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
- 65% duplication:
- 10,120 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 6,641 duplicated lines
- 244 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
Blog-AppTransition (79%)
--> Blog-WpfNetCore (37%)
1297
30 file pairs
details...
Blog-AdvancedInstaller (114%)
--> Blog-OptionalPackages (31%)
545
18 file pairs
details...
Blog-OptionalPackages (26%)
--> Blog-Scripting (108%)
465
18 file pairs
details...
Blog-AdvancedInstaller (64%)
--> Blog-Scripting (72%)
310
9 file pairs
details...
Blog-PSF (6%)
--> Blog-WinRTComponent (9%)
57
3 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| Blog-AppTransition (79%) --> Blog-WpfNetCore (37%) |
1297 | 30 file pairs | details... |
| Blog-AdvancedInstaller (114%) --> Blog-OptionalPackages (31%) |
545 | 18 file pairs | details... |
| Blog-OptionalPackages (26%) --> Blog-Scripting (108%) |
465 | 18 file pairs | details... |
| Blog-AdvancedInstaller (64%) --> Blog-Scripting (72%) |
310 | 9 file pairs | details... |
| Blog-PSF (6%) --> Blog-WinRTComponent (9%) |
57 | 3 file pairs | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 628 | x 2 | UWPAPIsUsedFromUnityEXEA..._Data/Mono/etc/mono/1.0UWPAPIsUsedFromUnityEXEA..._Data/Mono/etc/mono/2.0 | aspx DefaultWsdlHelpGenerator.aspxDefaultWsdlHelpGenerator.aspx |
400:1154 (42%)378:1132 (40%) | view |
| 317 | x 2 | UWPAPIsUsedFromUnityEXEA..._Data/Mono/etc/mono/1.0UWPAPIsUsedFromUnityEXEA..._Data/Mono/etc/mono/2.0 | aspx DefaultWsdlHelpGenerator.aspxDefaultWsdlHelpGenerator.aspx |
1167:1538 (21%)1156:1527 (20%) | view |
| 175 | x 2 | UWPAPIsUsedFromUnityEXEA..._Data/Mono/etc/mono/1.0UWPAPIsUsedFromUnityEXEA..._Data/Mono/etc/mono/2.0 | aspx DefaultWsdlHelpGenerator.aspxDefaultWsdlHelpGenerator.aspx |
122:316 (11%)142:336 (11%) | view |
| 172 | x 2 | Blog-WpfNetCore/ExpenseIt/ExpenseItDemoBlog-WpfNetCore/ExpenseItNetCore | xaml CreateExpenseReportDialogBox.xamlCreateExpenseReportDialogBox.xaml |
1:288 (100%)1:288 (100%) | view |
| 167 | x 2 | Blog-WpfNetCore/ExpenseIt/ExpenseItDemoBlog-WpfNetCore/ExpenseItNetCore | xaml App.xamlApp.xaml |
1:240 (100%)1:240 (100%) | view |
| 136 | x 2 | Blog-WpfNetCore/ExpenseIt/ExpenseItDemoBlog-WpfNetCore/ExpenseItNetCore | xaml MainWindow.xamlMainWindow.xaml |
1:222 (100%)1:222 (100%) | view |
| 127 | x 2 | Blog-OptionalPackages/My...up/6a8a1fba/MyEmployeesBlog-OptionalPackages/My...0abcc/ExportDataLibrary |  NuGetUpgradeLog.htmlNuGetUpgradeLog.html |
1:150 (92%)1:150 (93%) | view |
| 125 | x 2 | Blog-WpfNetCore/ExpenseIt/EditBoxControlLibraryBlog-WpfNetCore/ExpenseItNetCore |  EditBox.csEditBox.cs |
31:342 (100%)31:342 (100%) | view |
| 112 | x 2 | Blog-AppTransition/ExpenseIt/ExpenseItDemoBlog-WpfNetCore/ExpenseIt/ExpenseItDemo | xaml Resources.xamlApp.xaml |
46:210 (47%)76:240 (67%) | view |
| 112 | x 2 | Blog-AppTransition/ExpenseIt/ExpenseItDemoBlog-WpfNetCore/ExpenseItNetCore | xaml Resources.xamlApp.xaml |
