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
- 68% duplication:
- 2,622 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 1,783 duplicated lines
- 417 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
nodejs10.x/serverless-api-backend (98%)
--> nodejs14.x/serverless-api-backend (98%)
596
18 file pairs
details...
nodejs10.x/file-processing (98%)
--> nodejs14.x/file-processing (98%)
310
10 file pairs
details...
nodejs10.x/queue-processing (89%)
--> nodejs14.x/queue-processing (89%)
208
6 file pairs
details...
nodejs10.x/notifications-processing (89%)
--> nodejs14.x/notifications-processing (89%)
206
6 file pairs
details...
nodejs10.x/scheduled-job (92%)
--> nodejs14.x/scheduled-job (92%)
206
6 file pairs
details...
nodejs10.x/author-from-scratch (79%)
--> nodejs14.x/author-from-scratch (79%)
168
6 file pairs
details...
nodejs10.x/author-from-scratch (74%)
--> nodejs10.x/scheduled-job (71%)
158
6 file pairs
details...
nodejs14.x/author-from-scratch (74%)
--> nodejs14.x/scheduled-job (71%)
158
6 file pairs
details...
nodejs10.x/author-from-scratch (68%)
--> nodejs10.x/notifications-processing (63%)
146
6 file pairs
details...
nodejs10.x/author-from-scratch (68%)
--> nodejs14.x/notifications-processing (63%)
146
6 file pairs
details...
nodejs14.x/author-from-scratch (68%)
--> nodejs14.x/notifications-processing (63%)
146
6 file pairs
details...
nodejs10.x/scheduled-job (65%)
--> nodejs14.x/queue-processing (62%)
146
6 file pairs
details...
nodejs14.x/notifications-processing (63%)
--> nodejs14.x/scheduled-job (65%)
146
6 file pairs
details...
nodejs14.x/author-from-scratch (68%)
--> nodejs14.x/queue-processing (62%)
146
6 file pairs
details...
nodejs10.x/author-from-scratch (68%)
--> nodejs14.x/scheduled-job (65%)
146
6 file pairs
details...
nodejs10.x/queue-processing (62%)
--> nodejs10.x/scheduled-job (65%)
146
6 file pairs
details...
nodejs10.x/queue-processing (62%)
--> nodejs14.x/scheduled-job (65%)
146
6 file pairs
details...
nodejs14.x/queue-processing (62%)
--> nodejs14.x/scheduled-job (65%)
146
6 file pairs
details...
nodejs14.x/notifications-processing (63%)
--> nodejs14.x/queue-processing (62%)
146
6 file pairs
details...
nodejs10.x/author-from-scratch (68%)
--> nodejs14.x/queue-processing (62%)
146
6 file pairs
details...
nodejs10.x/author-from-scratch (68%)
--> nodejs10.x/queue-processing (62%)
146
6 file pairs
details...
nodejs10.x/notifications-processing (63%)
--> nodejs10.x/scheduled-job (65%)
146
6 file pairs
details...
nodejs10.x/queue-processing (62%)
--> nodejs14.x/author-from-scratch (68%)
146
6 file pairs
details...
nodejs10.x/scheduled-job (65%)
--> nodejs14.x/author-from-scratch (68%)
146
6 file pairs
details...
nodejs10.x/notifications-processing (63%)
--> nodejs14.x/scheduled-job (65%)
146
6 file pairs
details...
nodejs10.x/queue-processing (62%)
--> nodejs14.x/notifications-processing (63%)
146
6 file pairs
details...
nodejs10.x/notifications-processing (63%)
--> nodejs10.x/queue-processing (62%)
146
6 file pairs
details...
nodejs10.x/notifications-processing (63%)
--> nodejs14.x/author-from-scratch (68%)
146
6 file pairs
details...
nodejs10.x/notifications-processing (63%)
--> nodejs14.x/queue-processing (62%)
146
6 file pairs
details...
