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
- 22% duplication:
- 18,184 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 4,142 duplicated lines
- 5,051 duplicates
Duplication per Extension
Duplication per Component (primary)
Longest Duplicates
The list of 50 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 39 | x 2 | build/extracted-examples...ction.method.isReusablebuild/extracted-examples...tion.method.setReusable | 8:63 (100%)8:62 (100%) | view | |
| 35 | x 2 | build/extracted-examples...lockIterator.method.keybuild/extracted-examples...ckIterator.method.valid | 8:59 (100%)8:59 (100%) | view | |
| 35 | x 2 | build/extracted-examples...Iterator.method.currentbuild/extracted-examples...lockIterator.method.key | 8:59 (100%)8:59 (100%) | view | |
| 35 | x 2 | build/extracted-examples...Iterator.method.currentbuild/extracted-examples...ockIterator.method.next | 8:59 (100%)8:59 (100%) | view | |
| 35 | x 2 | build/extracted-examples...ockIterator.method.nextbuild/extracted-examples...ckIterator.method.valid | 8:59 (100%)8:59 (100%) | view | |
| 35 | x 2 | build/extracted-examples...Iterator.method.currentbuild/extracted-examples...ckIterator.method.valid | 8:59 (100%)8:59 (100%) | view | |
| 35 | x 2 | build/extracted-examples...lockIterator.method.keybuild/extracted-examples...ockIterator.method.next | 8:59 (100%)8:59 (100%) | view | |
| 34 | x 2 | build/extracted-examples...perations/28-guidelinesbuild/extracted-examples...-operations/31-examples | 8:66 (100%)8:66 (100%) | view | |
| 33 | x 2 | build/extracted-examples...RowIterator.method.nextbuild/extracted-examples...owIterator.method.valid | 8:54 (100%)8:54 (100%) | view | |
| 33 | x 2 | build/extracted-examples...lRowIterator.method.keybuild/extracted-examples...owIterator.method.valid | 8:54 (100%)8:54 (100%) | view | |
| 33 | x 2 | build/extracted-examples...Iterator.method.currentbuild/extracted-examples...owIterator.method.valid | 8:54 (100%)8:54 (100%) | view | |
| 33 | x 2 | build/extracted-examples...lRow.method.getIteratorbuild/extracted-examples...RowIterator.method.next | 8:54 (100%)8:54 (100%) | view | |
| 33 | x 2 | build/extracted-examples...lRowIterator.method.keybuild/extracted-examples...RowIterator.method.next | 8:54 (100%)8:54 (100%) | view | |
| 33 | x 2 | build/extracted-examples...lRow.method.getIteratorbuild/extracted-examples...Iterator.method.current | 8:54 (100%)8:54 (100%) | view | |
| 33 | x 2 | build/extracted-examples...lRow.method.getIteratorbuild/extracted-examples...lRowIterator.method.key | 8:54 (100%)8:54 (100%) | view | |
| 33 | x 2 | build/extracted-examples...lRow.method.getIteratorbuild/extracted-examples...owIterator.method.valid | 8:54 (100%)8:54 (100%) | view | |
| 33 | x 2 | build/extracted-examples...Iterator.method.currentbuild/extracted-examples...RowIterator.method.next | 8:54 (100%)8:54 (100%) | view | |
| 33 | x 2 | build/extracted-examples...Iterator.method.currentbuild/extracted-examples...lRowIterator.method.key | 8:54 (100%)8:54 (100%) | view | |
| 26 | x 2 | src/site/controllerssrc/site/controllers | 60:87 (21%)52:79 (24%) | view | |
| 25 | x 2 | build/extracted-examples...wIterator.method.rewindbuild/extracted-examples...owIterator.method.valid | 8:40 (65%)8:40 (75%) | view | |
| 25 | x 2 | build/extracted-examples...Iterator.method.currentbuild/extracted-examples...wIterator.method.rewind | 8:40 (75%)8:40 (65%) | view | |
| 25 | x 2 | build/extracted-examples...lRowIterator.method.keybuild/extracted-examples...wIterator.method.rewind | 8:40 (75%)8:40 (65%) | view | |
