Duplication · guardian/editorial-tools-migration

Duplication Overall

14% duplication:

2,317 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
347 duplicated lines

16 duplicates

dependency graphs: 2D graph | 2D graph (with duplicates)... | 3D graph | 3D graph (with duplicates)...

Duplication per Extension

Duplication per Component (primary)

Longest Duplicates

The list of 16 longest duplicates.

See data for all 16 duplicates...

Size	#	Folders	Files	Lines	Code
37	x 2	stats/web/src stats/web/src	ProgressChart.tsx RepoProgressChart.tsx	151:188 (22%) 204:241 (18%)	view
22	x 2	stats/web/src stats/web/src	ProgressChart.tsx RepoProgressChart.tsx	91:113 (13%) 101:123 (10%)	view
22	x 2	stats/web/src stats/web/src	ProgressChart.tsx RepoProgressChart.tsx	119:140 (13%) 172:193 (10%)	view
12	x 2	stats/web/src stats/web/src	ProgressChart.tsx RepoProgressChart.tsx	57:71 (7%) 57:71 (5%)	view
9	x 2	stats/web/src stats/web/src	ProgressChart.tsx RepoProgressChart.tsx	23:35 (5%) 25:37 (4%)	view
9	x 2	stats/web/src/components stats/web/src/components	CoverageBar.tsx ProgressBar.tsx	6:15 (20%) 5:14 (30%)	view
9	x 2	stats/web/src/components stats/web/src/components	CoverageBar.tsx ProgressBar.tsx	29:37 (20%) 22:30 (30%)	view
8	x 2	stats/web/src stats/web/src	App.tsx App.tsx	33:40 (2%) 48:55 (2%)	view
8	x 2	stats/web/src stats/web/src	App.tsx App.tsx	377:384 (2%) 426:433 (2%)	view
8	x 2	stats/web/src stats/web/src	ProgressChart.tsx RepoProgressChart.tsx	12:21 (4%) 10:19 (3%)	view
7	x 2	stats stats	count_frontend_loc.py count_frontend_loc.py	127:133 (1%) 135:141 (1%)	view
7	x 2	stats stats	count_frontend_loc.py count_frontend_loc.py	708:714 (1%) 723:729 (1%)	view
7	x 2	stats/web/src stats/web/src	BurndownChart.tsx ProgressChart.tsx	131:137 (4%) 124:130 (4%)	view
7	x 2	stats/web/src stats/web/src	BurndownChart.tsx RepoProgressChart.tsx	131:137 (4%) 177:183 (3%)	view
6	x 2	stats/web/src stats/web/src	App.tsx App.tsx	351:356 (1%) 399:404 (1%)	view
6	x 2	stats/web stats/web	vite.config.js vite.config.ts	3:8 (100%) 4:9 (100%)	view

Most Frequent Duplicates

The list of 2 most frequently found duplicates.

Size	#	Folders	Files	Lines	Code
6	x 3	stats/web/src stats/web/src stats/web/src	BurndownChart.tsx ProgressChart.tsx RepoProgressChart.tsx	131:136 (3%) 124:129 (3%) 177:182 (2%)	view
6	x 3	stats/web/src stats/web/src stats/web/src	BurndownChart.tsx ProgressChart.tsx RepoProgressChart.tsx	132:137 (3%) 125:130 (3%) 178:183 (2%)	view

About This Analysis

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.

Learn more...

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."