46:210 (47%)76:240 (67%) | view |
| 100 | x 2 | Blog-OptionalPackages/My...ionPackages/MyEmployeesBlog-OptionalPackages/My...nalPackages/MyEmployees | Form1.Designer.csForm1.Designer.cs |
1:155 (100%)1:155 (100%) | view |
| 67 | x 2 | UWPAPIsUsedFromUnityEXEA..._Data/Mono/etc/mono/1.0UWPAPIsUsedFromUnityEXEA..._Data/Mono/etc/mono/2.0 | aspx DefaultWsdlHelpGenerator.aspxDefaultWsdlHelpGenerator.aspx |
1722:1815 (4%)1798:1891 (4%) | view |
| 59 | x 2 | UWPAPIsUsedFromUnityEXEA..._Data/Mono/etc/mono/1.0UWPAPIsUsedFromUnityEXEA..._Data/Mono/etc/mono/2.0 | aspx DefaultWsdlHelpGenerator.aspxDefaultWsdlHelpGenerator.aspx |
1633:1719 (3%)1705:1791 (3%) | view |
| 53 | x 2 | Blog-WpfNetCore/ExpenseIt/EditBoxControlLibraryBlog-WpfNetCore/ExpenseItNetCore | EditboxAdorner.csEditboxAdorner.cs |
28:168 (100%)28:168 (100%) | view |
| 52 | x 2 | Blog-AppTransition/ExpenseIt/ExpenseItDemoBlog-WpfNetCore/ExpenseIt/ExpenseItDemo | xaml Resources.xamlCreateExpenseReportDialogBox.xaml |
275:350 (22%)21:96 (30%) | view |
| 52 | x 2 | Blog-AppTransition/ExpenseIt/ExpenseItDemoBlog-WpfNetCore/ExpenseItNetCore | xaml Resources.xamlCreateExpenseReportDialogBox.xaml |
275:350 (22%)21:96 (30%) | view |
| 49 | x 2 | Blog-AdvancedInstaller/MyEmployeesBlog-Scripting/MyEmployees/MyEmployees | AboutForm.Designer.csAboutForm.Designer.cs |
1:86 (100%)1:86 (100%) | view |
| 49 | x 2 | Blog-AdvancedInstaller/MyEmployeesBlog-OptionalPackages/My...ionPackages/MyEmployees | AboutForm.Designer.csAboutForm.Designer.cs |
1:86 (100%)1:86 (100%) | view |
| 49 | x 2 | Blog-AdvancedInstaller/MyEmployeesBlog-OptionalPackages/My...nalPackages/MyEmployees | AboutForm.Designer.csAboutForm.Designer.cs |
1:86 (100%)1:86 (100%) | view |
| 49 | x 2 | Blog-OptionalPackages/My...nalPackages/MyEmployeesBlog-Scripting/MyEmployees/MyEmployees | AboutForm.Designer.csAboutForm.Designer.cs |
1:86 (100%)1:86 (100%) | view |
Duplicated Units
The list of top 20 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 75 | x 2 | Blog-OptionalPackages/My...ionPackages/MyEmployeesBlog-OptionalPackages/My...nalPackages/MyEmployees | Form1.Designer.csForm1.Designer.cs |
29:135 29:135 | view |
| 38 | x 4 | Blog-AdvancedInstaller/MyEmployeesBlog-OptionalPackages/My...ionPackages/MyEmployeesBlog-OptionalPackages/My...nalPackages/MyEmployeesBlog-Scripting/MyEmployees/MyEmployees | AboutForm.Designer.csAboutForm.Designer.csAboutForm.Designer.csAboutForm.Designer.cs |
29:80 29:80 29:80 29:80 | view |
| 26 | x 3 | Blog-AdvancedInstaller/MyEmployeesBlog-OptionalPackages/My...ionPackages/MyEmployeesBlog-OptionalPackages/My...nalPackages/MyEmployees | Form1.csForm1.csForm1.cs |
21:50 42:71 31:60 | view |
| 20 | x 2 | Blog-WinRTComponent/WinR.../WinRTComponent.UWPHeadMSIX-Shared-Storage-Folder/App03-UWP | App.xaml.csApp.xaml.cs |
40:74 40:74 | view |
| 17 | x 2 | Blog-WpfNetCore/ExpenseIt/EditBoxControlLibraryBlog-WpfNetCore/ExpenseItNetCore | EditBox.csEditBox.cs |
51:77 51:77 | view |
