Duplication · guardian/interactive-brexit-tracker

Duplication Overall

5% duplication:

3,717 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
217 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
11	x 2	src/css src/css	main.scss main.scss	110:122 (<1%) 689:700 (<1%)	view
11	x 2	src/js src/server	util.js fromdoc.js	64:74 (7%) 8:18 (4%)	view
10	x 2	src/js src/js	app.js util.js	156:165 (1%) 45:54 (7%)	view
9	x 2	src/css src/css	main.scss main.scss	112:121 (<1%) 399:408 (<1%)	view
9	x 2	src/css src/css	main.scss main.scss	399:408 (<1%) 690:699 (<1%)	view
9	x 2	ROOT ROOT	gulpfile.babel.js gulpfile.babel.js	231:239 (3%) 242:250 (3%)	view
8	x 2	src/css src/css	main.scss main.scss	51:60 (<1%) 63:72 (<1%)	view
8	x 2	src/css src/css	main.scss main.scss	861:869 (<1%) 876:884 (<1%)	view
8	x 2	src/css src/css	main.scss main.scss	861:869 (<1%) 892:900 (<1%)	view
8	x 2	src/css src/css	main.scss main.scss	876:884 (<1%) 892:900 (<1%)	view
8	x 2	ROOT ROOT	gulpfile.babel.js gulpfile.babel.js	283:292 (3%) 300:309 (3%)	view
8	x 2	src/server src/server	fromdoc.js fromdoc.js	162:169 (3%) 183:190 (3%)	view
8	x 2	src/css src/css	_fonts.scss _snapfonts.scss	111:118 (7%) 3:10 (88%)	view
7	x 2	src/js src/js	app.js app.js	383:389 (1%) 737:743 (1%)	view
6	x 2	src/css/guss-typography src/css/guss-typography	_typography.mixins.scss _typography.mixins.scss	188:193 (5%) 200:205 (5%)	view
6	x 2	src/server src/server	similarity.js similarity.js	112:117 (6%) 122:127 (6%)	view

Most Frequent Duplicates

The list of 7 most frequently found duplicates.

Size	#	Folders	Files	Lines	Code
6	x 3	src/css src/css src/css	main.scss main.scss main.scss	864:869 (<1%) 879:884 (<1%) 895:900 (<1%)	view
6	x 3	src/css src/css src/css	main.scss main.scss main.scss	113:119 (<1%) 400:406 (<1%) 691:697 (<1%)	view
6	x 3	src/css src/css src/css	main.scss main.scss main.scss	112:117 (<1%) 399:404 (<1%) 690:695 (<1%)	view
6	x 3	src/css src/css src/css	main.scss main.scss main.scss	863:868 (<1%) 878:883 (<1%) 894:899 (<1%)	view
6	x 3	src/css src/css src/css	main.scss main.scss main.scss	861:867 (<1%) 876:882 (<1%) 892:898 (<1%)	view
6	x 3	src/css src/css src/css	main.scss main.scss main.scss	114:120 (<1%) 401:407 (<1%) 692:698 (<1%)	view
6	x 3	src/css src/css src/css	main.scss main.scss main.scss	115:121 (<1%) 402:408 (<1%) 693:699 (<1%)	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."