nodejs10.x/scheduled-job (65%)
--> nodejs14.x/notifications-processing (63%)
146
6 file pairs
details...
nodejs14.x/file-processing (42%)
--> nodejs14.x/scheduled-job (60%)
134
5 file pairs
details...
nodejs10.x/file-processing (42%)
--> nodejs10.x/queue-processing (57%)
134
5 file pairs
details...
nodejs10.x/scheduled-job (60%)
--> nodejs14.x/file-processing (42%)
134
5 file pairs
details...
nodejs10.x/scheduled-job (60%)
--> nodejs14.x/serverless-api-backend (22%)
134
5 file pairs
details...
nodejs14.x/author-from-scratch (63%)
--> nodejs14.x/file-processing (42%)
134
5 file pairs
details...
nodejs14.x/author-from-scratch (63%)
--> nodejs14.x/serverless-api-backend (22%)
134
5 file pairs
details...
nodejs10.x/notifications-processing (58%)
--> nodejs14.x/serverless-api-backend (22%)
134
5 file pairs
details...
nodejs10.x/queue-processing (57%)
--> nodejs14.x/file-processing (42%)
134
5 file pairs
details...
nodejs14.x/notifications-processing (58%)
--> nodejs14.x/serverless-api-backend (22%)
134
5 file pairs
details...
nodejs10.x/author-from-scratch (63%)
--> nodejs10.x/file-processing (42%)
134
5 file pairs
details...
nodejs10.x/serverless-api-backend (22%)
--> nodejs14.x/author-from-scratch (63%)
134
5 file pairs
details...
nodejs10.x/serverless-api-backend (22%)
--> nodejs14.x/notifications-processing (58%)
134
5 file pairs
details...
nodejs10.x/scheduled-job (60%)
--> nodejs10.x/serverless-api-backend (22%)
134
5 file pairs
details...
nodejs10.x/file-processing (42%)
--> nodejs10.x/serverless-api-backend (22%)
134
5 file pairs
details...
nodejs10.x/file-processing (42%)
--> nodejs14.x/queue-processing (57%)
134
5 file pairs
details...
nodejs14.x/file-processing (42%)
--> nodejs14.x/serverless-api-backend (22%)
134
5 file pairs
details...
nodejs10.x/file-processing (42%)
--> nodejs10.x/scheduled-job (60%)
134
5 file pairs
details...
nodejs10.x/notifications-processing (58%)
--> nodejs10.x/serverless-api-backend (22%)
134
5 file pairs
details...
nodejs10.x/queue-processing (57%)
--> nodejs14.x/serverless-api-backend (22%)
134
5 file pairs
details...
nodejs10.x/queue-processing (57%)
--> nodejs10.x/serverless-api-backend (22%)
134
5 file pairs
details...
nodejs10.x/file-processing (42%)
--> nodejs14.x/author-from-scratch (63%)
134
5 file pairs
details...
nodejs14.x/file-processing (42%)
--> nodejs14.x/queue-processing (57%)
134
5 file pairs
details...
nodejs14.x/queue-processing (57%)
--> nodejs14.x/serverless-api-backend (22%)
134
5 file pairs
details...
nodejs14.x/file-processing (42%)
--> nodejs14.x/notifications-processing (58%)
134
5 file pairs
details...
nodejs10.x/file-processing (42%)
--> nodejs14.x/notifications-processing (58%)
134
5 file pairs
details...
nodejs10.x/author-from-scratch (63%)
--> nodejs14.x/file-processing (42%)
134
5 file pairs
details...
nodejs10.x/serverless-api-backend (22%)
--> nodejs14.x/scheduled-job (60%)
134
5 file pairs
details...
nodejs10.x/notifications-processing (58%)
--> nodejs14.x/file-processing (42%)
134
5 file pairs
details...
nodejs10.x/author-from-scratch (63%)
--> nodejs14.x/serverless-api-backend (22%)
134
5 file pairs
details...
nodejs10.x/file-processing (42%)
--> nodejs10.x/notifications-processing (58%)
134
5 file pairs
details...
