Changes for page Code Example: Data Structure Style vs. Object Style

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...	...	@@ -1,10 +8,3 @@
1		-### Use Cases
2		-
3		-This example is intended to demonstrate the extensibility differences between data structures and objects by extending them with
4		-
5		-1. an Area() function (extending behavior)
6		-1. a rectangle type (extending data type)
7		-
8	8	### Data Structure Style
9	9
10	10	type Square struct {
...	...	@@ -12,28 +12,24 @@
12	12	}
13	13
14	14	type Circle struct {
15		- radius float
	8	+ length float
16	16	}
17	17
18		- func Circumference(g Object) float {
19		- switch type(g):
20		- case Square:
21		- return 4 * g.length
	11	+ func Area(g GeometricObject) float {
	12	+ switch (g.type()):
22	22	case Circle:
23		- return 2 * PI * g.radius
	14	+ return
	15	+ case Square:
	16	+ return ...
24	24	}
	18	+
	19	+ func Circumference(g GeometricObject) float {
	20	+ ...
	21	+ }
25	25
26		-1.
27		-
28		-####
29		-
30	30	#### Object-Oriented Style
31	31
32		- interface GeometricObject {
33		- Circumference() float
34		- }
35		-
36		- class Square implements GeometricObject {
	25	+ class Square {
37	37	length float
38	38
39	39	constructor(length float) {
...	...	@@ -40,12 +40,16 @@
40	40	this.length = length
41	41	}
42	42
	32	+ func Area() float {
	33	+ return this.length * this.length
	34	+ }
	35	+
43	43	func Circumference() float {
44	44	return 4 * this.length
45	45	}
46	46	}
47	47
48		- class Circle implements GeometricObject {
	41	+ class Circle {
49	49	radius float
50	50
51	51	constructor(radius float) {
...	...	@@ -52,6 +52,10 @@
52	52	this.radius = radius
53	53	}
54	54
	48	+ func Area() float {
	49	+ return PI * this.radius * this.radius
	50	+ }
	51	+
55	55	func Circumference() float {
56	56	return 2 * PI * this.radius
57	57	}