Duplication · guardian/invoicing-api

Duplication Overall

16% duplication:

2,291 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
379 duplicated lines

35 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 35 longest duplicates.

See data for all 35 duplicates...

Size	#	Folders	Files	Lines	Code
35	x 2	src/main/scala/com/gu/invoicing/refund src/main/scala/com/gu/in.../refundErroneousPayment	Model.scala Model.scala	127:161 (20%) 68:102 (31%)	view
15	x 2	src/main/scala/com/gu/invoicing/refund src/main/scala/com/gu/in.../refundErroneousPayment	Model.scala Model.scala	44:58 (8%) 31:46 (13%)	view
13	x 2	ROOT ROOT	cfn.yaml cfn.yaml	155:167 (2%) 178:190 (2%)	view
13	x 2	ROOT ROOT	cfn.yaml cfn.yaml	155:167 (2%) 201:213 (2%)	view
13	x 2	ROOT ROOT	cfn.yaml cfn.yaml	155:167 (2%) 224:236 (2%)	view
13	x 2	ROOT ROOT	cfn.yaml cfn.yaml	155:167 (2%) 247:259 (2%)	view
13	x 2	ROOT ROOT	cfn.yaml cfn.yaml	155:167 (2%) 270:282 (2%)	view
13	x 2	ROOT ROOT	cfn.yaml cfn.yaml	178:190 (2%) 201:213 (2%)	view
13	x 2	ROOT ROOT	cfn.yaml cfn.yaml	178:190 (2%) 224:236 (2%)	view
13	x 2	ROOT ROOT	cfn.yaml cfn.yaml	178:190 (2%) 247:259 (2%)	view
13	x 2	ROOT ROOT	cfn.yaml cfn.yaml	178:190 (2%) 270:282 (2%)	view
13	x 2	ROOT ROOT	cfn.yaml cfn.yaml	201:213 (2%) 224:236 (2%)	view
13	x 2	ROOT ROOT	cfn.yaml cfn.yaml	201:213 (2%) 247:259 (2%)	view
13	x 2	ROOT ROOT	cfn.yaml cfn.yaml	201:213 (2%) 270:282 (2%)	view
13	x 2	ROOT ROOT	cfn.yaml cfn.yaml	224:236 (2%) 247:259 (2%)	view
13	x 2	ROOT ROOT	cfn.yaml cfn.yaml	224:236 (2%) 270:282 (2%)	view
13	x 2	ROOT ROOT	cfn.yaml cfn.yaml	247:259 (2%) 270:282 (2%)	view
12	x 2	ROOT ROOT	cfn.yaml cfn.yaml	46:57 (1%) 74:85 (1%)	view
12	x 2	ROOT ROOT	cfn.yaml cfn.yaml	102:113 (1%) 130:141 (1%)	view
11	x 2	src/main/scala/com/gu/invoicing/refund src/main/scala/com/gu/in.../refundErroneousPayment	Model.scala Model.scala	12:22 (6%) 11:22 (9%)	view
9	x 2	src/main/scala/com/gu/invoicing/invoice src/main/scala/com/gu/invoicing/preview	Model.scala Model.scala	11:19 (6%) 79:87 (9%)	view
9	x 2	src/main/scala/com/gu/invoicing/nextinvoicedate src/main/scala/com/gu/invoicing/preview	Impl.scala Impl.scala	28:36 (20%) 106:114 (3%)	view
8	x 2	src/main/scala/com/gu/in.../refundErroneousPayment src/main/scala/com/gu/in.../refundErroneousPayment	Impl.scala Impl.scala	82:89 (8%) 99:106 (8%)	view
7	x 2	src/main/scala/com/gu/invoicing/refund src/main/scala/com/gu/in.../refundErroneousPayment	Lambda.scala Lambda.scala	43:49 (87%) 43:50 (58%)	view
7	x 2	src/main/scala/com/gu/invoicing/nextinvoicedate src/main/scala/com/gu/invoicing/preview	Model.scala Model.scala	12:18 (29%) 65:71 (7%)	view
6	x 2	ROOT ROOT	cfn.yaml cfn.yaml	52:57 (<1%) 108:113 (<1%)	view
6	x 2	ROOT ROOT	cfn.yaml cfn.yaml	52:57 (<1%) 136:141 (<1%)	view
6	x 2	ROOT ROOT	cfn.yaml cfn.yaml	80:85 (<1%) 108:113 (<1%)	view
6	x 2	ROOT ROOT	cfn.yaml cfn.yaml	80:85 (<1%) 136:141 (<1%)	view
6	x 2	src/main/scala/com/gu/in.../refundErroneousPayment src/main/scala/com/gu/in.../refundErroneousPayment	Impl.scala Impl.scala	26:31 (6%) 83:88 (6%)	view
6	x 2	src/main/scala/com/gu/in.../refundErroneousPayment src/main/scala/com/gu/in.../refundErroneousPayment	Impl.scala Impl.scala	26:31 (6%) 100:105 (6%)	view
6	x 2	src/main/scala/com/gu/in.../refundErroneousPayment src/main/scala/com/gu/in.../refundErroneousPayment	Impl.scala Impl.scala	91:96 (6%) 108:113 (6%)	view
6	x 2	src/main/scala/com/gu/invoicing/refund src/main/scala/com/gu/in.../refundErroneousPayment	Model.scala Model.scala	86:91 (3%) 24:29 (5%)	view
6	x 2	src/main/scala/com/gu/invoicing/nextinvoicedate src/main/scala/com/gu/invoicing/preview	Impl.scala Impl.scala	20:25 (13%) 98:103 (2%)	view
6	x 2	src/main/scala/com/gu/invoicing/refund src/main/scala/com/gu/in.../refundErroneousPayment	Impl.scala Impl.scala	61:66 (3%) 29:34 (6%)	view