nodejs10.x/file-processing (42%)
--> nodejs14.x/scheduled-job (60%)
134
5 file pairs
details...
nodejs10.x/file-processing (42%)
--> nodejs14.x/serverless-api-backend (22%)
134
5 file pairs
details...
nodejs10.x/serverless-api-backend (22%)
--> nodejs14.x/queue-processing (57%)
134
5 file pairs
details...
nodejs14.x/scheduled-job (60%)
--> nodejs14.x/serverless-api-backend (22%)
134
5 file pairs
details...
nodejs10.x/serverless-api-backend (22%)
--> nodejs14.x/file-processing (42%)
134
5 file pairs
details...
nodejs10.x/author-from-scratch (63%)
--> nodejs10.x/serverless-api-backend (22%)
134
5 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| nodejs10.x/serverless-api-backend (98%) --> nodejs14.x/serverless-api-backend (98%) |
596 | 18 file pairs | details... |
| nodejs10.x/file-processing (98%) --> nodejs14.x/file-processing (98%) |
310 | 10 file pairs | details... |
| nodejs10.x/queue-processing (89%) --> nodejs14.x/queue-processing (89%) |
208 | 6 file pairs | details... |
| nodejs10.x/notifications-processing (89%) --> nodejs14.x/notifications-processing (89%) |
206 | 6 file pairs | details... |
| nodejs10.x/scheduled-job (92%) --> nodejs14.x/scheduled-job (92%) |
206 | 6 file pairs | details... |
| nodejs10.x/author-from-scratch (79%) --> nodejs14.x/author-from-scratch (79%) |
168 | 6 file pairs | details... |
| nodejs10.x/author-from-scratch (74%) --> nodejs10.x/scheduled-job (71%) |
158 | 6 file pairs | details... |
| nodejs14.x/author-from-scratch (74%) --> nodejs14.x/scheduled-job (71%) |
158 | 6 file pairs | details... |
| nodejs10.x/author-from-scratch (68%) --> nodejs10.x/notifications-processing (63%) |
146 | 6 file pairs | details... |
| nodejs10.x/author-from-scratch (68%) --> nodejs14.x/notifications-processing (63%) |
146 | 6 file pairs | details... |
| nodejs14.x/author-from-scratch (68%) --> nodejs14.x/notifications-processing (63%) |
146 | 6 file pairs | details... |
| nodejs10.x/scheduled-job (65%) --> nodejs14.x/queue-processing (62%) |
146 | 6 file pairs | details... |
| nodejs14.x/notifications-processing (63%) --> nodejs14.x/scheduled-job (65%) |
146 | 6 file pairs | details... |
| nodejs14.x/author-from-scratch (68%) --> nodejs14.x/queue-processing (62%) |
146 | 6 file pairs | details... |
| nodejs10.x/author-from-scratch (68%) --> nodejs14.x/scheduled-job (65%) |
146 | 6 file pairs | details... |
| nodejs10.x/queue-processing (62%) --> nodejs10.x/scheduled-job (65%) |
146 | 6 file pairs | details... |
| nodejs10.x/queue-processing (62%) --> nodejs14.x/scheduled-job (65%) |
146 | 6 file pairs | details... |
| nodejs14.x/queue-processing (62%) --> nodejs14.x/scheduled-job (65%) |
146 | 6 file pairs | details... |
| nodejs14.x/notifications-processing (63%) --> nodejs14.x/queue-processing (62%) |
146 | 6 file pairs | details... |
| nodejs10.x/author-from-scratch (68%) --> nodejs14.x/queue-processing (62%) |
146 | 6 file pairs | details... |
| nodejs10.x/author-from-scratch (68%) --> nodejs10.x/queue-processing (62%) |
146 | 6 file pairs | details... |
| nodejs10.x/notifications-processing (63%) --> nodejs10.x/scheduled-job (65%) |
146 | 6 file pairs | details... |
| nodejs10.x/queue-processing (62%) --> nodejs14.x/author-from-scratch (68%) |
146 | 6 file pairs | details... |
| nodejs10.x/scheduled-job (65%) --> nodejs14.x/author-from-scratch (68%) |
146 | 6 file pairs | details... |
| nodejs10.x/notifications-processing (63%) --> nodejs14.x/scheduled-job (65%) |
146 | 6 file pairs | details... |
