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
- 29% duplication:
- 9,107 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 2,717 duplicated lines
- 191 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
firestore-bigquery-export (2%)
--> storage-resize-images (8%)
162
5 file pairs
details...
firestore-bigquery-export (2%)
--> firestore-translate-text (10%)
148
4 file pairs
details...
auth-mailchimp-sync (19%)
--> delete-user-data (12%)
148
2 file pairs
details...
firestore-translate-text (9%)
--> storage-resize-images (7%)
146
2 file pairs
details...
firestore-shorten-urls-bitly (13%)
--> firestore-translate-text (9%)
140
2 file pairs
details...
firestore-send-email (6%)
--> firestore-shorten-urls-bitly (13%)
138
2 file pairs
details...
firestore-shorten-urls-bitly (12%)
--> rtdb-limit-child-nodes (26%)
130
2 file pairs
details...
delete-user-data (11%)
--> rtdb-limit-child-nodes (26%)
130
2 file pairs
details...
firestore-counter (3%)
--> firestore-shorten-urls-bitly (12%)
126
1 file pair
details...
firestore-counter (3%)
--> firestore-send-email (6%)
126
1 file pair
details...
firestore-translate-text (8%)
--> rtdb-limit-child-nodes (24%)
124
1 file pair
details...
firestore-bigquery-export (2%)
--> firestore-shorten-urls-bitly (11%)
120
1 file pair
details...
auth-mailchimp-sync (15%)
--> firestore-shorten-urls-bitly (11%)
120
3 file pairs
details...
auth-mailchimp-sync (15%)
--> rtdb-limit-child-nodes (24%)
120
2 file pairs
details...
rtdb-limit-child-nodes (23%)
--> storage-resize-images (5%)
116
1 file pair
details...
firestore-counter (3%)
--> firestore-translate-text (7%)
114
1 file pair
details...
firestore-send-email (5%)
--> firestore-translate-text (7%)
114
1 file pair
details...
firestore-send-email (5%)
--> rtdb-limit-child-nodes (22%)
114
2 file pairs
details...
delete-user-data (9%)
--> storage-resize-images (5%)
114
1 file pair
details...
delete-user-data (9%)
--> firestore-shorten-urls-bitly (11%)
114
2 file pairs
details...
delete-user-data (9%)
--> firestore-translate-text (7%)
114
1 file pair
details...
delete-user-data (9%)
--> firestore-send-email (5%)
112
2 file pairs
details...
firestore-bigquery-export (1%)
--> firestore-counter (2%)
108
1 file pair
details...
firestore-bigquery-export (1%)
--> rtdb-limit-child-nodes (21%)
108
1 file pair
details...
firestore-bigquery-export (1%)
--> firestore-send-email (5%)
108
1 file pair
details...
auth-mailchimp-sync (13%)
--> storage-resize-images (5%)
108
1 file pair
details...
auth-mailchimp-sync (13%)
--> firestore-translate-text (7%)
108
1 file pair
details...
delete-user-data (9%)
--> firestore-bigquery-export (1%)
106
1 file pair
details...
auth-mailchimp-sync (13%)
--> firestore-send-email (5%)
106
2 file pairs
details...
firestore-counter (2%)
--> storage-resize-images (5%)
102
1 file pair
details...
firestore-send-email (5%)
--> storage-resize-images (5%)
102
1 file pair
details...
firestore-counter (2%)
--> rtdb-limit-child-nodes (20%)
102
1 file pair
details...
firestore-shorten-urls-bitly (10%)
--> storage-resize-images (5%)
102
1 file pair
details...
delete-user-data (8%)
--> firestore-counter (2%)
100
1 file pair
details...
auth-mailchimp-sync (12%)
--> firestore-bigquery-export (1%)
100
1 file pair
details...
