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
- 53% duplication:
- 8,116 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 4,322 duplicated lines
- 1,013 duplicates
Duplication per Extension
Duplication per Component (primary)
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 133 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItems |  TransactGetItem.javaTransactWriteItem.java |
50:278 (86%)96:324 (72%) | view |
| 110 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithQueriesDynamoDB-SDK-Examples/java/WorkingWithQueries | QueryWithFilterExpression.javaQueryWithProjectionExpression.java |
54:232 (83%)37:215 (90%) | view |
| 105 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItems | BatchGetItem.javaUpdateItemConditional.java |
56:228 (81%)51:225 (82%) | view |
| 105 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItems | BatchWriteItem.javaUpdateItemConditional.java |
87:259 (70%)51:225 (82%) | view |
| 105 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItems | BatchGetItem.javaBatchWriteItem.java |
56:228 (81%)87:259 (70%) | view |
| 97 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItems | DeleteItem.javaPutItemConditional.java |
45:205 (85%)57:217 (78%) | view |
| 96 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithQueriesDynamoDB-SDK-Examples/java/WorkingWithQueries | QueryConsistentRead.javaQueryWithSortKey.java |
43:201 (86%)43:201 (88%) | view |
| 95 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItems | GetItem.javaUpdateItem.java |
38:196 (89%)42:200 (88%) | view |
| 95 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItems | PutItem.javaUpdateItem.java |
45:203 (83%)42:200 (88%) | view |
| 95 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItems | GetItem.javaPutItem.java |
38:196 (89%)45:203 (83%) | view |
| 93 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItems | PutItem.javaPutItemConditional.java |
45:201 (81%)57:213 (75%) | view |
| 93 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithQueries | UpdateItem.javaQueryWithSortKey.java |
50:200 (86%)51:201 (86%) | view |
| 93 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithQueries | GetItem.javaQueryConsistentRead.java |
46:196 (87%)51:201 (83%) | view |
| 93 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithQueries | PutItem.javaQueryWithSortKey.java |
53:203 (81%)51:201 (86%) | view |
| 93 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItems | DeleteItem.javaPutItem.java |
45:201 (81%)45:201 (81%) | view |
| 93 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithQueries | UpdateItem.javaQueryConsistentRead.java |
50:200 (86%)51:201 (83%) | view |
| 93 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItems | GetItem.javaPutItemConditional.java |
38:194 (87%)57:213 (75%) | view |
| 93 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithQueries | GetItem.javaQueryWithSortKey.java |
46:196 (87%)51:201 (86%) | view |
| 93 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItems | PutItemConditional.javaUpdateItem.java |
57:213 (75%)42:198 (86%) | view |
| 93 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithQueries | PutItem.javaQueryConsistentRead.java |
53:203 (81%)51:201 (83%) | view |
Duplicated Units
The list of top 10 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 19 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItems | PutItemConditional.javaDeleteItem.java |
200:219 188:207 | view |
| 19 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithQueriesDynamoDB-SDK-Examples/java/WorkingWithQueries | QueryWithProjectionExpression.javaQueryWithFilterExpression.java |
198:217 215:234 | view |
| 18 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItems | TransactWriteItem.javaTransactGetItem.java |
308:326 262:280 | view |
| 18 | x 2 | DynamoDB-SDK-Examples/go...ables/updateGlobalTableDynamoDB-SDK-Examples/go...es/addGlobalTableRegion |  updateGlobalTable.goaddGlobalTableRegion.go |
25:47 25:47 | view |
| 17 | x 8 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithQueriesDynamoDB-SDK-Examples/java/WorkingWithQueries | GetItem.javaBatchGetItem.javaUpdateItemConditional.javaBatchWriteItem.javaUpdateItem.javaPutItem.javaQueryConsistentRead.javaQueryWithSortKey.java |
181:198 213:230 210:227 244:261 185:202 188:205 186:203 186:203 | view |
| 11 | x 5 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItems | BatchGetItem.javaUpdateItemConditional.javaBatchWriteItem.javaTransactWriteItem.javaTransactGetItem.java |
196:207 193:204 227:238 236:247 190:201 | view |
| 11 | x 2 | DynamoDB-SDK-Examples/java/WorkingWithQueriesDynamoDB-SDK-Examples/java/WorkingWithQueries | QueryWithProjectionExpression.javaQueryWithFilterExpression.java |
181:192 198:209 | view |
| 10 | x 10 | DynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithItemsDynamoDB-SDK-Examples/java/WorkingWithTablesDynamoDB-SDK-Examples/java/WorkingWithTablesDynamoDB-SDK-Examples/java/WorkingWithTablesDynamoDB-SDK-Examples/java/WorkingWithQueriesDynamoDB-SDK-Examples/java/WorkingWithQueries | GetItem.javaPutItemConditional.javaDeleteItem.javaUpdateItem.javaPutItem.javaDeleteTable.javaCreateTableOnDemand.javaCreateTableProvisioned.javaQueryConsistentRead.javaQueryWithSortKey.java |
165:175 184:194 172:182 169:179 172:182 143:153 142:152 149:159 170:180 170:180 | view |
| 8 | x 19 | DynamoDB-SDK-Examples/go...gWithTables/deleteTableDynamoDB-SDK-Examples/go...ables/updateGlobalTableDynamoDB-SDK-Examples/go...thTables/disableStreamsDynamoDB-SDK-Examples/go...ables/updateAutoscalingDynamoDB-SDK-Examples/go...les/createTableOnDemandDynamoDB-SDK-Examples/go...bles/disableAutoscalingDynamoDB-SDK-Examples/go...ables/enableAutoscalingDynamoDB-SDK-Examples/go...les/describeGlobalTableDynamoDB-SDK-Examples/go...ithTables/enableStreamsDynamoDB-SDK-Examples/go...thTables/describeLimits... | deleteTable.goupdateGlobalTable.godisableStreams.goupdateAutoscaling.gocreateTableOnDemand.godisableAutoscaling.goenableAutoscaling.godescribeGlobalTable.goenableStreams.godescribeLimits.go... |
13:23 13:23 13:23 17:27 13:23 18:28 115:125 13:23 13:23 12:22 ... | view |
| 6 | x 2 | DynamoDB-SDK-Examples/python/WorkingWithItemsDynamoDB-SDK-Examples/python/WorkingWithItems |  batch_get.pyget_item.py |
0:0 0:0 | view |