Duplication · guardian/targeted-political-advertising

Duplication Overall

7% duplication:

2,956 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
219 duplicated lines

19 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 19 longest duplicates.

See data for all 19 duplicates...

Size	#	Folders	Files	Lines	Code
33	x 2	src/js/text src/js/text	main.html search.html	18:96 (80%) 1:79 (100%)	view
26	x 2	src/js src/js	embed.js main.js	9:37 (92%) 6:34 (96%)	view
19	x 2	src/js/text src/js/text	main.html social.html	30:72 (46%) 6:48 (86%)	view
19	x 2	src/js/text src/js/text	search.html social.html	13:55 (57%) 6:48 (86%)	view
9	x 2	src/css src/css	embed.scss main.scss	1:9 (100%) 1:9 (100%)	view
8	x 2	src/js/modules src/js/modules	politico.js politico.js	439:452 (3%) 472:485 (3%)	view
6	x 2	src/js/modules src/js/modules	politico.js politico.js	74:79 (2%) 242:247 (2%)	view
6	x 2	src/js/modules src/js/modules	politico.js politico.js	74:79 (2%) 324:329 (2%)	view
6	x 2	src/js/modules src/js/modules	politico.js politico.js	242:247 (2%) 324:329 (2%)	view
6	x 2	src/js/modules src/js/modules	politico.js politico.js	407:415 (2%) 441:449 (2%)	view
6	x 2	src/js/modules src/js/modules	politico.js politico.js	407:415 (2%) 474:482 (2%)	view
6	x 2	src/js src/js	config.js config.js	177:182 (<1%) 247:252 (<1%)	view
6	x 2	src/js src/js	config.js config.js	479:484 (<1%) 649:654 (<1%)	view
6	x 2	src/js src/js/modules	main.js politico.js	26:31 (22%) 74:79 (2%)	view
6	x 2	src/js src/js/modules	main.js politico.js	26:31 (22%) 242:247 (2%)	view
6	x 2	src/js src/js/modules	main.js politico.js	26:31 (22%) 324:329 (2%)	view
6	x 2	src/js src/js/modules	embed.js politico.js	29:34 (21%) 74:79 (2%)	view
6	x 2	src/js src/js/modules	embed.js politico.js	29:34 (21%) 242:247 (2%)	view
6	x 2	src/js src/js/modules	embed.js politico.js	29:34 (21%) 324:329 (2%)	view

Most Frequent Duplicates

The list of 16 most frequently found duplicates.

Size	#	Folders	Files	Lines	Code
6	x 5	src/js src/js/modules src/js src/js/modules src/js/modules	main.js politico.js embed.js politico.js politico.js	26:31 (22%) 74:79 (2%) 29:34 (21%) 242:247 (2%) 324:329 (2%)	view
6	x 3	src/js/text src/js/text src/js/text	main.html search.html social.html	44:58 (14%) 27:41 (18%) 20:34 (27%)	view
6	x 3	src/js/text src/js/text src/js/text	main.html search.html social.html	52:64 (14%) 35:47 (18%) 28:40 (27%)	view
6	x 3	src/js/text src/js/text src/js/text	main.html search.html social.html	40:52 (14%) 23:35 (18%) 16:28 (27%)	view
6	x 3	src/js/modules src/js/modules src/js/modules	politico.js politico.js politico.js	407:415 (2%) 441:449 (2%) 474:482 (2%)	view
6	x 3	src/js/text src/js/text src/js/text	main.html search.html social.html	32:42 (14%) 15:25 (18%) 8:18 (27%)	view
6	x 3	src/js/text src/js/text src/js/text	main.html search.html social.html	34:44 (14%) 17:27 (18%) 10:20 (27%)	view
6	x 3	src/js/text src/js/text src/js/text	main.html search.html social.html	50:62 (14%) 33:45 (18%) 26:38 (27%)	view
6	x 3	src/js/text src/js/text src/js/text	main.html search.html social.html	58:70 (14%) 41:53 (18%) 34:46 (27%)	view
6	x 3	src/js/text src/js/text src/js/text	main.html search.html social.html	60:72 (14%) 43:55 (18%) 36:48 (27%)	view
6	x 3	src/js/text src/js/text src/js/text	main.html search.html social.html	42:56 (14%) 25:39 (18%) 18:32 (27%)	view
6	x 3	src/js/text src/js/text src/js/text	main.html search.html social.html	46:60 (14%) 29:43 (18%) 22:36 (27%)	view
6	x 3	src/js/text src/js/text src/js/text	main.html search.html social.html	38:50 (14%) 21:33 (18%) 14:26 (27%)	view
6	x 3	src/js/text src/js/text src/js/text	main.html search.html social.html	30:40 (14%) 13:23 (18%) 6:16 (27%)	view
6	x 3	src/js/text src/js/text src/js/text	main.html search.html social.html	36:46 (14%) 19:29 (18%) 12:22 (27%)	view
6	x 3	src/js/text src/js/text src/js/text	main.html search.html social.html	56:68 (14%) 39:51 (18%) 32:44 (27%)	view

Duplicated Units

The list of top 1 duplicated units.

See data for all 1 unit duplicate

Size	#	Folders	Files	Lines	Code
8	x 2	src/js src/js	embed.js main.js	16:25 13:22	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."