| 25 | x 2 | src/markdown-extensionssrc/markdown-extensions | 157:189 (19%)51:83 (43%) | view | |
| 25 | x 2 | build/extracted-examples...RowIterator.method.nextbuild/extracted-examples...wIterator.method.rewind | 8:40 (75%)8:40 (65%) | view | |
| 25 | x 2 | build/extracted-examples...lRow.method.getIteratorbuild/extracted-examples...wIterator.method.rewind | 8:40 (75%)8:40 (65%) | view | |
| 24 | x 2 | build/extracted-examples...od.getSuccessfulResultsbuild/extracted-examples...od.numSuccessfulQueries | 8:34 (64%)8:34 (70%) | view | |
| 23 | x 2 | build/extracted-examples...n.method.mysqlErrorCodebuild/extracted-examples...ception.method.timedOut | 8:31 (62%)8:31 (62%) | view | |
| 23 | x 2 | build/extracted-examples...n.method.mysqlErrorCodebuild/extracted-examples...method.mysqlErrorString | 8:31 (62%)8:31 (62%) | view | |
| 23 | x 2 | build/extracted-examples...eption.method.getResultbuild/extracted-examples...ception.method.timedOut | 8:31 (62%)8:31 (62%) | view | |
| 23 | x 2 | build/extracted-examples...Exception.method.failedbuild/extracted-examples...eption.method.getResult | 8:31 (62%)8:31 (62%) | view | |
| 23 | x 2 | build/extracted-examples...Exception.method.failedbuild/extracted-examples...n.method.mysqlErrorCode | 8:31 (62%)8:31 (62%) | view | |
| 23 | x 2 | build/extracted-examples...eption.method.getResultbuild/extracted-examples...method.mysqlErrorString | 8:31 (62%)8:31 (62%) | view | |
| 23 | x 2 | build/extracted-examples...eption.method.getResultbuild/extracted-examples...n.method.mysqlErrorCode | 8:31 (62%)8:31 (62%) | view | |
| 23 | x 2 | build/extracted-examples...Exception.method.failedbuild/extracted-examples...method.mysqlErrorString | 8:31 (62%)8:31 (62%) | view | |
| 23 | x 2 | build/extracted-examples...method.mysqlErrorStringbuild/extracted-examples...ception.method.timedOut | 8:31 (62%)8:31 (62%) | view | |
| 23 | x 2 | build/extracted-examples...Exception.method.failedbuild/extracted-examples...ception.method.timedOut | 8:31 (62%)8:31 (62%) | view | |
| 22 | x 2 | build/extracted-examples...ult.method.lastInsertIdbuild/extracted-examples....method.numRowsAffected | 8:30 (64%)8:30 (64%) | view | |
| 22 | x 2 | build/extracted-examples.../21-XHP/01-introductionsrc/site/xhp | 13:38 (95%)21:46 (78%) | view | |
| 20 | x 2 | build/extracted-examples...sqlRow.method.fieldTypebuild/extracted-examples...cMysqlRow.method.isNull | 8:32 (68%)8:32 (64%) | view | |
| 20 | x 2 | build/extracted-examples...AsyncMysqlRow.method.atbuild/extracted-examples...ncMysqlRow.method.count | 8:32 (68%)8:32 (68%) | view | |
| 20 | x 2 | build/extracted-examples...lock.method.getIteratorbuild/extracted-examples...lockIterator.method.key | 8:34 (58%)8:34 (57%) | view | |
| 20 | x 2 | build/extracted-examples...Exception.method.getKeybuild/extracted-examples...rException.method.getOp | 6:32 (95%)6:32 (86%) | view | |
| 20 | x 2 | build/extracted-examples...AsyncMysqlRow.method.atbuild/extracted-examples...ow.method.getFieldAsInt | 8:32 (68%)8:32 (68%) | view | |
| 20 | x 2 | build/extracted-examples...lock.method.getIteratorbuild/extracted-examples...ckIterator.method.valid | 8:34 (58%)8:34 (57%) | view | |
| 20 | x 2 | build/extracted-examples...AsyncMysqlRow.method.atbuild/extracted-examples...sqlRow.method.fieldType | 8:32 (68%)8:32 (68%) | view | |
| 20 | x 2 | build/extracted-examples...sqlRow.method.fieldTypebuild/extracted-examples...ow.method.getFieldAsInt | 8:32 (68%)8:32 (68%) | view | |
