Duplication · guardian/interactive-euro16-wallchart

Duplication Overall

1,357 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
186 duplicated lines

Duplication per Extension

Duplication per Component (primary)

Longest Duplicates

The list of 13 longest duplicates.

Size	#	Folders	Files	Lines	Code
19	x 2	src src/embed	boot.js boot.js	1:28 (100%) 1:28 (100%)	view
18	x 2	src/css/modules src/css/modules	_venues.scss _wallchart.scss	5:26 (10%) 5:26 (11%)	view
14	x 2	src/css src/css/modules	main.scss _header.scss	74:94 (3%) 8:25 (15%)	view
12	x 2	src/css src/css	main.scss main.scss	405:416 (2%) 433:444 (2%)	view
11	x 2	src/css src/css	main.scss main.scss	406:416 (2%) 454:465 (2%)	view
11	x 2	src/css src/css	main.scss main.scss	434:444 (2%) 454:465 (2%)	view
10	x 2	src/css src/css/modules	main.scss _hero.scss	81:94 (2%) 37:49 (19%)	view
10	x 2	src/css/modules src/css/modules	_header.scss _hero.scss	13:25 (11%) 37:49 (19%)	view
9	x 2	src/css src/css	main.scss main.scss	390:398 (2%) 408:416 (2%)	view
9	x 2	src/css src/css	main.scss main.scss	390:398 (2%) 436:444 (2%)	view
9	x 2	src/css src/css	main.scss main.scss	390:398 (2%) 456:465 (2%)	view
8	x 2	src/embed src	index.html index.html	17:29 (42%) 13:23 (50%)	view
7	x 2	ROOT ROOT	Gruntfile.js Gruntfile.js	163:169 (3%) 175:182 (3%)	view

Most Frequent Duplicates

The list of 11 most frequently found duplicates.

Size	#	Folders	Files	Lines	Code
6	x 4	src/css src/css src/css src/css	main.scss main.scss main.scss main.scss	390:395 (1%) 408:413 (1%) 436:441 (1%) 456:461 (1%)	view
6	x 4	src/css src/css src/css src/css	main.scss main.scss main.scss main.scss	391:396 (1%) 409:414 (1%) 437:442 (1%) 457:462 (1%)	view
6	x 4	src/css src/css src/css src/css	main.scss main.scss main.scss main.scss	392:397 (1%) 410:415 (1%) 438:443 (1%) 458:463 (1%)	view
6	x 4	src/css src/css src/css src/css	main.scss main.scss main.scss main.scss	393:398 (1%) 411:416 (1%) 439:444 (1%) 459:465 (1%)	view
6	x 3	src/css/modules src/css/modules src/css	_header.scss _hero.scss main.scss	13:20 (6%) 37:44 (11%) 81:88 (1%)	view
6	x 3	src/css/modules src/css/modules src/css	_header.scss _hero.scss main.scss	19:25 (6%) 43:49 (11%) 87:94 (1%)	view
6	x 3	src/css/modules src/css/modules src/css	_header.scss _hero.scss main.scss	17:24 (6%) 41:48 (11%) 85:93 (1%)	view
6	x 3	src/css/modules src/css/modules src/css	_header.scss _hero.scss main.scss	16:23 (6%) 40:47 (11%) 84:91 (1%)	view
6	x 3	src/css/modules src/css/modules src/css	_header.scss _hero.scss main.scss	15:21 (6%) 39:45 (11%) 83:89 (1%)	view
6	x 3	src/css src/css src/css	main.scss main.scss main.scss	406:411 (1%) 434:439 (1%) 454:459 (1%)	view
6	x 3	src/css src/css src/css	main.scss main.scss main.scss	407:412 (1%) 435:440 (1%) 455:460 (1%)	view

Duplicated Units

The list of top 3 duplicated units.

Size	#	Folders	Files	Lines	Code
6	x 2	src src/embed	boot.js boot.js	4:11 4:11	view
19	x 2	src src/embed	boot.js boot.js	1:28 1:28	view
6	x 2	src src/embed	boot.js boot.js	14:26 14:26	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!"

"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."