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
- 5% duplication:
- 12,766 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 676 duplicated lines
- 64 duplicates
Duplication per Extension
Duplication per Component (primary)
Longest Duplicates
The list of 50 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 16 | x 2 | typescripttypescript | 655:672 (2%)695:712 (2%) | view | |
| 11 | x 2 | packages/recoil/hookspackages/recoil/hooks | 429:442 (2%)492:504 (2%) | view | |
| 11 | x 2 | packages/recoil/hookspackages/recoil/hooks | 263:277 (2%)641:659 (2%) | view | |
| 10 | x 2 | packages/shared/utilpackages/shared/util | 46:59 (17%)76:89 (17%) | view | |
| 10 | x 2 | packages-ext/todo-example/src/components/Todopackages-ext/todo-example/src/components/Todo | 1:10 (24%)1:10 (37%) | view | |
| 10 | x 2 | packages-ext/todo-example/src/components/Todopackages-ext/todo-example/src/components/Todo | 1:10 (34%)1:10 (37%) | view | |
| 10 | x 2 | packages-ext/todo-example/src/components/Todopackages-ext/todo-example/src/components/Todo | 1:10 (19%)1:10 (24%) | view | |
| 10 | x 2 | packages-ext/todo-example/src/components/Todopackages-ext/todo-example/src/components/Todo | 1:10 (19%)1:10 (40%) | view | |
| 10 | x 2 | packages-ext/todo-example/src/components/Todopackages-ext/todo-example/src/components/Todo | 1:10 (19%)1:10 (37%) | view | |
| 10 | x 2 | packages-ext/todo-example/src/components/Todopackages-ext/todo-example/src/components/Todo | 1:10 (24%)1:10 (40%) | view | |
| 10 | x 2 | typescripttypescript | 181:190 (1%)203:212 (1%) | view | |
| 10 | x 2 | typescripttypescript | 181:190 (1%)192:201 (1%) | view | |
| 10 | x 2 | packages-ext/todo-example/src/components/Todopackages-ext/todo-example/src/components/Todo | 1:10 (24%)1:10 (34%) | view | |
| 10 | x 2 | packages-ext/todo-example/src/components/Todopackages-ext/todo-example/src/components/Todo | 1:10 (19%)1:10 (34%) | view | |
| 10 | x 2 | typescripttypescript | 192:201 (1%)203:212 (1%) | view | |
| 10 | x 2 | packages-ext/todo-example/src/components/Todopackages-ext/todo-example/src/components/Todo | 1:10 (34%)1:10 (40%) | view | |
| 10 | x 2 | packages-ext/todo-example/src/components/Todopackages-ext/todo-example/src/components/Todo | 1:10 (37%)1:10 (40%) | view | |
| 10 | x 2 | packages/recoil/adtpackages/recoil/adt | 51:63 (16%)70:82 (16%) | view | |
| 9 | x 2 | packages/recoil/recoil_valuespackages/recoil/recoil_values | 132:141 (3%)215:225 (3%) | view | |
| 9 | x 2 | packages/recoil/recoil_valuespackages/recoil/recoil_values | 162:172 (3%)215:225 (3%) | view | |
| 9 | x 2 | packages/recoil/recoil_valuespackages/recoil/recoil_values | 132:141 (3%)260:270 (3%) | view | |
| 9 | x 2 | packages/recoil/recoil_valuespackages/recoil/recoil_values | 162:172 (3%)260:270 (3%) | view | |
| 9 | x 2 | packages/recoil/corepackages/shared/__test_utils__ | 87:96 (3%)78:87 (2%) | view | |
| 9 | x 2 | packages/recoil/recoil_valuespackages/recoil/recoil_values | 215:225 (3%)260:270 (3%) | view | |
| 9 | x 2 | ROOTROOT | 134:142 (7%)151:159 (7%) | view | |
| 9 | x 2 | packages/recoil/recoil_valuespackages/recoil/recoil_values | 132:141 (3%)162:172 (3%) | view | |
| 8 | x 2 | packages-ext/recoil-devtools/src/utilspackages-ext/recoil-devtools/src/utils | 80:88 (11%)99:107 (11%) | view | |
| 8 | x 2 | packages/recoil/recoil_valuespackages/recoil/recoil_values | 205:213 (3%)250:258 (3%) | view | |
| 8 | x 2 | packages/recoil/recoil_valuespackages/recoil/recoil_values | 24:33 (8%)37:48 (6%) | view | |
| 8 | x 2 | packages/recoil/recoil_valuespackages/recoil/recoil_values | 752:759 (1%)769:776 (1%) | view | |
| 8 | x 2 | packages/recoil/recoil_valuespackages/recoil/recoil_values | 152:160 (3%)205:213 (3%) | view | |
| 8 | x 2 | packages/recoil/recoil_valuespackages/recoil/recoil_values | 69:80 (1%)21:31 (6%) | view | |
| 8 | x 2 | packages/recoil/recoil_valuespackages/recoil/recoil_values | 1198:1205 (1%)1212:1219 (1%) | view | |
| 8 | x 2 | packages/recoil/recoil_valuespackages/recoil/recoil_values | 152:160 (3%)250:258 (3%) | view | |
| 8 | x 2 | packages/refinepackages/refine | 183:190 (11%)70:77 (9%) | view | |
| 8 | x 2 | packages-ext/recoil-devtools/src/utilspackages-ext/recoil-devtools/src/utils | 100:107 (3%)135:142 (3%) | view | |
| 7 | x 2 | packages/refinepackages/refine | 48:58 (3%)86:95 (3%) | view | |
| 7 | x 2 | packages-ext/recoil-devtools/src/pages/Pagepackages-ext/recoil-devtools/src/pages/Page | 55:61 (4%)71:77 (4%) | view | |
| 7 | x 2 | packages/recoil/hookspackages/recoil/hooks | 364:370 (1%)436:442 (1%) | view | |
| 7 | x 2 | packages/recoil/recoil_valuespackages/recoil/recoil_values | 75:81 (1%)82:88 (1%) | view | |
| 7 | x 2 | packages-ext/recoil-devtools/src/utils/sankeypackages-ext/recoil-devtools/src/utils/sankey | 73:79 (4%)101:107 (4%) | view | |
| 7 | x 2 | packages-ext/recoil-devtools/src/pages/Popup/Itemspackages-ext/recoil-devtools/src/pages/Popup/Items | 10:20 (16%)10:23 (5%) | view | |
| 7 | x 2 | packages/recoil/cachespackages/recoil/caches | 43:51 (15%)44:51 (14%) | view | |
| 7 | x 2 | ROOTROOT | 77:86 (5%)89:98 (5%) | view | |
| 7 | x 2 | packages/recoil/hookspackages/recoil/hooks | 364:370 (1%)498:504 (1%) | view | |
| 7 | x 2 | packages/recoil/hookspackages/recoil/hooks | 305:312 (1%)433:440 (1%) | view | |
| 7 | x 2 | packages/refinepackages/refine | 356:362 (6%)81:87 (8%) | view | |
| 7 | x 2 | packages/refinepackages/refine | 115:126 (3%)234:245 (3%) | view | |
| 7 | x 2 | packages/recoil/hookspackages/recoil/hooks | 305:312 (1%)495:502 (1%) | view | |
| 6 | x 2 | typescripttypescript | 577:589 (1%)611:623 (1%) | view |
Duplicated Units
The list of top 1 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 7 | x 2 | packages/recoil/cachespackages/recoil/caches | 43:52 44:52 | view |