationOnMobi...TextClassificationStep3 |  ViewController.swiftViewController.swift |
25:144 (78%)25:144 (78%) | view |
| 61 | x 2 | product-search/codelab1/...labs/productimagesearchproduct-search/codelab2/...labs/productimagesearch | ObjectDetectorActivity.ktObjectDetectorActivity.kt |
143:266 (52%)131:254 (53%) | view |
| 61 | x 2 | product-search/codelab1/...labs/productimagesearchproduct-search/codelab2/...labs/productimagesearch | ObjectDetectorActivity.ktObjectDetectorActivity.kt |
143:266 (52%)163:286 (46%) | view |
Duplicated Units
The list of top 20 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 25 | x 4 | product-search/codelab2/...labs/productimagesearchproduct-search/codelab2/...labs/productimagesearchproduct-search/codelab1/...labs/productimagesearchproduct-search/codelab1/...labs/productimagesearch | ImageClickableView.ktImageClickableView.ktImageClickableView.ktImageClickableView.kt |
64:98 64:98 64:98 64:98 | view |
| 19 | x 4 | product-search/codelab2/...labs/productimagesearchproduct-search/codelab2/...labs/productimagesearchproduct-search/codelab1/...labs/productimagesearchproduct-search/codelab1/...labs/productimagesearch | ImageClickableView.ktImageClickableView.ktImageClickableView.ktImageClickableView.kt |
110:130 110:130 110:130 110:130 | view |
| 19 | x 2 | object-detection/codelab...odelabs/objectdetectionobject-detection/codelab...odelabs/objectdetection | MainActivity.ktMainActivity.kt |
93:112 90:109 | view |
| 18 | x 2 | TextClassificationOnMobi...textclassificationstep3TextClassificationOnMobi...textclassificationstep2 | MainActivity.ktMainActivity.kt |
29:49 29:49 | view |
| 18 | x 2 | product-search/codelab2/...labs/productimagesearchproduct-search/codelab2/...labs/productimagesearch | ProductSearchActivity.ktProductSearchActivity.kt |
133:163 128:158 | view |
| 17 | x 2 | TextClassificationOnMobi...TextClassificationStep3TextClassificationOnMobi...TextClassificationStep2 | ViewController.swiftViewController.swift |
49:70 49:70 | view |
| 17 | x 2 | TextClassificationOnMobi...TextClassificationStep3TextClassificationOnMobi...TextClassificationStep2 | ViewController.swiftViewController.swift |
80:107 80:107 | view |
| 17 | x 3 | comment-spam/codelab2/web/final/wwwcomment-spam/codelab2/web/starter/wwwcomment-spam/codelab1/web/final/www | script.jsscript.jsscript.js |
87:111 87:111 87:111 | view |
| 17 | x 3 | comment-spam/codelab2/web/final/wwwcomment-spam/codelab2/web/starter/wwwcomment-spam/codelab1/web/final/www | script.jsscript.jsscript.js |
138:166 138:166 138:166 | view |
| 14 | x 3 | comment-spam/codelab2/web/final/wwwcomment-spam/codelab2/web/starter/wwwcomment-spam/codelab1/web/final/www | script.jsscript.jsscript.js |
173:192 173:192 173:192 | view |
| 13 | x 2 | object-detection/codelab...odelabs/objectdetectionobject-detection/codelab...odelabs/objectdetection | MainActivity.ktMainActivity.kt |
63:78 60:75 | view |
| 12 | x 2 | TextClassificationOnMobi...TextClassificationStep3TextClassificationOnMobi...TextClassificationStep2 | ViewController.swiftViewController.swift |
177:189 177:189 | view |
| 12 | x 4 | product-search/codelab2/...labs/productimagesearchproduct-search/codelab2/...labs/productimagesearchproduct-search/codelab1/...labs/productimagesearchproduct-search/codelab1/...labs/productimagesearch | ObjectDetectorActivity.ktObjectDetectorActivity.ktObjectDetectorActivity.ktObjectDetectorActivity.kt |
65:78 65:78 65:78 60:73 | view |
| 12 | x 3 | comment-spam/codelab2/web/final/wwwcomment-spam/codelab2/web/starter/wwwcomment-spam/codelab1/web/final/www | script.jsscript.jsscript.js |
26:50 26:50 26:50 | view |
| 14 | x 2 | product-search/codelab2/...labs/productimagesearchproduct-search/codelab2/...labs/productimagesearch | ProductSearchActivity.ktProductSearchActivity.kt |
138:163 133:158 | view |
| 10 | x 2 | ImageClassificationMobil...p1/ImageClassifierStep1ImageClassificationMobil...p2/ImageClassifierStep2 | ViewController.swiftViewController.swift |
60:74 65:79 | view |
| 9 | x 2 | product-search/codelab2/...labs/productimagesearchproduct-search/codelab2/...labs/productimagesearch | ProductSearchActivity.ktProductSearchActivity.kt |
51:64 51:64 | view |
| 26 | x 3 | comment-spam/codelab2/web/final/wwwcomment-spam/codelab2/web/starter/wwwcomment-spam/codelab1/web/final/www | script.jsscript.jsscript.js |
68:113 68:113 68:113 | view |
| 7 | x 2 | product-search/codelab2/...labs/productimagesearchproduct-search/codelab2/...labs/productimagesearch | ProductSearchActivity.ktProductSearchActivity.kt |
163:171 158:166 | view |
| 7 | x 2 | object-detection/codelab...odelabs/objectdetectionobject-detection/codelab...odelabs/objectdetection | MainActivity.ktMainActivity.kt |
80:87 77:84 | view |