Most Frequent Duplicates

The list of 10 most frequently found duplicates.

Size	#	Folders	Files	Lines	Code
6	x 6	ROOT ROOT ROOT ROOT ROOT ROOT	cfn.yaml cfn.yaml cfn.yaml cfn.yaml cfn.yaml cfn.yaml	159:164 (<1%) 182:187 (<1%) 205:210 (<1%) 228:233 (<1%) 251:256 (<1%) 274:279 (<1%)	view
6	x 6	ROOT ROOT ROOT ROOT ROOT ROOT	cfn.yaml cfn.yaml cfn.yaml cfn.yaml cfn.yaml cfn.yaml	155:160 (<1%) 178:183 (<1%) 201:206 (<1%) 224:229 (<1%) 247:252 (<1%) 270:275 (<1%)	view
6	x 6	ROOT ROOT ROOT ROOT ROOT ROOT	cfn.yaml cfn.yaml cfn.yaml cfn.yaml cfn.yaml cfn.yaml	158:163 (<1%) 181:186 (<1%) 204:209 (<1%) 227:232 (<1%) 250:255 (<1%) 273:278 (<1%)	view
6	x 6	ROOT ROOT ROOT ROOT ROOT ROOT	cfn.yaml cfn.yaml cfn.yaml cfn.yaml cfn.yaml cfn.yaml	161:166 (<1%) 184:189 (<1%) 207:212 (<1%) 230:235 (<1%) 253:258 (<1%) 276:281 (<1%)	view
6	x 6	ROOT ROOT ROOT ROOT ROOT ROOT	cfn.yaml cfn.yaml cfn.yaml cfn.yaml cfn.yaml cfn.yaml	156:161 (<1%) 179:184 (<1%) 202:207 (<1%) 225:230 (<1%) 248:253 (<1%) 271:276 (<1%)	view
6	x 6	ROOT ROOT ROOT ROOT ROOT ROOT	cfn.yaml cfn.yaml cfn.yaml cfn.yaml cfn.yaml cfn.yaml	162:167 (<1%) 185:190 (<1%) 208:213 (<1%) 231:236 (<1%) 254:259 (<1%) 277:282 (<1%)	view
6	x 6	ROOT ROOT ROOT ROOT ROOT ROOT	cfn.yaml cfn.yaml cfn.yaml cfn.yaml cfn.yaml cfn.yaml	160:165 (<1%) 183:188 (<1%) 206:211 (<1%) 229:234 (<1%) 252:257 (<1%) 275:280 (<1%)	view
6	x 6	ROOT ROOT ROOT ROOT ROOT ROOT	cfn.yaml cfn.yaml cfn.yaml cfn.yaml cfn.yaml cfn.yaml	157:162 (<1%) 180:185 (<1%) 203:208 (<1%) 226:231 (<1%) 249:254 (<1%) 272:277 (<1%)	view
6	x 4	ROOT ROOT ROOT ROOT	cfn.yaml cfn.yaml cfn.yaml cfn.yaml	52:57 (<1%) 80:85 (<1%) 108:113 (<1%) 136:141 (<1%)	view
6	x 3	src/main/scala/com/gu/in.../refundErroneousPayment src/main/scala/com/gu/in.../refundErroneousPayment src/main/scala/com/gu/in.../refundErroneousPayment	Impl.scala Impl.scala Impl.scala	26:31 (6%) 83:88 (6%) 100:105 (6%)	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."