• There are 24 files with units, with 4,456 lines of code.
• 0 very complex files (McCabe index sum 251+; 0 lines of code)
• 0 complex files (McCabe index sum 126-250; 0 lines of code)
• 4 medium complex files (McCabe index sum 51-125; 1,926 lines of code)
• 4 slightly complex files (McCabe index sum 26-50; 882 lines of code)
• 16 simple files (McCabe index sum 1-25; 1,648 lines of code)
• 11 main files have no units (e.g. languages without unit analysis, or files without functions) and are not classified.

The McCabe index of a file grows with its size: per 100 lines tells a large but plain file from a dense one, and most complex unit whether the complexity sits in one unit or is spread over many.

File	# lines	# units	McCabe index (sum)	per 100 lines	most complex unit
HexMap.js in src/js/cartograms	540	35	89	16	27
HexMapTimer.js in src/js/cartograms	438	30	85	19	29
HexMap2.js in src/js/cartograms	479	27	81	17	30
HexMap1.js in src/js/cartograms	469	27	79	17	30
RegionsMap.js in src/js/cartograms	407	9	47	12	25
UKCartogram.js in src/js/cartograms	247	15	36	15	10
edd.js in src/js/common	128	10	33	26	11
TouchEvents.js in src/js/common	100	7	31	31	12
ConstituencyExpand.js in src/js/common	99	8	23	23	7
UKCartogramComparison.js in src/js/cartograms	137	7	17	12	8
utilities.js in src/js/common	77	7	17	22	9
main.js in src/js/cartograms	257	9	16	6	4
ConstituencyDropDown.js in src/js/common	81	6	13	16	6
stickElement.js in src/js/common	41	4	9	22	5
Gruntfile.js in root	248	2	6	2	5
Histogram.js in src/js/common	192	4	6	3	2
boot.js in src	21	5	5	24	1
boot.js in src/embed	21	5	5	24	1
shareButtons.js in src/js/common	36	2	5	14	3
page.js in src/js/page	59	1	4	7	4
MapsTable.js in src/js/cartograms	96	4	4	4	1
main.js in src/js	56	3	3	5	1
ReferenceMap.js in src/js/cartograms	36	1	1	3	1
Barchart.js in src/js/common	191	1	1	1	1

• File complexity is the sum of the McCabe indexes (conditional complexity) of the units (methods, functions...) in a file.
• Files are classified in five categories based on that sum: 1-25 (simple files), 26-50 (slightly complex files), 51-125 (medium complex files), 126-250 (complex files), 251+ (very complex files). The default bands are five times the unit complexity bands, as a file is a group of units.
• Only main code files with units are classified. Files without units (languages without unit analysis, or files without functions) have no complexity to measure and are left out rather than counted as simple.
• A very complex file holds many decisions, which often means it has too many responsibilities: a candidate to split, and a place where changes need more testing.