| nodejs10.x/queue-processing (62%) --> nodejs14.x/notifications-processing (63%) |
146 | 6 file pairs | details... |
| nodejs10.x/notifications-processing (63%) --> nodejs10.x/queue-processing (62%) |
146 | 6 file pairs | details... |
| nodejs10.x/notifications-processing (63%) --> nodejs14.x/author-from-scratch (68%) |
146 | 6 file pairs | details... |
| nodejs10.x/notifications-processing (63%) --> nodejs14.x/queue-processing (62%) |
146 | 6 file pairs | details... |
| nodejs10.x/scheduled-job (65%) --> nodejs14.x/notifications-processing (63%) |
146 | 6 file pairs | details... |
| nodejs14.x/file-processing (42%) --> nodejs14.x/scheduled-job (60%) |
134 | 5 file pairs | details... |
| nodejs10.x/file-processing (42%) --> nodejs10.x/queue-processing (57%) |
134 | 5 file pairs | details... |
| nodejs10.x/scheduled-job (60%) --> nodejs14.x/file-processing (42%) |
134 | 5 file pairs | details... |
| nodejs10.x/scheduled-job (60%) --> nodejs14.x/serverless-api-backend (22%) |
134 | 5 file pairs | details... |
| nodejs14.x/author-from-scratch (63%) --> nodejs14.x/file-processing (42%) |
134 | 5 file pairs | details... |
| nodejs14.x/author-from-scratch (63%) --> nodejs14.x/serverless-api-backend (22%) |
134 | 5 file pairs | details... |
| nodejs10.x/notifications-processing (58%) --> nodejs14.x/serverless-api-backend (22%) |
134 | 5 file pairs | details... |
| nodejs10.x/queue-processing (57%) --> nodejs14.x/file-processing (42%) |
134 | 5 file pairs | details... |
| nodejs14.x/notifications-processing (58%) --> nodejs14.x/serverless-api-backend (22%) |
134 | 5 file pairs | details... |
| nodejs10.x/author-from-scratch (63%) --> nodejs10.x/file-processing (42%) |
134 | 5 file pairs | details... |
| nodejs10.x/serverless-api-backend (22%) --> nodejs14.x/author-from-scratch (63%) |
134 | 5 file pairs | details... |
| nodejs10.x/serverless-api-backend (22%) --> nodejs14.x/notifications-processing (58%) |
134 | 5 file pairs | details... |
| nodejs10.x/scheduled-job (60%) --> nodejs10.x/serverless-api-backend (22%) |
134 | 5 file pairs | details... |
| nodejs10.x/file-processing (42%) --> nodejs10.x/serverless-api-backend (22%) |
134 | 5 file pairs | details... |
| nodejs10.x/file-processing (42%) --> nodejs14.x/queue-processing (57%) |
134 | 5 file pairs | details... |
| nodejs14.x/file-processing (42%) --> nodejs14.x/serverless-api-backend (22%) |
134 | 5 file pairs | details... |
| nodejs10.x/file-processing (42%) --> nodejs10.x/scheduled-job (60%) |
134 | 5 file pairs | details... |
| nodejs10.x/notifications-processing (58%) --> nodejs10.x/serverless-api-backend (22%) |
134 | 5 file pairs | details... |
| nodejs10.x/queue-processing (57%) --> nodejs14.x/serverless-api-backend (22%) |
134 | 5 file pairs | details... |
| nodejs10.x/queue-processing (57%) --> nodejs10.x/serverless-api-backend (22%) |
134 | 5 file pairs | details... |
| nodejs10.x/file-processing (42%) --> nodejs14.x/author-from-scratch (63%) |
134 | 5 file pairs | details... |
| nodejs14.x/file-processing (42%) --> nodejs14.x/queue-processing (57%) |
134 | 5 file pairs | details... |
| nodejs14.x/queue-processing (57%) --> nodejs14.x/serverless-api-backend (22%) |
134 | 5 file pairs | details... |
| nodejs14.x/file-processing (42%) --> nodejs14.x/notifications-processing (58%) |
134 | 5 file pairs | details... |
| nodejs10.x/file-processing (42%) --> nodejs14.x/notifications-processing (58%) |
134 | 5 file pairs | details... |
| nodejs10.x/author-from-scratch (63%) --> nodejs14.x/file-processing (42%) |