auth-mailchimp-sync (12%)
--> firestore-counter (2%)
94
1 file pair
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| firestore-bigquery-export (2%) --> storage-resize-images (8%) |
162 | 5 file pairs | details... |
| firestore-bigquery-export (2%) --> firestore-translate-text (10%) |
148 | 4 file pairs | details... |
| auth-mailchimp-sync (19%) --> delete-user-data (12%) |
148 | 2 file pairs | details... |
| firestore-translate-text (9%) --> storage-resize-images (7%) |
146 | 2 file pairs | details... |
| firestore-shorten-urls-bitly (13%) --> firestore-translate-text (9%) |
140 | 2 file pairs | details... |
| firestore-send-email (6%) --> firestore-shorten-urls-bitly (13%) |
138 | 2 file pairs | details... |
| firestore-shorten-urls-bitly (12%) --> rtdb-limit-child-nodes (26%) |
130 | 2 file pairs | details... |
| delete-user-data (11%) --> rtdb-limit-child-nodes (26%) |
130 | 2 file pairs | details... |
| firestore-counter (3%) --> firestore-shorten-urls-bitly (12%) |
126 | 1 file pair | details... |
| firestore-counter (3%) --> firestore-send-email (6%) |
126 | 1 file pair | details... |
| firestore-translate-text (8%) --> rtdb-limit-child-nodes (24%) |
124 | 1 file pair | details... |
| firestore-bigquery-export (2%) --> firestore-shorten-urls-bitly (11%) |
120 | 1 file pair | details... |
| auth-mailchimp-sync (15%) --> firestore-shorten-urls-bitly (11%) |
120 | 3 file pairs | details... |
| auth-mailchimp-sync (15%) --> rtdb-limit-child-nodes (24%) |
120 | 2 file pairs | details... |
| rtdb-limit-child-nodes (23%) --> storage-resize-images (5%) |
116 | 1 file pair | details... |
| firestore-counter (3%) --> firestore-translate-text (7%) |
114 | 1 file pair | details... |
| firestore-send-email (5%) --> firestore-translate-text (7%) |
114 | 1 file pair | details... |
| firestore-send-email (5%) --> rtdb-limit-child-nodes (22%) |
114 | 2 file pairs | details... |
| delete-user-data (9%) --> storage-resize-images (5%) |
114 | 1 file pair | details... |
| delete-user-data (9%) --> firestore-shorten-urls-bitly (11%) |
114 | 2 file pairs | details... |
| delete-user-data (9%) --> firestore-translate-text (7%) |
114 | 1 file pair | details... |
| delete-user-data (9%) --> firestore-send-email (5%) |
112 | 2 file pairs | details... |
| firestore-bigquery-export (1%) --> firestore-counter (2%) |
108 | 1 file pair | details... |
| firestore-bigquery-export (1%) --> rtdb-limit-child-nodes (21%) |
108 | 1 file pair | details... |
| firestore-bigquery-export (1%) --> firestore-send-email (5%) |
108 | 1 file pair | details... |
| auth-mailchimp-sync (13%) --> storage-resize-images (5%) |
108 | 1 file pair | details... |
| auth-mailchimp-sync (13%) --> firestore-translate-text (7%) |
108 | 1 file pair | details... |
| delete-user-data (9%) --> firestore-bigquery-export (1%) |
106 | 1 file pair | details... |
| auth-mailchimp-sync (13%) --> firestore-send-email (5%) |
106 | 2 file pairs | details... |
| firestore-counter (2%) --> storage-resize-images (5%) |
102 | 1 file pair | details... |
| firestore-send-email (5%) --> storage-resize-images (5%) |
102 | 1 file pair | details... |
| firestore-counter (2%) --> rtdb-limit-child-nodes (20%) |
102 | 1 file pair | details... |
| firestore-shorten-urls-bitly (10%) --> storage-resize-images (5%) |
102 | 1 file pair | details... |
| delete-user-data (8%) --> firestore-counter (2%) |
100 | 1 file pair | details... |
| auth-mailchimp-sync (12%) --> firestore-bigquery-export (1%) |
100 | 1 file pair | details... |
| auth-mailchimp-sync (12%) --> firestore-counter (2%) |
94 | 1 file pair | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 73 | x 2 | firestore-bigquery-export/scripts/import/srcfirestore-bigquery-export/scripts/import/src |  config.tsindex.ts |