| 16 | x 2 | Blog-OptionalPackages/My...kages/ExportDataLibraryBlog-OptionalPackages/My...kages/ExportDataLibrary | ExportData.csExportData.cs |
22:39 15:32 | view |
| 15 | x 2 | Blog-OptionalPackages/My...ionPackages/MyEmployeesBlog-OptionalPackages/My...nalPackages/MyEmployees | Form1.csForm1.cs |
73:89 62:78 | view |
| 15 | x 2 | Blog-WpfNetCore/ExpenseIt/EditBoxControlLibraryBlog-WpfNetCore/ExpenseItNetCore | EditBox.csEditBox.cs |
121:142 121:142 | view |
| 14 | x 3 | Blog-AppTransition/ExpenseIt/ExpenseItDemoBlog-WpfNetCore/ExpenseIt/ExpenseItDemoBlog-WpfNetCore/ExpenseItNetCore | MainWindow.csMainWindow.csMainWindow.cs |
37:59 32:54 32:54 | view |
| 14 | x 3 | Blog-AppTransition/Expen...xpenseItDemo/ValidationBlog-WpfNetCore/ExpenseIt/ExpenseItDemo/ValidationBlog-WpfNetCore/ExpenseItNetCore/Validation | NumberValidationrule.csNumberValidationrule.csNumberValidationrule.cs |
26:45 26:45 26:45 | view |
| 13 | x 2 | Blog-OptionalPackages/My...ionPackages/MyEmployeesBlog-OptionalPackages/My...nalPackages/MyEmployees | Form1.csForm1.cs |
91:104 80:93 | view |
| 13 | x 2 | Blog-WpfNetCore/ExpenseIt/EditBoxControlLibraryBlog-WpfNetCore/ExpenseItNetCore | EditBox.csEditBox.cs |
257:272 257:272 | view |
| 13 | x 2 | Blog-WpfNetCore/ExpenseIt/EditBoxControlLibraryBlog-WpfNetCore/ExpenseItNetCore | EditboxAdorner.csEditboxAdorner.cs |
118:136 118:136 | view |
| 12 | x 2 | Blog-WpfNetCore/ExpenseIt/EditBoxControlLibraryBlog-WpfNetCore/ExpenseItNetCore | EditboxAdorner.csEditboxAdorner.cs |
86:98 86:98 | view |
| 12 | x 2 | Docs-ContextMenuSample/ExplorerCommandVerbDocs-ContextMenuSample/ExplorerCommandVerb |  RegisterExtension.cppRegisterExtension.cpp |
302:316 318:332 | view |
| 11 | x 2 | Blog-WpfNetCore/ExpenseIt/EditBoxControlLibraryBlog-WpfNetCore/ExpenseItNetCore | EditboxAdorner.csEditboxAdorner.cs |
64:81 64:81 | view |
| 8 | x 2 | Blog-WpfNetCore/ExpenseIt/EditBoxControlLibraryBlog-WpfNetCore/ExpenseItNetCore | EditBox.csEditBox.cs |
312:320 312:320 | view |
| 8 | x 2 | Blog-WpfNetCore/ExpenseIt/ExpenseItDemoBlog-WpfNetCore/ExpenseItNetCore | CreateExpenseReportDialogBox.csCreateExpenseReportDialogBox.cs |
31:40 31:40 | view |
| 8 | x 2 | Blog-WpfNetCore/ExpenseIt/ExpenseItDemoBlog-WpfNetCore/ExpenseItNetCore | MainWindow.csMainWindow.cs |
92:106 92:106 | view |
| 7 | x 9 | Blog-AdvancedInstaller/MyEmployeesBlog-AdvancedInstaller/MyEmployeesBlog-ModernizationStory/DynamicWindowsFormsBlog-OptionalPackages/My...ionPackages/MyEmployeesBlog-OptionalPackages/My...ionPackages/MyEmployeesBlog-OptionalPackages/My...nalPackages/MyEmployeesBlog-OptionalPackages/My...nalPackages/MyEmployeesBlog-Scripting/MyEmployees/MyEmployeesBlog-Scripting/MyEmployees/MyEmployees | AboutForm.Designer.csForm1.Designer.csFormDynamic.Designer.csAboutForm.Designer.csForm1.Designer.csAboutForm.Designer.csForm1.Designer.csAboutForm.Designer.csForm1.Designer.cs |
14:21 14:21 14:21 14:21 14:21 14:21 14:21 14:21 14:21 | view |