| 20 | x 2 | build/extracted-examples...AsyncMysqlRow.method.atbuild/extracted-examples...cMysqlRow.method.isNull | 8:32 (68%)8:32 (64%) | view | |
| 20 | x 2 | build/extracted-examples...lock.method.getIteratorbuild/extracted-examples...ockIterator.method.next | 8:34 (58%)8:34 (57%) | view | |
| 20 | x 2 | build/extracted-examples...ncMysqlRow.method.countbuild/extracted-examples...sqlRow.method.fieldType | 8:32 (68%)8:32 (68%) | view | |
| 20 | x 2 | build/extracted-examples...ow.method.getFieldAsIntbuild/extracted-examples...cMysqlRow.method.isNull | 8:32 (68%)8:32 (64%) | view |
Duplicated Units
The list of top 14 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 23 | x 4 | build/extracted-examples...ockIterator.method.nextbuild/extracted-examples...ckIterator.method.validbuild/extracted-examples...Iterator.method.currentbuild/extracted-examples...lockIterator.method.key | 19:52 19:52 19:52 19:52 | view | |
| 21 | x 5 | build/extracted-examples...lRow.method.getIteratorbuild/extracted-examples...Iterator.method.currentbuild/extracted-examples...owIterator.method.validbuild/extracted-examples...RowIterator.method.nextbuild/extracted-examples...lRowIterator.method.key | 19:47 19:47 19:47 19:47 19:47 | view | |
| 17 | x 2 | build/extracted-examples.../21-XHP/01-introductionsrc/site/xhp | 17:39 25:47 | view | |
| 11 | x 2 | build/extracted-examples...ction.method.isReusablebuild/extracted-examples...tion.method.setReusable | 8:21 8:21 | view | |
| 10 | x 2 | build/extracted-examples....HH.Map.method.containsbuild/extracted-examples....Map.method.containsKey | 7:25 7:25 | view | |
| 10 | x 2 | build/extracted-examples...ack/function.HH.Asio.vmbuild/extracted-examples...hack/function.HH.Asio.v | 20:33 19:32 | view | |
| 10 | x 2 | build/extracted-examples...ction.method.isReusablebuild/extracted-examples...tion.method.setReusable | 47:64 47:63 | view | |
| 9 | x 76 | build/extracted-examples...cMysqlRow.method.isNullbuild/extracted-examples...lRow.method.getIteratorbuild/extracted-examples...Connection.method.querybuild/extracted-examples...ctResult.method.endTimebuild/extracted-examples...qlRowBlock.method.countbuild/extracted-examples...lock.method.getIteratorbuild/extracted-examples...ion.method.warningCountbuild/extracted-examples...method.getFieldAsStringbuild/extracted-examples...sult.method.mysql_errorbuild/extracted-examples...lConnection.method.port... | 8:18 8:18 8:18 8:18 8:18 8:18 8:18 8:18 8:18 8:18 ... | view | |
| 9 | x 6 | build/extracted-examples...n.method.mysqlErrorCodebuild/extracted-examples...method.mysqlErrorStringbuild/extracted-examples...eption.method.getResultbuild/extracted-examples...Exception.method.failedbuild/extracted-examples...tion.method.__constructbuild/extracted-examples...ception.method.timedOut | 8:18 8:18 8:18 8:18 8:18 8:18 | view | |
| 8 | x 2 | src/site/controllerssrc/site/controllers | 36:45 48:57 | view | |
| 7 | x 2 | build/extracted-examples...-operations/31-examplesbuild/extracted-examples...perations/28-guidelines | 57:67 57:67 | view | |
| 7 | x 2 | build/extracted-examples...-operations/31-examplesbuild/extracted-examples...perations/28-guidelines | 56:66 53:63 | view | |
| 7 | x 2 | build/extracted-examples...ction.HH.Asio.curl_execbuild/extracted-examples...nction.curl_multi_await | 16:25 50:59 | view | |
| 6 | x 2 | build/extracted-examples...-operations/31-examplesbuild/extracted-examples...perations/28-guidelines | 33:43 33:43 | view |