68:148 (42%)145:225 (21%) | view |
| 57 | x 2 | firestore-counterfirestore-shorten-urls-bitly |  extension.yamlextension.yaml |
82:138 (43%)66:122 (44%) | view |
| 57 | x 2 | firestore-send-emailfirestore-shorten-urls-bitly | extension.yamlextension.yaml |
58:114 (41%)66:122 (44%) | view |
| 57 | x 2 | firestore-shorten-urls-bitlyfirestore-translate-text | extension.yamlextension.yaml |
66:122 (44%)63:119 (43%) | view |
| 57 | x 2 | firestore-counterfirestore-send-email | extension.yamlextension.yaml |
82:138 (43%)58:114 (41%) | view |
| 57 | x 2 | firestore-counterfirestore-translate-text | extension.yamlextension.yaml |
82:138 (43%)63:119 (43%) | view |
| 57 | x 2 | firestore-send-emailfirestore-translate-text | extension.yamlextension.yaml |
58:114 (41%)63:119 (43%) | view |
| 51 | x 2 | firestore-counterstorage-resize-images | extension.yamlextension.yaml |
88:138 (38%)72:122 (26%) | view |
| 51 | x 2 | rtdb-limit-child-nodesstorage-resize-images | extension.yamlextension.yaml |
67:117 (41%)72:122 (26%) | view |
| 51 | x 2 | firestore-send-emailstorage-resize-images | extension.yamlextension.yaml |
64:114 (36%)72:122 (26%) | view |
| 51 | x 2 | firestore-translate-textrtdb-limit-child-nodes | extension.yamlextension.yaml |
69:119 (39%)67:117 (41%) | view |
| 51 | x 2 | firestore-bigquery-exportfirestore-shorten-urls-bitly | extension.yamlextension.yaml |
67:117 (22%)72:122 (39%) | view |
| 51 | x 2 | firestore-counterrtdb-limit-child-nodes | extension.yamlextension.yaml |
88:138 (38%)67:117 (41%) | view |
| 51 | x 2 | firestore-bigquery-exportfirestore-counter | extension.yamlextension.yaml |
67:117 (22%)88:138 (38%) | view |
| 51 | x 2 | firestore-bigquery-exportrtdb-limit-child-nodes | extension.yamlextension.yaml |
67:117 (22%)67:117 (41%) | view |
| 51 | x 2 | firestore-bigquery-exportstorage-resize-images | extension.yamlextension.yaml |
67:117 (22%)72:122 (26%) | view |
| 51 | x 2 | firestore-shorten-urls-bitlyrtdb-limit-child-nodes | extension.yamlextension.yaml |
72:122 (39%)67:117 (41%) | view |
| 51 | x 2 | firestore-send-emailrtdb-limit-child-nodes | extension.yamlextension.yaml |
64:114 (36%)67:117 (41%) | view |
| 51 | x 2 | firestore-shorten-urls-bitlystorage-resize-images | extension.yamlextension.yaml |
72:122 (39%)72:122 (26%) | view |
| 51 | x 2 | firestore-bigquery-exportfirestore-send-email | extension.yamlextension.yaml |
67:117 (22%)64:114 (36%) | view |
Duplicated Units
The list of top 9 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 22 | x 2 | storage-resize-images/functions/libstorage-resize-images/functions/src |  resize-image.jsresize-image.ts |
31:53 37:63 | view |
| 12 | x 2 | firestore-send-email/functions/libfirestore-send-email/functions/src | index.jsindex.ts |
76:89 83:96 | view |
| 9 | x 2 | storage-resize-images/functions/libstorage-resize-images/functions/src | config.jsconfig.ts |
25:34 23:32 | view |
| 9 | x 2 | firestore-counter/functions/libfirestore-counter/functions/src | aggregator.jsaggregator.ts |
66:75 68:77 | view |
| 8 | x 2 | firestore-bigquery-export/functions/srcfirestore-shorten-urls-bitly/functions/lib | util.tsabstract-shortener.js |
22:30 63:71 | view |
| 7 | x 2 | firestore-send-email/functions/libfirestore-send-email/functions/src | index.jsindex.ts |
68:75 73:81 | view |
| 7 | x 2 | firestore-send-email/functions/libfirestore-send-email/functions/src | templates.jstemplates.ts |
39:46 49:57 | view |
| 7 | x 2 | firestore-counter/clients/nodefirestore-counter/clients/web/src | index.jsindex.ts |
53:60 61:68 | view |
| 7 | x 2 | firestore-counter/clients/nodefirestore-counter/clients/web/src | index.jsindex.ts |
119:126 130:137 | view |