134 | 5 file pairs | details... |
| nodejs10.x/serverless-api-backend (22%) --> nodejs14.x/scheduled-job (60%) |
134 | 5 file pairs | details... |
| nodejs10.x/notifications-processing (58%) --> nodejs14.x/file-processing (42%) |
134 | 5 file pairs | details... |
| nodejs10.x/author-from-scratch (63%) --> nodejs14.x/serverless-api-backend (22%) |
134 | 5 file pairs | details... |
| nodejs10.x/file-processing (42%) --> nodejs10.x/notifications-processing (58%) |
134 | 5 file pairs | details... |
| nodejs10.x/file-processing (42%) --> nodejs14.x/scheduled-job (60%) |
134 | 5 file pairs | details... |
| nodejs10.x/file-processing (42%) --> nodejs14.x/serverless-api-backend (22%) |
134 | 5 file pairs | details... |
| nodejs10.x/serverless-api-backend (22%) --> nodejs14.x/queue-processing (57%) |
134 | 5 file pairs | details... |
| nodejs14.x/scheduled-job (60%) --> nodejs14.x/serverless-api-backend (22%) |
134 | 5 file pairs | details... |
| nodejs10.x/serverless-api-backend (22%) --> nodejs14.x/file-processing (42%) |
134 | 5 file pairs | details... |
| nodejs10.x/author-from-scratch (63%) --> nodejs10.x/serverless-api-backend (22%) |
134 | 5 file pairs | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 25 | x 2 | nodejs10.x/author-from-scratch/cdknodejs10.x/notifications-processing/cdk |  buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs14.x/file-processing/cdknodejs14.x/scheduled-job/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs10.x/author-from-scratch/cdknodejs14.x/notifications-processing/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs14.x/author-from-scratch/cdknodejs14.x/notifications-processing/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs10.x/file-processing/cdknodejs10.x/queue-processing/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs10.x/queue-processing/cdknodejs14.x/queue-processing/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs10.x/scheduled-job/cdknodejs14.x/queue-processing/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs14.x/notifications-processing/cdknodejs14.x/scheduled-job/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs14.x/author-from-scratch/cdknodejs14.x/queue-processing/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs10.x/author-from-scratch/cdknodejs14.x/scheduled-job/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs10.x/scheduled-job/cdknodejs14.x/file-processing/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs10.x/queue-processing/cdknodejs10.x/scheduled-job/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs10.x/scheduled-job/cdknodejs14.x/serverless-api-backend/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs14.x/author-from-scratch/cdknodejs14.x/file-processing/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs14.x/author-from-scratch/cdknodejs14.x/serverless-api-backend/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs10.x/notifications-processing/cdknodejs14.x/serverless-api-backend/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs10.x/queue-processing/cdknodejs14.x/file-processing/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs10.x/author-from-scratch/cdknodejs14.x/author-from-scratch/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs14.x/notifications-processing/cdknodejs14.x/serverless-api-backend/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |
| 25 | x 2 | nodejs10.x/author-from-scratch/cdknodejs10.x/file-processing/cdk | buildspec.ymlbuildspec.yml |
1:32 (100%)1:32 (100%) | view |